./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/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_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/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 64bit --witnessprinter.graph.data.programhash 45cf92b0c6fea336569aa3c590b09eca22523fff4b1b234a5534ea2e1e74fe84 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:27:56,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:27:56,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:27:56,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:27:56,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:27:56,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:27:56,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:27:56,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:27:56,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:27:56,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:27:56,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:27:56,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:27:56,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:27:56,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:27:56,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:27:56,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:27:56,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:27:56,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:27:56,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:27:56,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:27:56,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:27:56,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:27:56,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:27:56,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:27:56,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:27:56,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:27:56,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:27:56,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:27:56,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:27:56,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:27:56,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:27:56,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:27:56,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:27:57,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:27:57,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:27:57,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:27:57,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:27:57,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:27:57,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:27:57,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:27:57,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:27:57,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 19:27:57,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:27:57,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:27:57,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:27:57,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:27:57,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:27:57,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:27:57,045 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:27:57,045 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:27:57,046 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:27:57,046 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:27:57,047 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:27:57,047 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:27:57,047 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:27:57,047 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:27:57,048 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:27:57,048 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:27:57,048 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:27:57,048 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:27:57,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:27:57,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:27:57,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:27:57,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:27:57,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:27:57,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:27:57,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:27:57,051 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 19:27:57,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:27:57,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:27:57,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:27:57,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:27:57,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:27:57,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:27:57,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:27:57,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:27:57,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:27:57,055 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:27:57,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:27:57,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:27:57,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:27:57,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:27:57,056 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_89536d78-574a-47be-8c91-6eee2df5fd0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cf92b0c6fea336569aa3c590b09eca22523fff4b1b234a5534ea2e1e74fe84 [2021-11-25 19:27:57,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:27:57,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:27:57,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:27:57,356 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:27:57,357 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:27:57,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c [2021-11-25 19:27:57,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/data/b92760203/81dc17ea84fd46aaa10ac9063f93595c/FLAG4182d40e3 [2021-11-25 19:27:57,909 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:27:57,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/sv-benchmarks/c/termination-crafted/NonTerminationSimple4.c [2021-11-25 19:27:57,922 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/data/b92760203/81dc17ea84fd46aaa10ac9063f93595c/FLAG4182d40e3 [2021-11-25 19:27:58,290 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/data/b92760203/81dc17ea84fd46aaa10ac9063f93595c [2021-11-25 19:27:58,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:27:58,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:27:58,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:27:58,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:27:58,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:27:58,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1584219c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58, skipping insertion in model container [2021-11-25 19:27:58,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:27:58,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:27:58,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:27:58,523 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:27:58,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:27:58,547 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:27:58,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58 WrapperNode [2021-11-25 19:27:58,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:27:58,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:27:58,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:27:58,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:27:58,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,575 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-11-25 19:27:58,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:27:58,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:27:58,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:27:58,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:27:58,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:27:58,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:27:58,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:27:58,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:27:58,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (1/1) ... [2021-11-25 19:27:58,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:27:58,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:27:58,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:27:58,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:27:58,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:27:58,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:27:58,761 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:27:58,762 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:27:58,850 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:27:58,867 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:27:58,867 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:27:58,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:27:58 BoogieIcfgContainer [2021-11-25 19:27:58,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:27:58,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:27:58,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:27:58,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:27:58,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:27:58" (1/3) ... [2021-11-25 19:27:58,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f87f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:27:58, skipping insertion in model container [2021-11-25 19:27:58,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:27:58" (2/3) ... [2021-11-25 19:27:58,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f87f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:27:58, skipping insertion in model container [2021-11-25 19:27:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:27:58" (3/3) ... [2021-11-25 19:27:58,879 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTerminationSimple4.c [2021-11-25 19:27:58,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:27:58,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 19:27:58,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:27:58,945 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 19:27:58,945 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 19:27:58,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:27:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:27:58,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:27:58,965 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:27:58,965 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:27:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:27:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1822505, now seen corresponding path program 1 times [2021-11-25 19:27:58,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:27:58,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978272903] [2021-11-25 19:27:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:27:58,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:27:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:27:59,106 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 19:27:59,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:27:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978272903] [2021-11-25 19:27:59,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978272903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:27:59,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:27:59,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 19:27:59,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235429809] [2021-11-25 19:27:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:27:59,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:27:59,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:27:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:27:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:27:59,161 INFO L87 Difference]: Start difference. First operand has 9 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 19:27:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:27:59,192 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2021-11-25 19:27:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:27:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 19:27:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:27:59,202 INFO L225 Difference]: With dead ends: 9 [2021-11-25 19:27:59,202 INFO L226 Difference]: Without dead ends: 6 [2021-11-25 19:27:59,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:27:59,234 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1 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 19:27:59,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:27:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-25 19:27:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-25 19:27:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 19:27:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-25 19:27:59,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-25 19:27:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:27:59,294 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-25 19:27:59,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 19:27:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-25 19:27:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:27:59,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:27:59,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:27:59,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:27:59,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:27:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:27:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash 56497703, now seen corresponding path program 1 times [2021-11-25 19:27:59,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:27:59,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297866061] [2021-11-25 19:27:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:27:59,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:27:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:27:59,339 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 19:27:59,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:27:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297866061] [2021-11-25 19:27:59,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297866061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:27:59,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:27:59,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:27:59,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964822626] [2021-11-25 19:27:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:27:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:27:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:27:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:27:59,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:27:59,345 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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 19:27:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:27:59,358 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-11-25 19:27:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:27:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 19:27:59,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:27:59,360 INFO L225 Difference]: With dead ends: 10 [2021-11-25 19:27:59,360 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 19:27:59,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:27:59,363 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:27:59,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:27:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 19:27:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 19:27:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:27:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-25 19:27:59,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-25 19:27:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:27:59,376 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-25 19:27:59,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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 19:27:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-25 19:27:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:27:59,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:27:59,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-11-25 19:27:59,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:27:59,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:27:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:27:59,383 INFO L85 PathProgramCache]: Analyzing trace with hash -504066201, now seen corresponding path program 1 times [2021-11-25 19:27:59,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:27:59,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13932835] [2021-11-25 19:27:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:27:59,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:27:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:27:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:27:59,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:27:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13932835] [2021-11-25 19:27:59,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13932835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:27:59,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167010591] [2021-11-25 19:27:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:27:59,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:27:59,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:27:59,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:27:59,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:27:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:27:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:27:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:27:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:27:59,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:27:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:27:59,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167010591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:27:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240638551] [2021-11-25 19:27:59,615 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:27:59,615 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:27:59,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:27:59,630 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:27:59,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:27:59,833 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:27:59,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '107#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:27:59,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:27:59,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:27:59,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-25 19:27:59,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294750334] [2021-11-25 19:27:59,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:27:59,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:27:59,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:27:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:27:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:27:59,903 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:27:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:27:59,940 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-25 19:27:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:27:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:27:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:27:59,941 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:27:59,941 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:27:59,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:27:59,944 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:27:59,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:27:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:27:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 19:27:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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 19:27:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-11-25 19:27:59,953 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2021-11-25 19:27:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:27:59,955 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-11-25 19:27:59,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:27:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-11-25 19:27:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:27:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:27:59,956 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2021-11-25 19:27:59,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:00,157 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:28:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1084160473, now seen corresponding path program 2 times [2021-11-25 19:28:00,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:00,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266187620] [2021-11-25 19:28:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:00,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:00,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:00,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266187620] [2021-11-25 19:28:00,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266187620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:00,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205452860] [2021-11-25 19:28:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:28:00,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:00,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:00,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:28:00,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:28:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:28:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:28:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:28:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:00,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205452860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:28:00,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352536830] [2021-11-25 19:28:00,561 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:28:00,562 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:28:00,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:28:00,562 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:28:00,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:28:00,609 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:28:00,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '266#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:28:00,674 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:28:00,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:28:00,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-25 19:28:00,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117822344] [2021-11-25 19:28:00,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:28:00,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:28:00,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:28:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:28:00,681 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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 19:28:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:00,750 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-25 19:28:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:28:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 19:28:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:00,754 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:28:00,754 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 19:28:00,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:28:00,758 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:00,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:28:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 19:28:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-25 19:28:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:28:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-11-25 19:28:00,780 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 17 [2021-11-25 19:28:00,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:00,781 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-11-25 19:28:00,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 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 19:28:00,781 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-11-25 19:28:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:28:00,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:00,783 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1] [2021-11-25 19:28:00,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:01,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:01,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:28:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash -269324761, now seen corresponding path program 3 times [2021-11-25 19:28:01,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799937676] [2021-11-25 19:28:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:01,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:01,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799937676] [2021-11-25 19:28:01,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799937676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963783004] [2021-11-25 19:28:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:28:01,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:01,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:01,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:28:01,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:28:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:28:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:28:01,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:01,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:28:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:01,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963783004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:28:01,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430427108] [2021-11-25 19:28:01,707 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:28:01,708 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:28:01,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:28:01,708 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:28:01,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:28:01,753 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:28:01,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '593#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:28:01,836 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:28:01,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:28:01,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-25 19:28:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637178335] [2021-11-25 19:28:01,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:28:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:28:01,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:28:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:28:01,843 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 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 19:28:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:01,921 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-11-25 19:28:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:28:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 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 35 [2021-11-25 19:28:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:01,923 INFO L225 Difference]: With dead ends: 73 [2021-11-25 19:28:01,923 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 19:28:01,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:28:01,925 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:01,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:28:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 19:28:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-25 19:28:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 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 19:28:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-11-25 19:28:01,935 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 35 [2021-11-25 19:28:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:01,935 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-11-25 19:28:01,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 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 19:28:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-11-25 19:28:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 19:28:01,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:01,938 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1] [2021-11-25 19:28:01,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:02,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:02,161 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:28:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash -537444825, now seen corresponding path program 4 times [2021-11-25 19:28:02,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510589446] [2021-11-25 19:28:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:02,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:02,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:02,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510589446] [2021-11-25 19:28:02,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510589446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:02,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26934509] [2021-11-25 19:28:02,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:28:02,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:02,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:02,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:02,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:28:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:28:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:28:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:03,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26934509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:28:03,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1864000533] [2021-11-25 19:28:03,782 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:28:03,782 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:28:03,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:28:03,782 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:28:03,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:28:03,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:28:03,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1256#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:28:03,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:28:03,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:28:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-25 19:28:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804710823] [2021-11-25 19:28:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:28:03,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 19:28:03,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 19:28:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1138, Invalid=1514, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:28:03,968 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 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 19:28:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:04,174 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2021-11-25 19:28:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 19:28:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 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 71 [2021-11-25 19:28:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:04,182 INFO L225 Difference]: With dead ends: 145 [2021-11-25 19:28:04,185 INFO L226 Difference]: Without dead ends: 144 [2021-11-25 19:28:04,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1138, Invalid=1514, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:28:04,189 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:04,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:28:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-25 19:28:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-11-25 19:28:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 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 19:28:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2021-11-25 19:28:04,223 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 71 [2021-11-25 19:28:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2021-11-25 19:28:04,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 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 19:28:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2021-11-25 19:28:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 19:28:04,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:04,233 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1] [2021-11-25 19:28:04,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:04,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:28:04,449 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:28:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:04,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1316430297, now seen corresponding path program 5 times [2021-11-25 19:28:04,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:04,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350224862] [2021-11-25 19:28:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:04,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:05,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350224862] [2021-11-25 19:28:05,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350224862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:05,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441146780] [2021-11-25 19:28:05,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:28:05,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:05,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:05,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:05,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:28:05,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 19:28:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:28:05,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:28:05,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:06,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:28:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441146780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:28:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703575009] [2021-11-25 19:28:09,275 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:28:09,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:28:09,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:28:09,276 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:28:09,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:28:09,316 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:28:09,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2591#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:28:09,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:28:09,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:28:09,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-11-25 19:28:09,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99554433] [2021-11-25 19:28:09,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:28:09,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-25 19:28:09,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-25 19:28:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4570, Invalid=5330, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 19:28:09,481 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 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 19:28:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:09,987 INFO L93 Difference]: Finished difference Result 289 states and 336 transitions. [2021-11-25 19:28:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 19:28:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 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 143 [2021-11-25 19:28:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:09,991 INFO L225 Difference]: With dead ends: 289 [2021-11-25 19:28:09,991 INFO L226 Difference]: Without dead ends: 288 [2021-11-25 19:28:09,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4570, Invalid=5330, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 19:28:09,997 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:09,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:28:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-25 19:28:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-11-25 19:28:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0034843205574913) internal successors, (288), 287 states have internal predecessors, (288), 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 19:28:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2021-11-25 19:28:10,017 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 143 [2021-11-25 19:28:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:10,018 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2021-11-25 19:28:10,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 3.0) internal successors, (285), 96 states have internal predecessors, (285), 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 19:28:10,019 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2021-11-25 19:28:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-25 19:28:10,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:10,025 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 1, 1, 1] [2021-11-25 19:28:10,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:10,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:28:10,253 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:28:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash -892592601, now seen corresponding path program 6 times [2021-11-25 19:28:10,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:10,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760823271] [2021-11-25 19:28:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:10,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:14,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:14,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760823271] [2021-11-25 19:28:14,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760823271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:14,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078999241] [2021-11-25 19:28:14,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:28:14,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:14,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:14,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:28:14,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:28:14,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:28:14,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 19:28:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:14,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:28:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 13395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:24,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078999241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:28:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938863536] [2021-11-25 19:28:24,681 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:28:24,682 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:28:24,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:28:24,682 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:28:24,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:28:24,719 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:28:24,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5270#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:28:24,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:28:24,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:28:24,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-11-25 19:28:24,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160975999] [2021-11-25 19:28:24,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:28:24,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-25 19:28:24,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-25 19:28:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2021-11-25 19:28:24,988 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 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 19:28:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:26,719 INFO L93 Difference]: Finished difference Result 577 states and 672 transitions. [2021-11-25 19:28:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-25 19:28:26,721 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 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 287 [2021-11-25 19:28:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:26,729 INFO L225 Difference]: With dead ends: 577 [2021-11-25 19:28:26,729 INFO L226 Difference]: Without dead ends: 576 [2021-11-25 19:28:26,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=18346, Invalid=19874, Unknown=0, NotChecked=0, Total=38220 [2021-11-25 19:28:26,735 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:26,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 193 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:28:26,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-25 19:28:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-25 19:28:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.0017391304347827) internal successors, (576), 575 states have internal predecessors, (576), 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 19:28:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 576 transitions. [2021-11-25 19:28:26,771 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 576 transitions. Word has length 287 [2021-11-25 19:28:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:26,773 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 576 transitions. [2021-11-25 19:28:26,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 3.0) internal successors, (573), 192 states have internal predecessors, (573), 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 19:28:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 576 transitions. [2021-11-25 19:28:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-11-25 19:28:26,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:26,796 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 190, 1, 1, 1] [2021-11-25 19:28:26,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:27,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:27,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:28:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1439866407, now seen corresponding path program 7 times [2021-11-25 19:28:27,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:27,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805970399] [2021-11-25 19:28:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:27,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:40,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805970399] [2021-11-25 19:28:40,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805970399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137210417] [2021-11-25 19:28:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:28:40,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:40,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:40,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:28:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 19:28:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:28:41,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:29:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 54435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:29:19,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137210417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:29:19,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268003078] [2021-11-25 19:29:19,026 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:29:19,026 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:29:19,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:29:19,027 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:29:19,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:29:19,074 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:29:19,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10637#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:29:19,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:29:19,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:29:19,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-11-25 19:29:19,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402640672] [2021-11-25 19:29:19,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:29:19,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-25 19:29:19,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-25 19:29:19,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73546, Invalid=76610, Unknown=0, NotChecked=0, Total=150156 [2021-11-25 19:29:19,516 INFO L87 Difference]: Start difference. First operand 576 states and 576 transitions. Second operand has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 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 19:29:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:25,166 INFO L93 Difference]: Finished difference Result 1153 states and 1344 transitions. [2021-11-25 19:29:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-25 19:29:25,167 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 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 575 [2021-11-25 19:29:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:25,175 INFO L225 Difference]: With dead ends: 1153 [2021-11-25 19:29:25,175 INFO L226 Difference]: Without dead ends: 1152 [2021-11-25 19:29:25,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1915 GetRequests, 1529 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=73546, Invalid=76610, Unknown=0, NotChecked=0, Total=150156 [2021-11-25 19:29:25,189 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:25,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:29:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-11-25 19:29:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2021-11-25 19:29:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.000868809730669) internal successors, (1152), 1151 states have internal predecessors, (1152), 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 19:29:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1152 transitions. [2021-11-25 19:29:25,230 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1152 transitions. Word has length 575 [2021-11-25 19:29:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:25,231 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1152 transitions. [2021-11-25 19:29:25,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 3.0) internal successors, (1149), 384 states have internal predecessors, (1149), 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 19:29:25,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1152 transitions. [2021-11-25 19:29:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2021-11-25 19:29:25,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:25,286 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 382, 1, 1, 1] [2021-11-25 19:29:25,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:29:25,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:25,493 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:29:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash -840983001, now seen corresponding path program 8 times [2021-11-25 19:29:25,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:25,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532092427] [2021-11-25 19:29:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:25,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:17,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532092427] [2021-11-25 19:30:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532092427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93884303] [2021-11-25 19:30:17,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:30:17,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:17,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:18,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:30:19,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 383 check-sat command(s) [2021-11-25 19:30:19,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-25 19:30:19,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:30:22,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 219459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:33:03,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93884303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843703317] [2021-11-25 19:33:03,321 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:33:03,321 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:03,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:03,322 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:03,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:03,358 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:04,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21380#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< (+ 2147483647 |ULTIMATE.start_main_~y~0#1|) 0))' at error location [2021-11-25 19:33:04,103 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:04,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:33:04,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-11-25 19:33:04,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606849056] [2021-11-25 19:33:04,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:04,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-11-25 19:33:04,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-11-25 19:33:04,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294538, Invalid=300674, Unknown=0, NotChecked=0, Total=595212 [2021-11-25 19:33:04,180 INFO L87 Difference]: Start difference. First operand 1152 states and 1152 transitions. Second operand has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 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 19:33:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:38,498 INFO L93 Difference]: Finished difference Result 2305 states and 2688 transitions. [2021-11-25 19:33:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-25 19:33:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 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 1151 [2021-11-25 19:33:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:38,514 INFO L225 Difference]: With dead ends: 2305 [2021-11-25 19:33:38,515 INFO L226 Difference]: Without dead ends: 2304 [2021-11-25 19:33:38,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3835 GetRequests, 3065 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4589 ImplicationChecksByTransitivity, 209.2s TimeCoverageRelationStatistics Valid=294538, Invalid=300674, Unknown=0, NotChecked=0, Total=595212 [2021-11-25 19:33:38,549 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:38,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 769 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 19:33:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-25 19:33:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2021-11-25 19:33:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 1.0004342162396873) internal successors, (2304), 2303 states have internal predecessors, (2304), 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 19:33:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 2304 transitions. [2021-11-25 19:33:38,614 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 2304 transitions. Word has length 1151 [2021-11-25 19:33:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:38,616 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 2304 transitions. [2021-11-25 19:33:38,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 767 states have (on average 3.0) internal successors, (2301), 768 states have internal predecessors, (2301), 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 19:33:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 2304 transitions. [2021-11-25 19:33:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2304 [2021-11-25 19:33:38,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:38,656 INFO L514 BasicCegarLoop]: trace histogram [767, 767, 766, 1, 1, 1] [2021-11-25 19:33:38,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:38,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:33:38,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-25 19:33:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1173986855, now seen corresponding path program 9 times [2021-11-25 19:33:38,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:38,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004562950] [2021-11-25 19:33:38,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:38,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 881283 backedges. 0 proven. 881283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:03,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:03,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004562950] [2021-11-25 19:37:03,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004562950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:03,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541313191] [2021-11-25 19:37:03,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:37:03,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:03,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:03,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89536d78-574a-47be-8c91-6eee2df5fd0d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:37:03,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:37:03,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:37:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 3840 conjuncts, 768 conjunts are in the unsatisfiable core [2021-11-25 19:37:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 881283 backedges. 0 proven. 881283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:08,278 INFO L328 TraceCheckSpWp]: Computing backward predicates...