./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH --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 26517bdd67184dea6352cf50b6d9992d41ecfd853675bfc685354b90b7b5bf40 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:24:45,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:24:45,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:24:45,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:24:45,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:24:45,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:24:45,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:24:45,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:24:45,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:24:45,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:24:45,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:24:45,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:24:45,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:24:45,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:24:45,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:24:45,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:24:45,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:24:45,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:24:45,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:24:45,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:24:45,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:24:45,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:24:45,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:24:45,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:24:45,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:24:45,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:24:45,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:24:45,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:24:45,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:24:45,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:24:45,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:24:45,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:24:45,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:24:45,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:24:45,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:24:45,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:24:45,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:24:45,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:24:45,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:24:45,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:24:45,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:24:45,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:24:45,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:24:45,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:24:45,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:24:45,998 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:24:45,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:24:45,999 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:24:45,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:24:45,999 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:24:45,999 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:24:46,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:24:46,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:24:46,000 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:24:46,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:24:46,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:24:46,001 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:24:46,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:24:46,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:24:46,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:24:46,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:24:46,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:24:46,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:24:46,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:24:46,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:24:46,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:24:46,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:24:46,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:24:46,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:24:46,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:24:46,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:24:46,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:24:46,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:24:46,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:24:46,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:24:46,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:24:46,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:24:46,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:24:46,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:24:46,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:24:46,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:24:46,008 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_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26517bdd67184dea6352cf50b6d9992d41ecfd853675bfc685354b90b7b5bf40 [2021-11-03 04:24:46,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:24:46,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:24:46,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:24:46,303 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:24:46,303 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:24:46,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2021-11-03 04:24:46,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/data/2a01fa886/be1dd703b2ea4733ab8392ff6c7b17c3/FLAG25fc95243 [2021-11-03 04:24:46,795 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:24:46,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c [2021-11-03 04:24:46,805 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/data/2a01fa886/be1dd703b2ea4733ab8392ff6c7b17c3/FLAG25fc95243 [2021-11-03 04:24:47,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/data/2a01fa886/be1dd703b2ea4733ab8392ff6c7b17c3 [2021-11-03 04:24:47,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:24:47,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:24:47,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:24:47,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:24:47,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:24:47,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3017f82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47, skipping insertion in model container [2021-11-03 04:24:47,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:24:47,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:24:47,385 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c[525,538] [2021-11-03 04:24:47,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:24:47,426 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:24:47,437 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound10.c[525,538] [2021-11-03 04:24:47,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:24:47,466 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:24:47,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47 WrapperNode [2021-11-03 04:24:47,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:24:47,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:24:47,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:24:47,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:24:47,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,509 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:24:47,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:24:47,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:24:47,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:24:47,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:24:47,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:24:47,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:24:47,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:24:47,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (1/1) ... [2021-11-03 04:24:47,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:24:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:47,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:24:47,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:24:47,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:24:47,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:24:47,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:24:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:24:48,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:24:48,180 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-03 04:24:48,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:24:48 BoogieIcfgContainer [2021-11-03 04:24:48,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:24:48,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:24:48,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:24:48,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:24:48,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:24:47" (1/3) ... [2021-11-03 04:24:48,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47eb4fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:24:48, skipping insertion in model container [2021-11-03 04:24:48,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:47" (2/3) ... [2021-11-03 04:24:48,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47eb4fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:24:48, skipping insertion in model container [2021-11-03 04:24:48,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:24:48" (3/3) ... [2021-11-03 04:24:48,191 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound10.c [2021-11-03 04:24:48,196 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:24:48,196 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-03 04:24:48,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:24:48,251 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 [2021-11-03 04:24:48,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-03 04:24:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 43 states have internal predecessors, (58), 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) [2021-11-03 04:24:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:24:48,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:48,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:24:48,272 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:24:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1143465249, now seen corresponding path program 1 times [2021-11-03 04:24:48,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:48,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892684031] [2021-11-03 04:24:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:48,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:48,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:48,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892684031] [2021-11-03 04:24:48,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892684031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:48,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:48,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:24:48,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779518706] [2021-11-03 04:24:48,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:24:48,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:24:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:24:48,523 INFO L87 Difference]: Start difference. First operand has 44 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 43 states have internal predecessors, (58), 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) [2021-11-03 04:24:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:48,551 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-03 04:24:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:24:48,554 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 [2021-11-03 04:24:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:48,562 INFO L225 Difference]: With dead ends: 84 [2021-11-03 04:24:48,563 INFO L226 Difference]: Without dead ends: 42 [2021-11-03 04:24:48,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:24:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-03 04:24:48,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-03 04:24:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-11-03 04:24:48,608 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 6 [2021-11-03 04:24:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:48,608 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-11-03 04:24:48,608 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) [2021-11-03 04:24:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-11-03 04:24:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 04:24:48,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:48,609 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:48,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:24:48,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:24:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:48,611 INFO L85 PathProgramCache]: Analyzing trace with hash 651938503, now seen corresponding path program 1 times [2021-11-03 04:24:48,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:48,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88592004] [2021-11-03 04:24:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:48,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:48,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:48,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88592004] [2021-11-03 04:24:48,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88592004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:48,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:48,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:24:48,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129553050] [2021-11-03 04:24:48,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:24:48,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:24:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:24:48,700 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:48,736 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-11-03 04:24:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:24:48,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 04:24:48,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:48,742 INFO L225 Difference]: With dead ends: 82 [2021-11-03 04:24:48,743 INFO L226 Difference]: Without dead ends: 44 [2021-11-03 04:24:48,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:24:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-03 04:24:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-03 04:24:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-03 04:24:48,757 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 7 [2021-11-03 04:24:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:48,758 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-03 04:24:48,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-03 04:24:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:24:48,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:48,759 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:48,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:24:48,759 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:24:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1215948133, now seen corresponding path program 1 times [2021-11-03 04:24:48,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:48,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175951148] [2021-11-03 04:24:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:48,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:49,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:49,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175951148] [2021-11-03 04:24:49,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175951148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:49,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:49,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:24:49,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795314208] [2021-11-03 04:24:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:24:49,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:24:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:24:49,083 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-03 04:24:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:54,917 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-03 04:24:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:24:54,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-03 04:24:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:54,920 INFO L225 Difference]: With dead ends: 85 [2021-11-03 04:24:54,920 INFO L226 Difference]: Without dead ends: 67 [2021-11-03 04:24:54,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:24:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-03 04:24:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-03 04:24:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 60 states have internal predecessors, (68), 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) [2021-11-03 04:24:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-03 04:24:54,930 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 8 [2021-11-03 04:24:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:54,930 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-03 04:24:54,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-03 04:24:54,931 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-03 04:24:54,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:24:54,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:54,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:54,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:24:54,933 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:24:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 960330495, now seen corresponding path program 1 times [2021-11-03 04:24:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:54,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104630492] [2021-11-03 04:24:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:54,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:54,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:24:54,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872730012] [2021-11-03 04:24:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:54,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:54,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:54,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:24:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:55,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:24:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:55,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:55,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:55,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104630492] [2021-11-03 04:24:55,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:24:55,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872730012] [2021-11-03 04:24:55,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872730012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:55,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:55,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 04:24:55,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188627022] [2021-11-03 04:24:55,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:24:55,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:55,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:24:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:24:55,162 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-11-03 04:24:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:55,243 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-11-03 04:24:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:24:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 [2021-11-03 04:24:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:55,245 INFO L225 Difference]: With dead ends: 126 [2021-11-03 04:24:55,245 INFO L226 Difference]: Without dead ends: 112 [2021-11-03 04:24:55,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:24:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-03 04:24:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2021-11-03 04:24:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 82 states have internal predecessors, (100), 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) [2021-11-03 04:24:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-03 04:24:55,260 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 9 [2021-11-03 04:24:55,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:55,260 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-03 04:24:55,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-11-03 04:24:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-03 04:24:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:24:55,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:55,261 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:55,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:55,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:55,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:24:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 975471712, now seen corresponding path program 1 times [2021-11-03 04:24:55,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:55,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331481504] [2021-11-03 04:24:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:55,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:55,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:55,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331481504] [2021-11-03 04:24:55,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331481504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:24:55,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768566723] [2021-11-03 04:24:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:55,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:55,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:55,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 04:24:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:24:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:55,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:55,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768566723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:55,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671966748] [2021-11-03 04:24:55,851 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 04:24:55,851 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:24:55,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:24:55,863 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:24:55,863 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:24:55,907 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:55,918 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:24:55,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:55,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:24:55,925 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:24:55,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:55,929 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:24:55,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-03 04:24:55,967 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-11-03 04:24:55,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:55,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:55,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:24:56,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:24:56,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:24:56,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:24:56,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 04:24:56,059 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,059 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:24:56,060 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,060 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:24:56,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:24:56,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:24:56,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:24:56,191 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,192 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:24:56,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 04:24:56,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,222 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 04:24:56,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:24:56,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-03 04:24:56,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,238 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 04:24:56,246 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:24:56,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 04:24:56,254 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 04:24:56,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,371 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-03 04:24:56,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-03 04:24:56,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-03 04:24:56,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:56,574 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 04:24:56,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:24:56,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:24:56,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-03 04:24:56,603 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 04:24:56,607 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:24:56,611 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-03 04:24:56,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-03 04:24:56,618 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:24:56,625 INFO L180 QuantifierPusher]: treesize reduction 89, result has 1.1 percent of original size [2021-11-03 04:24:56,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:24:56,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:56,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:24:56,632 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:24:57,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1671966748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:57,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:24:57,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 14 [2021-11-03 04:24:57,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491171868] [2021-11-03 04:24:57,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:24:57,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:24:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:24:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:24:57,156 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-11-03 04:24:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:58,415 INFO L93 Difference]: Finished difference Result 207 states and 240 transitions. [2021-11-03 04:24:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:24:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 04:24:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:58,418 INFO L225 Difference]: With dead ends: 207 [2021-11-03 04:24:58,418 INFO L226 Difference]: Without dead ends: 151 [2021-11-03 04:24:58,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:24:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-03 04:24:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 85. [2021-11-03 04:24:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 84 states have internal predecessors, (100), 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) [2021-11-03 04:24:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-11-03 04:24:58,439 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 10 [2021-11-03 04:24:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:58,440 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-11-03 04:24:58,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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) [2021-11-03 04:24:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-11-03 04:24:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:24:58,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:58,441 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:58,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:58,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:58,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:24:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash 223646754, now seen corresponding path program 1 times [2021-11-03 04:24:58,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:24:58,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229035646] [2021-11-03 04:24:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:58,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:24:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:58,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:24:58,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229035646] [2021-11-03 04:24:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229035646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:24:58,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733820257] [2021-11-03 04:24:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:58,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:58,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:58,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:58,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 04:24:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 04:24:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:59,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:59,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733820257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:59,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425469930] [2021-11-03 04:24:59,690 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 04:24:59,690 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:24:59,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:24:59,691 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:24:59,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:24:59,703 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,704 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:24:59,705 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:24:59,709 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:24:59,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:24:59,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-03 04:24:59,724 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-11-03 04:24:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:24:59,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,759 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:24:59,759 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:24:59,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:24:59,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 04:24:59,778 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:24:59,779 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,779 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:24:59,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:24:59,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:59,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:59,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:24:59,818 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:24:59,824 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,824 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:24:59,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 04:24:59,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:59,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,834 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 04:24:59,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:24:59,835 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-03 04:24:59,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 04:24:59,847 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:24:59,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 04:24:59,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 04:24:59,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:59,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:59,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:24:59,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-03 04:24:59,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-03 04:24:59,978 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:24:59,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-03 04:24:59,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:25:00,073 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 04:25:00,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:25:00,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:25:00,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:25:00,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:25:00,084 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-03 04:25:00,091 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 04:25:00,094 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:25:00,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:25:00,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:25:00,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:25:00,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-03 04:25:00,118 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.0 percent of original size [2021-11-03 04:25:00,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-03 04:25:00,128 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:25:01,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:25:01,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 04:25:01,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-03 04:25:01,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176545331] [2021-11-03 04:25:01,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 04:25:01,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:25:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 04:25:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:25:01,024 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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) [2021-11-03 04:25:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:41,078 INFO L93 Difference]: Finished difference Result 163 states and 188 transitions. [2021-11-03 04:25:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 04:25:41,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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 11 [2021-11-03 04:25:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:41,081 INFO L225 Difference]: With dead ends: 163 [2021-11-03 04:25:41,081 INFO L226 Difference]: Without dead ends: 133 [2021-11-03 04:25:41,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:25:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-03 04:25:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2021-11-03 04:25:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 1.2641509433962264) internal successors, (134), 114 states have internal predecessors, (134), 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) [2021-11-03 04:25:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2021-11-03 04:25:41,101 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 11 [2021-11-03 04:25:41,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:41,102 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2021-11-03 04:25:41,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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) [2021-11-03 04:25:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2021-11-03 04:25:41,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 04:25:41,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:41,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:41,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:41,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-03 04:25:41,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:25:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 73924353, now seen corresponding path program 1 times [2021-11-03 04:25:41,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:25:41,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044559064] [2021-11-03 04:25:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:41,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:25:41,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:25:41,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511494668] [2021-11-03 04:25:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:41,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:25:41,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:25:41,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:25:41,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 04:25:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:41,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:25:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:25:41,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:25:45,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:25:45,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044559064] [2021-11-03 04:25:45,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:25:45,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511494668] [2021-11-03 04:25:45,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511494668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:45,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:45,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:25:45,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630649547] [2021-11-03 04:25:45,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:25:45,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:25:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:25:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-03 04:25:45,578 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:08,602 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~r~0 Int) (ULTIMATE.start_main_~n~0 Int)) (= (mod (let ((.cse0 (* c_ULTIMATE.start_main_~h~0 12))) (+ (* (* (* ULTIMATE.start_main_~n~0 16) c_ULTIMATE.start_main_~p~0) c_ULTIMATE.start_main_~q~0) (* (* (* .cse0 ULTIMATE.start_main_~n~0) c_ULTIMATE.start_main_~q~0) 4294967295) (* (* c_ULTIMATE.start_main_~h~0 c_ULTIMATE.start_main_~h~0) c_ULTIMATE.start_main_~h~0) (* (* (* c_ULTIMATE.start_main_~h~0 c_ULTIMATE.start_main_~q~0) c_ULTIMATE.start_main_~q~0) 4294967295) (* (* (* (* c_ULTIMATE.start_main_~p~0 4) c_ULTIMATE.start_main_~q~0) c_ULTIMATE.start_main_~q~0) 4294967295) (* (* (* (* c_ULTIMATE.start_main_~p~0 16) c_ULTIMATE.start_main_~q~0) ULTIMATE.start_main_~r~0) 4294967295) (* (* .cse0 c_ULTIMATE.start_main_~q~0) ULTIMATE.start_main_~r~0))) 4294967296) 0)) (<= 1 c_ULTIMATE.start___VERIFIER_assert_~cond)) is different from true [2021-11-03 04:26:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:16,573 INFO L93 Difference]: Finished difference Result 157 states and 177 transitions. [2021-11-03 04:26:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:26:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 04:26:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:16,574 INFO L225 Difference]: With dead ends: 157 [2021-11-03 04:26:16,574 INFO L226 Difference]: Without dead ends: 87 [2021-11-03 04:26:16,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15, Invalid=17, Unknown=2, NotChecked=8, Total=42 [2021-11-03 04:26:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-03 04:26:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-03 04:26:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 86 states have internal predecessors, (95), 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) [2021-11-03 04:26:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-11-03 04:26:16,612 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 12 [2021-11-03 04:26:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:16,612 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-11-03 04:26:16,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-11-03 04:26:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 04:26:16,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:16,613 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:16,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:16,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-03 04:26:16,814 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:26:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1809155898, now seen corresponding path program 1 times [2021-11-03 04:26:16,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:26:16,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038118110] [2021-11-03 04:26:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:16,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:26:16,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:26:16,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30035303] [2021-11-03 04:26:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:16,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:16,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:16,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:16,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 04:26:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:26:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:17,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:17,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:26:17,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038118110] [2021-11-03 04:26:17,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:26:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30035303] [2021-11-03 04:26:17,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30035303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942915743] [2021-11-03 04:26:17,188 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 04:26:17,188 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:26:17,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:26:17,189 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:26:17,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:26:17,196 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:26:17,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,198 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:26:17,199 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:26:17,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:26:17,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-03 04:26:17,210 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 21=[|v_#valid_20|]} [2021-11-03 04:26:17,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 04:26:17,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:26:17,218 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 04:26:17,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 04:26:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 04:26:17,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:26:17,251 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 04:26:17,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 04:26:17,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:26:17,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 04:26:17,291 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:26:17,296 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,296 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 04:26:17,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 04:26:17,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,306 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 04:26:17,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 04:26:17,307 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-03 04:26:17,310 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 04:26:17,323 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 04:26:17,326 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 04:26:17,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,337 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 04:26:17,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,396 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-03 04:26:17,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,417 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-03 04:26:17,423 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 355 [2021-11-03 04:26:17,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 04:26:17,511 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 04:26:17,514 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:26:17,515 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,517 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:26:17,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,520 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-03 04:26:17,527 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 04:26:17,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:26:17,532 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-03 04:26:17,533 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-03 04:26:17,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 04:26:17,542 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-03 04:26:17,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-03 04:26:17,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:26:17,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:26:17,553 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 04:26:20,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [942915743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:20,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:26:20,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 6] total 18 [2021-11-03 04:26:20,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372171238] [2021-11-03 04:26:20,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 04:26:20,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:26:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 04:26:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:26:20,197 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) 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) [2021-11-03 04:26:29,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:29,940 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-11-03 04:26:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 04:26:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) 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) Word has length 17 [2021-11-03 04:26:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:30,093 INFO L225 Difference]: With dead ends: 95 [2021-11-03 04:26:30,093 INFO L226 Difference]: Without dead ends: 89 [2021-11-03 04:26:30,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:26:30,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-03 04:26:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-03 04:26:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 84 states have internal predecessors, (92), 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) [2021-11-03 04:26:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-11-03 04:26:30,107 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 17 [2021-11-03 04:26:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:30,107 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-11-03 04:26:30,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) 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) [2021-11-03 04:26:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-11-03 04:26:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:26:30,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:30,109 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:30,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:30,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:30,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:26:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash -802787935, now seen corresponding path program 1 times [2021-11-03 04:26:30,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:26:30,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122991462] [2021-11-03 04:26:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:30,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:26:30,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:26:30,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74353885] [2021-11-03 04:26:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:30,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:30,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:30,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:30,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:26:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:26:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:26:30,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:26:37,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:26:37,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122991462] [2021-11-03 04:26:37,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 04:26:37,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74353885] [2021-11-03 04:26:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74353885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:37,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:37,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:26:37,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111364714] [2021-11-03 04:26:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:26:37,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:26:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:26:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-03 04:26:37,297 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:55,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:55,051 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-03 04:26:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:26:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 04:26:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:55,052 INFO L225 Difference]: With dead ends: 89 [2021-11-03 04:26:55,052 INFO L226 Difference]: Without dead ends: 83 [2021-11-03 04:26:55,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:26:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-03 04:26:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-11-03 04:26:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.173913043478261) internal successors, (81), 77 states have internal predecessors, (81), 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) [2021-11-03 04:26:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-03 04:26:55,062 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 18 [2021-11-03 04:26:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:55,063 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-03 04:26:55,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-03 04:26:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-03 04:26:55,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:55,064 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:55,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-03 04:26:55,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:55,272 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 04:26:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:55,273 INFO L85 PathProgramCache]: Analyzing trace with hash 674196339, now seen corresponding path program 1 times [2021-11-03 04:26:55,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:26:55,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893421441] [2021-11-03 04:26:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:55,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:26:55,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 04:26:55,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539911976] [2021-11-03 04:26:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:55,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:55,293 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:55,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_927dd6db-7482-45e0-93af-17022fbf64ef/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process