./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa1583b531c18e8d25726690525e5ca2db800c1fca35b7cfde3a7fa11382718a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:41:53,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:41:53,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:41:53,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:41:53,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:41:53,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:41:53,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:41:53,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:41:53,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:41:53,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:41:53,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:41:53,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:41:53,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:41:53,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:41:53,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:41:53,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:41:53,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:41:53,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:41:53,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:41:53,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:41:53,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:41:53,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:41:53,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:41:53,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:41:53,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:41:53,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:41:53,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:41:53,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:41:53,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:41:53,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:41:53,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:41:53,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:41:53,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:41:53,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:41:53,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:41:53,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:41:53,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:41:53,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:41:53,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:41:53,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:41:53,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:41:53,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-25 19:41:53,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:41:53,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:41:53,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:41:53,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:41:53,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:41:53,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:41:53,619 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:41:53,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:41:53,620 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:41:53,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:41:53,621 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:41:53,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:41:53,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:41:53,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:41:53,622 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:41:53,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:41:53,622 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:41:53,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:41:53,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:41:53,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:41:53,625 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:41:53,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:41:53,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:41:53,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:41:53,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:41:53,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:41:53,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:41:53,628 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 19:41:53,628 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:41:53,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:41:53,629 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:41:53,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:41:53,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:41:53,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:41:53,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:41:53,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:41:53,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:41:53,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:41:53,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:41:53,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:41:53,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:41:53,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:41:53,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:41:53,632 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_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa1583b531c18e8d25726690525e5ca2db800c1fca35b7cfde3a7fa11382718a [2021-11-25 19:41:53,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:41:53,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:41:53,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:41:53,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:41:53,916 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:41:53,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i [2021-11-25 19:41:54,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/data/6dda622f9/a860a09d060e41049e0585a91c40e589/FLAGa339d2390 [2021-11-25 19:41:54,410 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:41:54,410 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i [2021-11-25 19:41:54,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/data/6dda622f9/a860a09d060e41049e0585a91c40e589/FLAGa339d2390 [2021-11-25 19:41:54,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/data/6dda622f9/a860a09d060e41049e0585a91c40e589 [2021-11-25 19:41:54,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:41:54,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:41:54,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:41:54,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:41:54,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:41:54,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:41:54" (1/1) ... [2021-11-25 19:41:54,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@625b5f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:54, skipping insertion in model container [2021-11-25 19:41:54,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:41:54" (1/1) ... [2021-11-25 19:41:54,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:41:54,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:41:55,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i[873,886] [2021-11-25 19:41:55,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:41:55,048 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:41:55,069 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/sv-benchmarks/c/loop-zilu/benchmark36_conjunctive.i[873,886] [2021-11-25 19:41:55,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:41:55,090 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:41:55,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55 WrapperNode [2021-11-25 19:41:55,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:41:55,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:41:55,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:41:55,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:41:55,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,130 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2021-11-25 19:41:55,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:41:55,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:41:55,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:41:55,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:41:55,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:41:55,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:41:55,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:41:55,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:41:55,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (1/1) ... [2021-11-25 19:41:55,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:41:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:55,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:41:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:41:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:41:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:41:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:41:55,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:41:55,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:41:55,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:41:55,504 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:41:55,526 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:41:55,526 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:41:55,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:55 BoogieIcfgContainer [2021-11-25 19:41:55,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:41:55,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:41:55,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:41:55,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:41:55,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:41:54" (1/3) ... [2021-11-25 19:41:55,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3191b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:41:55, skipping insertion in model container [2021-11-25 19:41:55,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:41:55" (2/3) ... [2021-11-25 19:41:55,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3191b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:41:55, skipping insertion in model container [2021-11-25 19:41:55,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:41:55" (3/3) ... [2021-11-25 19:41:55,546 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark36_conjunctive.i [2021-11-25 19:41:55,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:41:55,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 19:41:55,624 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:41:55,632 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 [2021-11-25 19:41:55,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 19:41:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:41:55,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:55,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:41:55,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2092610, now seen corresponding path program 1 times [2021-11-25 19:41:55,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:55,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932395073] [2021-11-25 19:41:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:55,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:55,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932395073] [2021-11-25 19:41:55,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932395073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:55,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:55,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:55,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542577539] [2021-11-25 19:41:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:55,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:55,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:55,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:55,902 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-11-25 19:41:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:55,973 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-25 19:41:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:41:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2021-11-25 19:41:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:55,984 INFO L225 Difference]: With dead ends: 20 [2021-11-25 19:41:55,999 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 19:41:56,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:56,006 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:56,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 19:41:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-25 19:41:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-25 19:41:56,051 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2021-11-25 19:41:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:56,052 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-25 19:41:56,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-11-25 19:41:56,053 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-25 19:41:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:41:56,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:56,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:41:56,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:41:56,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 64870960, now seen corresponding path program 1 times [2021-11-25 19:41:56,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:56,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84500420] [2021-11-25 19:41:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:56,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:56,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84500420] [2021-11-25 19:41:56,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84500420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:56,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:56,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:41:56,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822284023] [2021-11-25 19:41:56,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:56,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:56,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:56,161 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-25 19:41:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:56,196 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-11-25 19:41:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-25 19:41:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:56,198 INFO L225 Difference]: With dead ends: 13 [2021-11-25 19:41:56,198 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 19:41:56,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:56,201 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:56,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 19:41:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 19:41:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 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) [2021-11-25 19:41:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-25 19:41:56,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2021-11-25 19:41:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:56,213 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-25 19:41:56,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-25 19:41:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-25 19:41:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:41:56,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:56,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:41:56,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:41:56,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2010999812, now seen corresponding path program 1 times [2021-11-25 19:41:56,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:56,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987546516] [2021-11-25 19:41:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:56,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:56,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:56,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987546516] [2021-11-25 19:41:56,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987546516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:56,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:56,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:56,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512350893] [2021-11-25 19:41:56,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:56,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:56,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:56,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:56,280 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-11-25 19:41:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:56,304 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-11-25 19:41:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:41:56,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 [2021-11-25 19:41:56,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:56,306 INFO L225 Difference]: With dead ends: 17 [2021-11-25 19:41:56,306 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:41:56,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:56,308 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:56,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:56,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:41:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-11-25 19:41:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-25 19:41:56,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2021-11-25 19:41:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:56,314 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-25 19:41:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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) [2021-11-25 19:41:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-25 19:41:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:41:56,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:56,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:56,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:41:56,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2083515214, now seen corresponding path program 1 times [2021-11-25 19:41:56,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636176208] [2021-11-25 19:41:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:56,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:56,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636176208] [2021-11-25 19:41:56,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636176208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:41:56,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:41:56,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:41:56,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862845182] [2021-11-25 19:41:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:41:56,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:41:56,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:41:56,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:41:56,353 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:56,370 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-25 19:41:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:41:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:41:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:56,371 INFO L225 Difference]: With dead ends: 14 [2021-11-25 19:41:56,371 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 19:41:56,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:41:56,373 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:56,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 19:41:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 19:41:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-25 19:41:56,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 7 [2021-11-25 19:41:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:56,379 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-25 19:41:56,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:41:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-25 19:41:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:41:56,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:56,380 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:56,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:41:56,380 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -803359244, now seen corresponding path program 1 times [2021-11-25 19:41:56,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:56,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921007593] [2021-11-25 19:41:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:56,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:56,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:56,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921007593] [2021-11-25 19:41:56,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921007593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:41:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799599134] [2021-11-25 19:41:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:56,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:56,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:56,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:56,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:41:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:41:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:56,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799599134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474985834] [2021-11-25 19:41:56,668 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:41:56,669 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:56,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:56,708 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:56,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:57,104 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:57,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:41:57,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:41:57,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:41:57,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-25 19:41:57,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163030675] [2021-11-25 19:41:57,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:41:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:41:57,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:41:57,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:41:57,437 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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) [2021-11-25 19:41:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:57,538 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-25 19:41:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:41:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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 [2021-11-25 19:41:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:57,540 INFO L225 Difference]: With dead ends: 30 [2021-11-25 19:41:57,540 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:41:57,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:41:57,542 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:57,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:41:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-25 19:41:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 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) [2021-11-25 19:41:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-25 19:41:57,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 9 [2021-11-25 19:41:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:57,549 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-25 19:41:57,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 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) [2021-11-25 19:41:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-25 19:41:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:41:57,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:57,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:41:57,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:41:57,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:57,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:57,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:57,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1065881398, now seen corresponding path program 1 times [2021-11-25 19:41:57,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:57,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576190194] [2021-11-25 19:41:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:57,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:57,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:57,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576190194] [2021-11-25 19:41:57,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576190194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:41:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141382133] [2021-11-25 19:41:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:57,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:57,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:57,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:57,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:41:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:41:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:57,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:57,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141382133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505103776] [2021-11-25 19:41:57,976 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:41:57,976 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:57,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:57,977 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:57,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:58,301 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:58,651 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:41:58,651 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:41:58,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:41:58,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-25 19:41:58,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089138033] [2021-11-25 19:41:58,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:41:58,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:41:58,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:41:58,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:41:58,653 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-25 19:41:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:58,751 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-25 19:41:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:41:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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 [2021-11-25 19:41:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:58,753 INFO L225 Difference]: With dead ends: 30 [2021-11-25 19:41:58,753 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:41:58,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:41:58,754 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:58,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:41:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:41:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-25 19:41:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 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) [2021-11-25 19:41:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-11-25 19:41:58,763 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 11 [2021-11-25 19:41:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:58,764 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-11-25 19:41:58,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 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) [2021-11-25 19:41:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-11-25 19:41:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:41:58,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:58,767 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1] [2021-11-25 19:41:58,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:41:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:41:58,983 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:41:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 291495106, now seen corresponding path program 2 times [2021-11-25 19:41:58,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:58,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829930897] [2021-11-25 19:41:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:58,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:59,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829930897] [2021-11-25 19:41:59,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829930897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:41:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695185515] [2021-11-25 19:41:59,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:41:59,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:59,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:59,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:41:59,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:41:59,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:41:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:41:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:41:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695185515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434225842] [2021-11-25 19:41:59,398 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:41:59,398 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:59,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:59,399 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:59,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:59,640 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:59,967 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '626#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:41:59,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:41:59,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:41:59,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-25 19:41:59,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593014420] [2021-11-25 19:41:59,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:41:59,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:41:59,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:41:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:41:59,970 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 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) [2021-11-25 19:42:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:00,190 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-11-25 19:42:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:42:00,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 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) Word has length 24 [2021-11-25 19:42:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:00,192 INFO L225 Difference]: With dead ends: 63 [2021-11-25 19:42:00,192 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 19:42:00,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:42:00,194 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:00,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 19:42:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-25 19:42:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 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) [2021-11-25 19:42:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-11-25 19:42:00,203 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 24 [2021-11-25 19:42:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:00,203 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-11-25 19:42:00,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 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) [2021-11-25 19:42:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-11-25 19:42:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:42:00,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:00,205 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1] [2021-11-25 19:42:00,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:00,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:00,422 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:00,422 INFO L85 PathProgramCache]: Analyzing trace with hash 953924228, now seen corresponding path program 2 times [2021-11-25 19:42:00,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:00,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814269205] [2021-11-25 19:42:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:00,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:00,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814269205] [2021-11-25 19:42:00,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814269205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:00,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856133052] [2021-11-25 19:42:00,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:42:00,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:00,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:00,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:00,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:42:00,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:42:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:42:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:42:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:00,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:00,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856133052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:00,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410279765] [2021-11-25 19:42:00,836 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:00,836 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:00,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:00,837 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:00,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:01,047 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:01,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '966#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:01,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:01,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:01,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-25 19:42:01,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199774052] [2021-11-25 19:42:01,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:01,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:42:01,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:42:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:42:01,358 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 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) [2021-11-25 19:42:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:01,588 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-11-25 19:42:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:42:01,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 19:42:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:01,590 INFO L225 Difference]: With dead ends: 60 [2021-11-25 19:42:01,590 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 19:42:01,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:42:01,592 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:01,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 36 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 19:42:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-11-25 19:42:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 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) [2021-11-25 19:42:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-11-25 19:42:01,599 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 26 [2021-11-25 19:42:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:01,600 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-11-25 19:42:01,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 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) [2021-11-25 19:42:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-11-25 19:42:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:42:01,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:01,602 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1] [2021-11-25 19:42:01,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 19:42:01,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:01,803 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1862645118, now seen corresponding path program 3 times [2021-11-25 19:42:01,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:01,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422444516] [2021-11-25 19:42:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:01,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:02,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422444516] [2021-11-25 19:42:02,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422444516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102102337] [2021-11-25 19:42:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:42:02,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:02,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:02,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:42:02,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:42:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:42:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:42:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:02,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:02,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102102337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:02,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372899521] [2021-11-25 19:42:02,921 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:02,921 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:02,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:02,922 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:02,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:03,112 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:03,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1497#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:03,493 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:03,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:03,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-25 19:42:03,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609818245] [2021-11-25 19:42:03,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:03,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 19:42:03,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 19:42:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2187, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:42:03,497 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 states have internal predecessors, (107), 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) [2021-11-25 19:42:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:04,062 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-11-25 19:42:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 19:42:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 states have internal predecessors, (107), 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 54 [2021-11-25 19:42:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:04,064 INFO L225 Difference]: With dead ends: 129 [2021-11-25 19:42:04,064 INFO L226 Difference]: Without dead ends: 128 [2021-11-25 19:42:04,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1350, Invalid=4200, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 19:42:04,067 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 213 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:04,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 88 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-25 19:42:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-25 19:42:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 115 states have internal predecessors, (127), 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) [2021-11-25 19:42:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2021-11-25 19:42:04,079 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 54 [2021-11-25 19:42:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2021-11-25 19:42:04,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 46 states have internal predecessors, (107), 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) [2021-11-25 19:42:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2021-11-25 19:42:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:42:04,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:04,082 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1] [2021-11-25 19:42:04,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:04,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:04,310 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash 999405636, now seen corresponding path program 3 times [2021-11-25 19:42:04,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:04,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050391385] [2021-11-25 19:42:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:04,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:04,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050391385] [2021-11-25 19:42:04,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050391385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433371080] [2021-11-25 19:42:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:42:04,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:04,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:04,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:42:04,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:42:04,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:42:04,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:42:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:04,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:05,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433371080] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:05,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052077100] [2021-11-25 19:42:05,476 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:05,476 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:05,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:05,477 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:05,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:05,665 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:05,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2215#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:05,983 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:05,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:05,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-25 19:42:05,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111804763] [2021-11-25 19:42:05,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:05,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 19:42:05,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:05,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 19:42:05,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=2186, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:42:05,987 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 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) [2021-11-25 19:42:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:06,563 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2021-11-25 19:42:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 19:42:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 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 56 [2021-11-25 19:42:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:06,565 INFO L225 Difference]: With dead ends: 120 [2021-11-25 19:42:06,565 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 19:42:06,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1352, Invalid=4198, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 19:42:06,569 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:06,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 88 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:42:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 19:42:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-11-25 19:42:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 117 states have internal predecessors, (118), 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) [2021-11-25 19:42:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-11-25 19:42:06,580 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 56 [2021-11-25 19:42:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:06,580 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-11-25 19:42:06,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 46 states have internal predecessors, (111), 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) [2021-11-25 19:42:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-11-25 19:42:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 19:42:06,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:06,586 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1] [2021-11-25 19:42:06,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:06,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:06,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1927842302, now seen corresponding path program 4 times [2021-11-25 19:42:06,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:06,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100272205] [2021-11-25 19:42:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:06,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:07,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100272205] [2021-11-25 19:42:07,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100272205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112468821] [2021-11-25 19:42:07,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:42:07,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:07,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:07,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:07,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:42:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:42:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:07,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:09,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112468821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:09,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260938900] [2021-11-25 19:42:09,962 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:09,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:09,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:09,964 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:09,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:10,142 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:10,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3322#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:10,551 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:10,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:10,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-25 19:42:10,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844484519] [2021-11-25 19:42:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:10,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-25 19:42:10,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-25 19:42:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2273, Invalid=7827, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:42:10,559 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 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) [2021-11-25 19:42:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:12,110 INFO L93 Difference]: Finished difference Result 261 states and 284 transitions. [2021-11-25 19:42:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-25 19:42:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 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 114 [2021-11-25 19:42:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:12,115 INFO L225 Difference]: With dead ends: 261 [2021-11-25 19:42:12,115 INFO L226 Difference]: Without dead ends: 260 [2021-11-25 19:42:12,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5040 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5562, Invalid=15900, Unknown=0, NotChecked=0, Total=21462 [2021-11-25 19:42:12,124 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 494 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:12,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 135 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:42:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-25 19:42:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2021-11-25 19:42:12,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 234 states have (on average 1.106837606837607) internal successors, (259), 235 states have internal predecessors, (259), 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) [2021-11-25 19:42:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 259 transitions. [2021-11-25 19:42:12,142 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 259 transitions. Word has length 114 [2021-11-25 19:42:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:12,143 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 259 transitions. [2021-11-25 19:42:12,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4408602150537635) internal successors, (227), 94 states have internal predecessors, (227), 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) [2021-11-25 19:42:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 259 transitions. [2021-11-25 19:42:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 19:42:12,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:12,146 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1] [2021-11-25 19:42:12,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:12,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:42:12,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1525546044, now seen corresponding path program 4 times [2021-11-25 19:42:12,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:12,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321643391] [2021-11-25 19:42:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:12,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:13,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321643391] [2021-11-25 19:42:13,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321643391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529076939] [2021-11-25 19:42:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:42:13,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:13,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:13,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:42:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 19:42:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:13,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:15,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529076939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485751494] [2021-11-25 19:42:15,231 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:15,231 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:15,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:15,232 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:15,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:15,419 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:15,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4796#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:15,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:15,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:15,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-25 19:42:15,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411544395] [2021-11-25 19:42:15,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-25 19:42:15,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-25 19:42:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2274, Invalid=7826, Unknown=0, NotChecked=0, Total=10100 [2021-11-25 19:42:15,811 INFO L87 Difference]: Start difference. First operand 236 states and 259 transitions. Second operand has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 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) [2021-11-25 19:42:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:17,312 INFO L93 Difference]: Finished difference Result 240 states and 263 transitions. [2021-11-25 19:42:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-25 19:42:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 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 116 [2021-11-25 19:42:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:17,314 INFO L225 Difference]: With dead ends: 240 [2021-11-25 19:42:17,315 INFO L226 Difference]: Without dead ends: 239 [2021-11-25 19:42:17,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5037 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5564, Invalid=15898, Unknown=0, NotChecked=0, Total=21462 [2021-11-25 19:42:17,317 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 326 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:17,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 130 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:42:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-25 19:42:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2021-11-25 19:42:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 237 states have internal predecessors, (238), 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) [2021-11-25 19:42:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2021-11-25 19:42:17,343 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 116 [2021-11-25 19:42:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2021-11-25 19:42:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4838709677419355) internal successors, (231), 94 states have internal predecessors, (231), 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) [2021-11-25 19:42:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2021-11-25 19:42:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-25 19:42:17,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:17,350 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1] [2021-11-25 19:42:17,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:17,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:42:17,571 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 33754370, now seen corresponding path program 5 times [2021-11-25 19:42:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063103963] [2021-11-25 19:42:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:17,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:20,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:20,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063103963] [2021-11-25 19:42:20,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063103963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:20,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833604400] [2021-11-25 19:42:20,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:42:20,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:20,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:20,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:42:20,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:42:20,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:42:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 19:42:20,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:21,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:27,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833604400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714097856] [2021-11-25 19:42:27,286 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:27,286 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:27,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:27,287 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:27,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:27,452 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:28,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7055#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:28,008 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:28,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:28,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-25 19:42:28,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586305891] [2021-11-25 19:42:28,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:28,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-25 19:42:28,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-25 19:42:28,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9137, Invalid=29475, Unknown=0, NotChecked=0, Total=38612 [2021-11-25 19:42:28,018 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 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) [2021-11-25 19:42:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:33,661 INFO L93 Difference]: Finished difference Result 525 states and 572 transitions. [2021-11-25 19:42:33,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-25 19:42:33,662 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 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 234 [2021-11-25 19:42:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:33,665 INFO L225 Difference]: With dead ends: 525 [2021-11-25 19:42:33,665 INFO L226 Difference]: Without dead ends: 524 [2021-11-25 19:42:33,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19344 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=22626, Invalid=61764, Unknown=0, NotChecked=0, Total=84390 [2021-11-25 19:42:33,672 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1028 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:33,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1028 Valid, 275 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:42:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-25 19:42:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 476. [2021-11-25 19:42:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 475 states have internal predecessors, (523), 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) [2021-11-25 19:42:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 523 transitions. [2021-11-25 19:42:33,690 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 523 transitions. Word has length 234 [2021-11-25 19:42:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:33,691 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 523 transitions. [2021-11-25 19:42:33,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.4708994708994707) internal successors, (467), 190 states have internal predecessors, (467), 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) [2021-11-25 19:42:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 523 transitions. [2021-11-25 19:42:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-25 19:42:33,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:33,697 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1] [2021-11-25 19:42:33,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:33,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:42:33,911 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:33,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1921787196, now seen corresponding path program 5 times [2021-11-25 19:42:33,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:33,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634946056] [2021-11-25 19:42:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:33,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:42:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:36,581 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:42:36,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634946056] [2021-11-25 19:42:36,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634946056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:42:36,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748452551] [2021-11-25 19:42:36,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:42:36,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:36,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:36,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:36,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:42:36,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:42:36,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:42:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-25 19:42:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:42:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:37,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:42:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:42:43,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748452551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:42:43,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182336738] [2021-11-25 19:42:43,601 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:42:43,601 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:42:43,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:42:43,626 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:42:43,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:42:43,776 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:44,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10041#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:44,338 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:44,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:42:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-25 19:42:44,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725681113] [2021-11-25 19:42:44,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:44,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-25 19:42:44,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-25 19:42:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9138, Invalid=29474, Unknown=0, NotChecked=0, Total=38612 [2021-11-25 19:42:44,343 INFO L87 Difference]: Start difference. First operand 476 states and 523 transitions. Second operand has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 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) [2021-11-25 19:42:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:49,858 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2021-11-25 19:42:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-25 19:42:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 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 236 [2021-11-25 19:42:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:49,861 INFO L225 Difference]: With dead ends: 480 [2021-11-25 19:42:49,861 INFO L226 Difference]: Without dead ends: 479 [2021-11-25 19:42:49,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19341 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=22628, Invalid=61762, Unknown=0, NotChecked=0, Total=84390 [2021-11-25 19:42:49,868 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 893 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:49,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 218 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:42:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-25 19:42:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2021-11-25 19:42:49,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 476 states have (on average 1.004201680672269) internal successors, (478), 477 states have internal predecessors, (478), 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) [2021-11-25 19:42:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2021-11-25 19:42:49,885 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 236 [2021-11-25 19:42:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:49,886 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2021-11-25 19:42:49,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.492063492063492) internal successors, (471), 190 states have internal predecessors, (471), 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) [2021-11-25 19:42:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2021-11-25 19:42:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-25 19:42:49,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:49,897 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1] [2021-11-25 19:42:49,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:50,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:50,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:42:50,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1625343230, now seen corresponding path program 6 times [2021-11-25 19:42:50,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:50,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083620810] [2021-11-25 19:42:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:50,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:43:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:00,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:43:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083620810] [2021-11-25 19:43:00,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083620810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:43:00,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159979295] [2021-11-25 19:43:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:43:00,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:43:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:43:00,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:43:00,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:43:00,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:43:00,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:43:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 19:43:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:43:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:01,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:43:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:43:24,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159979295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:43:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25999242] [2021-11-25 19:43:24,694 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:43:24,695 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:43:24,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:43:24,695 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:43:24,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:43:24,871 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:43:25,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14604#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:43:25,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:43:25,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:43:25,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-25 19:43:25,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766507569] [2021-11-25 19:43:25,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:43:25,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-25 19:43:25,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:43:25,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-25 19:43:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36689, Invalid=114243, Unknown=0, NotChecked=0, Total=150932 [2021-11-25 19:43:25,946 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 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) [2021-11-25 19:43:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:43:55,239 INFO L93 Difference]: Finished difference Result 1053 states and 1148 transitions. [2021-11-25 19:43:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-25 19:43:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 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 474 [2021-11-25 19:43:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:43:55,247 INFO L225 Difference]: With dead ends: 1053 [2021-11-25 19:43:55,247 INFO L226 Difference]: Without dead ends: 1052 [2021-11-25 19:43:55,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1801 GetRequests, 1224 SyntacticMatches, 0 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75600 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=91314, Invalid=243348, Unknown=0, NotChecked=0, Total=334662 [2021-11-25 19:43:55,268 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 2452 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:43:55,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2452 Valid, 519 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:43:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-25 19:43:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 956. [2021-11-25 19:43:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 954 states have (on average 1.10167714884696) internal successors, (1051), 955 states have internal predecessors, (1051), 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) [2021-11-25 19:43:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1051 transitions. [2021-11-25 19:43:55,300 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1051 transitions. Word has length 474 [2021-11-25 19:43:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:43:55,302 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1051 transitions. [2021-11-25 19:43:55,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.4855643044619424) internal successors, (947), 382 states have internal predecessors, (947), 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) [2021-11-25 19:43:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1051 transitions. [2021-11-25 19:43:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-25 19:43:55,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:43:55,314 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1] [2021-11-25 19:43:55,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 19:43:55,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:43:55,600 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:43:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:43:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1413253316, now seen corresponding path program 6 times [2021-11-25 19:43:55,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:43:55,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674641538] [2021-11-25 19:43:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:43:55,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:43:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:44:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:05,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:44:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674641538] [2021-11-25 19:44:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674641538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:44:05,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325987464] [2021-11-25 19:44:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:44:05,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:44:05,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:44:05,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:44:05,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:44:06,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:44:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:44:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-25 19:44:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:44:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:07,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:44:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:44:32,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325987464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:44:32,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461289304] [2021-11-25 19:44:32,125 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:44:32,125 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:44:32,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:44:32,126 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:44:32,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:44:32,299 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:44:33,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20614#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~y~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:44:33,472 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:44:33,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:44:33,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-25 19:44:33,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455541174] [2021-11-25 19:44:33,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:44:33,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-25 19:44:33,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:44:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-25 19:44:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36690, Invalid=114242, Unknown=0, NotChecked=0, Total=150932 [2021-11-25 19:44:33,496 INFO L87 Difference]: Start difference. First operand 956 states and 1051 transitions. Second operand has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 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) [2021-11-25 19:45:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:45:02,873 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2021-11-25 19:45:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-25 19:45:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 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 476 [2021-11-25 19:45:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:45:02,881 INFO L225 Difference]: With dead ends: 960 [2021-11-25 19:45:02,881 INFO L226 Difference]: Without dead ends: 959 [2021-11-25 19:45:02,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1807 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75597 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=91316, Invalid=243346, Unknown=0, NotChecked=0, Total=334662 [2021-11-25 19:45:02,903 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1822 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:45:02,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1822 Valid, 442 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:45:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-25 19:45:02,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2021-11-25 19:45:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 956 states have (on average 1.002092050209205) internal successors, (958), 957 states have internal predecessors, (958), 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) [2021-11-25 19:45:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2021-11-25 19:45:02,933 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 476 [2021-11-25 19:45:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:45:02,934 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2021-11-25 19:45:02,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.4960629921259843) internal successors, (951), 382 states have internal predecessors, (951), 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) [2021-11-25 19:45:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2021-11-25 19:45:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2021-11-25 19:45:02,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:45:02,945 INFO L514 BasicCegarLoop]: trace histogram [191, 190, 190, 190, 190, 1, 1, 1] [2021-11-25 19:45:02,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 19:45:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:45:03,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:45:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:45:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 711694082, now seen corresponding path program 7 times [2021-11-25 19:45:03,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:45:03,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179966195] [2021-11-25 19:45:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:45:03,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:45:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:45:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:45:40,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:45:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179966195] [2021-11-25 19:45:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179966195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:45:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100313076] [2021-11-25 19:45:40,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:45:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:45:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:45:40,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:45:40,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:45:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:45:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 2503 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-25 19:45:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:45:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:45:43,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 90155 backedges. 0 proven. 90155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:17,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100313076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:17,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889340378] [2021-11-25 19:47:17,818 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 19:47:17,818 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:17,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:17,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:17,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:17,961 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:19,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29785#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (< 2147483646 |ULTIMATE.start_main_#t~post4#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:19,589 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:19,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:47:19,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2021-11-25 19:47:19,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108337857] [2021-11-25 19:47:19,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:19,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2021-11-25 19:47:19,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2021-11-25 19:47:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147089, Invalid=449667, Unknown=0, NotChecked=0, Total=596756 [2021-11-25 19:47:19,653 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 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) [2021-11-25 19:51:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:08,826 INFO L93 Difference]: Finished difference Result 2109 states and 2300 transitions. [2021-11-25 19:51:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 767 states. [2021-11-25 19:51:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 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 954 [2021-11-25 19:51:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:08,839 INFO L225 Difference]: With dead ends: 2109 [2021-11-25 19:51:08,839 INFO L226 Difference]: Without dead ends: 2108 [2021-11-25 19:51:08,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3625 GetRequests, 2472 SyntacticMatches, 0 SemanticMatches, 1153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298704 ImplicationChecksByTransitivity, 196.8s TimeCoverageRelationStatistics Valid=366930, Invalid=965940, Unknown=0, NotChecked=0, Total=1332870 [2021-11-25 19:51:08,917 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7165 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7165 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:08,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7165 Valid, 1017 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 19:51:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-11-25 19:51:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1916. [2021-11-25 19:51:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1914 states have (on average 1.100835945663532) internal successors, (2107), 1915 states have internal predecessors, (2107), 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) [2021-11-25 19:51:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2107 transitions. [2021-11-25 19:51:08,970 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2107 transitions. Word has length 954 [2021-11-25 19:51:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:08,972 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2107 transitions. [2021-11-25 19:51:08,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.49281045751634) internal successors, (1907), 766 states have internal predecessors, (1907), 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) [2021-11-25 19:51:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2107 transitions. [2021-11-25 19:51:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2021-11-25 19:51:08,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:08,984 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1] [2021-11-25 19:51:09,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:09,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:51:09,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 19:51:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1038214340, now seen corresponding path program 7 times [2021-11-25 19:51:09,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:09,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176427922] [2021-11-25 19:51:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:09,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:46,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:46,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176427922] [2021-11-25 19:51:46,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176427922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:46,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259996015] [2021-11-25 19:51:46,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:51:46,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:46,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:46,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9821e829-e99a-41c9-b890-197cbcfe15e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:51:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 383 conjunts are in the unsatisfiable core [2021-11-25 19:51:46,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:48,744 INFO L328 TraceCheckSpWp]: Computing backward predicates...