./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/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_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:23:30,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:23:30,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:23:30,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:23:30,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:23:30,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:23:30,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:23:30,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:23:30,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:23:30,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:23:30,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:23:30,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:23:30,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:23:30,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:23:30,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:23:30,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:23:30,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:23:30,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:23:30,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:23:30,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:23:30,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:23:30,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:23:30,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:23:30,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:23:30,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:23:30,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:23:30,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:23:30,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:23:30,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:23:30,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:23:30,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:23:30,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:23:30,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:23:30,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:23:30,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:23:30,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:23:30,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:23:30,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:23:30,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:23:30,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:23:30,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:23:30,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-25 18:23:30,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:23:30,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:23:30,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:23:30,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:23:30,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:23:30,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:23:30,257 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:23:30,258 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:23:30,258 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:23:30,258 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:23:30,259 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:23:30,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:23:30,260 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:23:30,260 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:23:30,260 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:23:30,260 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:23:30,261 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:23:30,261 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:23:30,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:23:30,262 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:23:30,262 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:23:30,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:23:30,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:23:30,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:23:30,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:23:30,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:23:30,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:23:30,265 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 18:23:30,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:23:30,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:23:30,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:23:30,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:23:30,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:23:30,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:23:30,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:23:30,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:23:30,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:23:30,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:23:30,268 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:23:30,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:23:30,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:23:30,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:23:30,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:23:30,269 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_d38e014a-0209-4423-88ed-652305a8e1c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2021-11-25 18:23:30,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:23:30,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:23:30,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:23:30,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:23:30,577 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:23:30,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2021-11-25 18:23:30,633 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/data/59ae26314/7e1ed1958f92480fa556e4cccecce3e6/FLAGcfb908f7f [2021-11-25 18:23:31,043 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:23:31,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/sv-benchmarks/c/recursive/MultCommutative-2.c [2021-11-25 18:23:31,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/data/59ae26314/7e1ed1958f92480fa556e4cccecce3e6/FLAGcfb908f7f [2021-11-25 18:23:31,439 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/data/59ae26314/7e1ed1958f92480fa556e4cccecce3e6 [2021-11-25 18:23:31,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:23:31,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:23:31,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:23:31,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:23:31,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:23:31,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31bef5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31, skipping insertion in model container [2021-11-25 18:23:31,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:23:31,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:23:31,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-11-25 18:23:31,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:23:31,718 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:23:31,751 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-11-25 18:23:31,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:23:31,773 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:23:31,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31 WrapperNode [2021-11-25 18:23:31,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:23:31,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:23:31,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:23:31,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:23:31,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,812 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-11-25 18:23:31,812 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:23:31,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:23:31,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:23:31,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:23:31,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:23:31,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:23:31,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:23:31,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:23:31,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (1/1) ... [2021-11-25 18:23:31,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:23:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:31,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:23:31,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:23:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:23:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-11-25 18:23:31,937 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-11-25 18:23:31,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:23:31,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:23:31,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:23:32,002 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:23:32,005 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:23:32,182 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:23:32,202 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:23:32,202 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:23:32,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:23:32 BoogieIcfgContainer [2021-11-25 18:23:32,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:23:32,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:23:32,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:23:32,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:23:32,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:23:31" (1/3) ... [2021-11-25 18:23:32,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1eb405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:23:32, skipping insertion in model container [2021-11-25 18:23:32,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:23:31" (2/3) ... [2021-11-25 18:23:32,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1eb405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:23:32, skipping insertion in model container [2021-11-25 18:23:32,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:23:32" (3/3) ... [2021-11-25 18:23:32,213 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2021-11-25 18:23:32,218 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:23:32,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-25 18:23:32,264 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:23:32,271 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 18:23:32,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-25 18:23:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:23:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:23:32,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:32,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:32,320 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1027513993, now seen corresponding path program 1 times [2021-11-25 18:23:32,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:32,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718781015] [2021-11-25 18:23:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:32,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:32,507 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 18:23:32,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:32,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718781015] [2021-11-25 18:23:32,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718781015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:32,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:32,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:23:32,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933806288] [2021-11-25 18:23:32,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:32,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:32,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:32,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:32,551 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:32,677 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-11-25 18:23:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:23:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:32,687 INFO L225 Difference]: With dead ends: 73 [2021-11-25 18:23:32,687 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 18:23:32,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:32,694 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:32,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 77 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 18:23:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2021-11-25 18:23:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.44) internal successors, (36), 30 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:23:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-25 18:23:32,757 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 7 [2021-11-25 18:23:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:32,757 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-25 18:23:32,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-25 18:23:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:23:32,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:32,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:32,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:23:32,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:32,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1788169763, now seen corresponding path program 1 times [2021-11-25 18:23:32,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:32,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670573002] [2021-11-25 18:23:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:32,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:32,880 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 18:23:32,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:32,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670573002] [2021-11-25 18:23:32,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670573002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:32,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:32,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:23:32,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883899139] [2021-11-25 18:23:32,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:32,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:32,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:32,885 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:32,972 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-11-25 18:23:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 18:23:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:32,975 INFO L225 Difference]: With dead ends: 58 [2021-11-25 18:23:32,975 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 18:23:32,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:32,977 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:32,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 18:23:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-11-25 18:23:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 41 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:23:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-11-25 18:23:32,991 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 8 [2021-11-25 18:23:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:32,991 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-11-25 18:23:32,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-11-25 18:23:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:23:32,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:32,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:32,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:23:32,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:32,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1125158968, now seen corresponding path program 1 times [2021-11-25 18:23:32,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:32,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173583731] [2021-11-25 18:23:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:32,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:33,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:33,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173583731] [2021-11-25 18:23:33,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173583731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:33,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:33,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:23:33,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737999141] [2021-11-25 18:23:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:33,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:33,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:33,077 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:33,151 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-25 18:23:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:23:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:33,154 INFO L225 Difference]: With dead ends: 76 [2021-11-25 18:23:33,154 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 18:23:33,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:23:33,156 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:33,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:23:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 18:23:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-11-25 18:23:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 53 states have internal predecessors, (67), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:23:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-11-25 18:23:33,173 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 13 [2021-11-25 18:23:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:33,174 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-11-25 18:23:33,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-11-25 18:23:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:23:33,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:33,175 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:33,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:23:33,176 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -691954174, now seen corresponding path program 1 times [2021-11-25 18:23:33,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:33,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975151469] [2021-11-25 18:23:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:33,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:33,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:33,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975151469] [2021-11-25 18:23:33,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975151469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:33,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:33,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:23:33,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639014952] [2021-11-25 18:23:33,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:33,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:33,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:33,241 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:23:33,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:33,344 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2021-11-25 18:23:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:33,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-25 18:23:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:33,347 INFO L225 Difference]: With dead ends: 120 [2021-11-25 18:23:33,348 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 18:23:33,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:33,350 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:33,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 86 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 18:23:33,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-11-25 18:23:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 60 states have internal predecessors, (77), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:23:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-11-25 18:23:33,370 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 14 [2021-11-25 18:23:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:33,370 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-11-25 18:23:33,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:23:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-11-25 18:23:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:23:33,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:33,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:33,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:23:33,372 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash 24264138, now seen corresponding path program 1 times [2021-11-25 18:23:33,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:33,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024799174] [2021-11-25 18:23:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:33,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:23:33,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:33,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024799174] [2021-11-25 18:23:33,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024799174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:33,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:33,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:23:33,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535126005] [2021-11-25 18:23:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:33,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:33,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:33,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:33,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:33,422 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:23:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:33,503 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2021-11-25 18:23:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:23:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-25 18:23:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:33,506 INFO L225 Difference]: With dead ends: 101 [2021-11-25 18:23:33,506 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 18:23:33,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:23:33,508 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:33,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 99 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 18:23:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-11-25 18:23:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 72 states have internal predecessors, (92), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:23:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-25 18:23:33,543 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 15 [2021-11-25 18:23:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:33,543 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-25 18:23:33,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:23:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-25 18:23:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:23:33,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:33,545 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:33,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:23:33,545 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1116235770, now seen corresponding path program 1 times [2021-11-25 18:23:33,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:33,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676485247] [2021-11-25 18:23:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:33,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:33,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:33,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676485247] [2021-11-25 18:23:33,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676485247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:23:33,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:23:33,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:23:33,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142773994] [2021-11-25 18:23:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:23:33,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:23:33,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:23:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:23:33,632 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:33,695 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2021-11-25 18:23:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:23:33,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 18:23:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:33,697 INFO L225 Difference]: With dead ends: 132 [2021-11-25 18:23:33,697 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 18:23:33,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:23:33,700 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:33,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:23:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 18:23:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-11-25 18:23:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:23:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-11-25 18:23:33,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2021-11-25 18:23:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:33,711 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-11-25 18:23:33,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:23:33,711 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-11-25 18:23:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:23:33,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:33,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:33,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:23:33,713 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash 937076250, now seen corresponding path program 1 times [2021-11-25 18:23:33,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:33,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943386120] [2021-11-25 18:23:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:33,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:33,788 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 18:23:33,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943386120] [2021-11-25 18:23:33,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943386120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355416663] [2021-11-25 18:23:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:33,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:33,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:33,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:23:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:23:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:33,945 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 18:23:33,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:34,032 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 18:23:34,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355416663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182409865] [2021-11-25 18:23:34,053 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:23:34,053 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:34,058 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:34,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:34,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-25 18:23:34,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372425183] [2021-11-25 18:23:34,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:34,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:23:34,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:23:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:23:34,062 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:23:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:34,167 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-11-25 18:23:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:23:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2021-11-25 18:23:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:34,169 INFO L225 Difference]: With dead ends: 66 [2021-11-25 18:23:34,170 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 18:23:34,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:23:34,172 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:34,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 101 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 18:23:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-11-25 18:23:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:23:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-25 18:23:34,181 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 17 [2021-11-25 18:23:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:34,181 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-25 18:23:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:23:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-25 18:23:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:23:34,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:34,183 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:34,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:34,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:34,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1015407268, now seen corresponding path program 1 times [2021-11-25 18:23:34,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89603853] [2021-11-25 18:23:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:34,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:34,471 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 18:23:34,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89603853] [2021-11-25 18:23:34,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89603853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:34,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57887835] [2021-11-25 18:23:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:34,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:34,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:23:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:23:34,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:34,614 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 18:23:34,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:34,667 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 18:23:34,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57887835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:34,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240470477] [2021-11-25 18:23:34,671 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:23:34,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:34,672 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:34,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:34,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-11-25 18:23:34,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351820063] [2021-11-25 18:23:34,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:34,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:23:34,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:23:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:23:34,689 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:23:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:34,774 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2021-11-25 18:23:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:23:34,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-25 18:23:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:34,776 INFO L225 Difference]: With dead ends: 64 [2021-11-25 18:23:34,776 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 18:23:34,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:23:34,777 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:34,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:23:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 18:23:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-11-25 18:23:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:23:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-11-25 18:23:34,786 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 18 [2021-11-25 18:23:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:34,787 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-11-25 18:23:34,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:23:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-11-25 18:23:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:23:34,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:34,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:34,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 18:23:35,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:23:35,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2063375789, now seen corresponding path program 1 times [2021-11-25 18:23:35,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:35,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408258528] [2021-11-25 18:23:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:35,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:35,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408258528] [2021-11-25 18:23:35,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408258528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808731400] [2021-11-25 18:23:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:35,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:35,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:35,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:23:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:23:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:35,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:35,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808731400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:35,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636125389] [2021-11-25 18:23:35,344 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-25 18:23:35,345 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:35,345 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:35,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:35,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2021-11-25 18:23:35,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305322738] [2021-11-25 18:23:35,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:35,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:23:35,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:35,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:23:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:23:35,348 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:23:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:35,528 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2021-11-25 18:23:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:23:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-25 18:23:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:35,530 INFO L225 Difference]: With dead ends: 93 [2021-11-25 18:23:35,530 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 18:23:35,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:23:35,534 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:35,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 82 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 18:23:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-11-25 18:23:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 18:23:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-11-25 18:23:35,562 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 24 [2021-11-25 18:23:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:35,562 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-11-25 18:23:35,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:23:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-11-25 18:23:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:23:35,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:35,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:35,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:35,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 18:23:35,784 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:35,785 INFO L85 PathProgramCache]: Analyzing trace with hash 459860035, now seen corresponding path program 1 times [2021-11-25 18:23:35,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:35,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977588957] [2021-11-25 18:23:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:35,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:23:35,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977588957] [2021-11-25 18:23:35,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977588957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707733489] [2021-11-25 18:23:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:35,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:35,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:35,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:35,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:23:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:35,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:23:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:35,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:36,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707733489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:36,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534065370] [2021-11-25 18:23:36,029 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:23:36,029 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:36,030 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:36,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:36,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2021-11-25 18:23:36,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541115490] [2021-11-25 18:23:36,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:36,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:23:36,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:23:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:23:36,033 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:23:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:36,122 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-11-25 18:23:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:23:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-25 18:23:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:36,124 INFO L225 Difference]: With dead ends: 96 [2021-11-25 18:23:36,124 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 18:23:36,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:23:36,126 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:36,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 134 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:36,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 18:23:36,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-11-25 18:23:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:23:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-25 18:23:36,133 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 25 [2021-11-25 18:23:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:36,133 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-25 18:23:36,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:23:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-25 18:23:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:23:36,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:36,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:36,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:36,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:36,349 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 385020750, now seen corresponding path program 1 times [2021-11-25 18:23:36,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:36,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626600670] [2021-11-25 18:23:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:36,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:36,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626600670] [2021-11-25 18:23:36,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626600670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021598025] [2021-11-25 18:23:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:36,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:36,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:36,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:36,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:23:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:23:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:36,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:23:36,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021598025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070760334] [2021-11-25 18:23:36,857 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:23:36,857 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:36,858 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:36,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:36,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-25 18:23:36,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874547199] [2021-11-25 18:23:36,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:36,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:23:36,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:23:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:23:36,864 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:23:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:37,186 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-11-25 18:23:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:23:37,187 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2021-11-25 18:23:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:37,188 INFO L225 Difference]: With dead ends: 86 [2021-11-25 18:23:37,188 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 18:23:37,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-11-25 18:23:37,190 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:37,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 132 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 18:23:37,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2021-11-25 18:23:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 50 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-25 18:23:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-11-25 18:23:37,205 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 28 [2021-11-25 18:23:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:37,207 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-11-25 18:23:37,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 18:23:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-11-25 18:23:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 18:23:37,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:37,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:37,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:37,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:37,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash -377928031, now seen corresponding path program 1 times [2021-11-25 18:23:37,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:37,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252141383] [2021-11-25 18:23:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:37,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:37,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:37,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252141383] [2021-11-25 18:23:37,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252141383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:37,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101209940] [2021-11-25 18:23:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:37,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:37,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:37,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:23:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:37,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:23:37,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:23:37,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:23:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101209940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:37,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1440179369] [2021-11-25 18:23:37,919 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:23:37,920 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:37,920 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:37,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:37,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2021-11-25 18:23:37,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894038168] [2021-11-25 18:23:37,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:37,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:23:37,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:23:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:23:37,923 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:23:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:38,467 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2021-11-25 18:23:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 18:23:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 35 [2021-11-25 18:23:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:38,469 INFO L225 Difference]: With dead ends: 128 [2021-11-25 18:23:38,469 INFO L226 Difference]: Without dead ends: 123 [2021-11-25 18:23:38,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:23:38,471 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 111 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:38,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 90 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:23:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-25 18:23:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 68. [2021-11-25 18:23:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (12), 10 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 18:23:38,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-11-25 18:23:38,480 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 35 [2021-11-25 18:23:38,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:38,481 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-11-25 18:23:38,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:23:38,481 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-11-25 18:23:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 18:23:38,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:38,483 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:38,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:38,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:23:38,697 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash 442028402, now seen corresponding path program 2 times [2021-11-25 18:23:38,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:38,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432603489] [2021-11-25 18:23:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:38,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 18:23:38,885 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:38,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432603489] [2021-11-25 18:23:38,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432603489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:38,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979928649] [2021-11-25 18:23:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:23:38,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:38,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:38,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:23:38,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:23:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:23:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 18:23:39,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 10 proven. 96 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 18:23:40,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979928649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213418646] [2021-11-25 18:23:40,339 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:23:40,339 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:40,339 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:40,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:40,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2021-11-25 18:23:40,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920746034] [2021-11-25 18:23:40,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:40,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:23:40,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:23:40,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:23:40,342 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 31 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 18:23:41,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:41,106 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2021-11-25 18:23:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 18:23:41,107 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 5 states have call successors, (12) Word has length 62 [2021-11-25 18:23:41,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:41,109 INFO L225 Difference]: With dead ends: 139 [2021-11-25 18:23:41,109 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 18:23:41,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=479, Invalid=2601, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 18:23:41,111 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 174 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:41,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 123 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:23:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 18:23:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 88. [2021-11-25 18:23:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 69 states have internal predecessors, (75), 6 states have call successors, (6), 4 states have call predecessors, (6), 11 states have return successors, (20), 14 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-25 18:23:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-11-25 18:23:41,120 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 62 [2021-11-25 18:23:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:41,120 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-11-25 18:23:41,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (12), 12 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 18:23:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-11-25 18:23:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:23:41,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:41,122 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:41,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:41,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:41,339 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash -325154713, now seen corresponding path program 2 times [2021-11-25 18:23:41,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534696967] [2021-11-25 18:23:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:41,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:23:41,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534696967] [2021-11-25 18:23:41,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534696967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257476563] [2021-11-25 18:23:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:23:41,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:41,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:41,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:41,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:23:41,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:23:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:23:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:23:41,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 18:23:41,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257476563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:41,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965634066] [2021-11-25 18:23:41,840 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:23:41,840 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:41,840 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:41,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:41,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-25 18:23:41,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73576449] [2021-11-25 18:23:41,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:23:41,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:23:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:23:41,842 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 18:23:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:42,130 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-11-25 18:23:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:23:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 46 [2021-11-25 18:23:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:42,132 INFO L225 Difference]: With dead ends: 109 [2021-11-25 18:23:42,132 INFO L226 Difference]: Without dead ends: 104 [2021-11-25 18:23:42,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:23:42,134 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:42,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 131 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:23:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-25 18:23:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-11-25 18:23:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 78 states have (on average 1.064102564102564) internal successors, (83), 77 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 13 states have return successors, (22), 16 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-25 18:23:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-11-25 18:23:42,145 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 46 [2021-11-25 18:23:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:42,146 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-11-25 18:23:42,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 18:23:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-11-25 18:23:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 18:23:42,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:42,150 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:42,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:42,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:23:42,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash -674862935, now seen corresponding path program 3 times [2021-11-25 18:23:42,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:42,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742951643] [2021-11-25 18:23:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:42,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 115 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 18:23:42,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:42,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742951643] [2021-11-25 18:23:42,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742951643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:42,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972037705] [2021-11-25 18:23:42,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:23:42,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:42,573 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:42,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:23:42,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:23:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 18:23:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 115 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 18:23:42,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 12 proven. 117 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:23:43,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972037705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:43,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528866487] [2021-11-25 18:23:43,875 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:23:43,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:43,875 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:23:43,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:43,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 36 [2021-11-25 18:23:43,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814349408] [2021-11-25 18:23:43,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:43,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:23:43,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:23:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:23:43,881 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 10 states have call successors, (10), 3 states have call predecessors, (10), 11 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 18:23:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:45,351 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2021-11-25 18:23:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 18:23:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 10 states have call successors, (10), 3 states have call predecessors, (10), 11 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) Word has length 68 [2021-11-25 18:23:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:45,355 INFO L225 Difference]: With dead ends: 187 [2021-11-25 18:23:45,355 INFO L226 Difference]: Without dead ends: 176 [2021-11-25 18:23:45,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2021-11-25 18:23:45,364 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 197 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:45,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 189 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:23:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-25 18:23:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 161. [2021-11-25 18:23:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 128 states have (on average 1.0546875) internal successors, (135), 127 states have internal predecessors, (135), 9 states have call successors, (9), 6 states have call predecessors, (9), 23 states have return successors, (33), 27 states have call predecessors, (33), 7 states have call successors, (33) [2021-11-25 18:23:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2021-11-25 18:23:45,380 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 68 [2021-11-25 18:23:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:45,381 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2021-11-25 18:23:45,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.7222222222222223) internal successors, (98), 35 states have internal predecessors, (98), 10 states have call successors, (10), 3 states have call predecessors, (10), 11 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 18:23:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2021-11-25 18:23:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 18:23:45,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:45,384 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-25 18:23:45,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:45,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:23:45,609 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:23:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash 147099220, now seen corresponding path program 3 times [2021-11-25 18:23:45,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:45,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283854843] [2021-11-25 18:23:45,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:45,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-25 18:23:45,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283854843] [2021-11-25 18:23:45,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283854843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960063753] [2021-11-25 18:23:45,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:23:45,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:45,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:45,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:45,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:23:45,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:23:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:23:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-25 18:23:46,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:24:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960063753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:26,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530903894] [2021-11-25 18:24:26,817 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:24:26,817 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:24:26,818 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:24:26,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:24:26,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-11-25 18:24:26,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886962588] [2021-11-25 18:24:26,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:24:26,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:24:26,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:24:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:24:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1303, Unknown=9, NotChecked=0, Total=1482 [2021-11-25 18:24:26,822 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:28,711 INFO L93 Difference]: Finished difference Result 230 states and 252 transitions. [2021-11-25 18:24:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 18:24:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) Word has length 94 [2021-11-25 18:24:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:28,723 INFO L225 Difference]: With dead ends: 230 [2021-11-25 18:24:28,723 INFO L226 Difference]: Without dead ends: 229 [2021-11-25 18:24:28,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=491, Invalid=3790, Unknown=9, NotChecked=0, Total=4290 [2021-11-25 18:24:28,726 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:28,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 395 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:24:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-25 18:24:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 166. [2021-11-25 18:24:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 132 states have (on average 1.053030303030303) internal successors, (139), 131 states have internal predecessors, (139), 9 states have call successors, (9), 6 states have call predecessors, (9), 24 states have return successors, (35), 28 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-25 18:24:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2021-11-25 18:24:28,739 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 94 [2021-11-25 18:24:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:28,739 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2021-11-25 18:24:28,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 18:24:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2021-11-25 18:24:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 18:24:28,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:28,741 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-25 18:24:28,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:28,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:24:28,957 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:24:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash 282669586, now seen corresponding path program 4 times [2021-11-25 18:24:28,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:28,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514177535] [2021-11-25 18:24:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:28,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-25 18:24:29,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:24:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514177535] [2021-11-25 18:24:29,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514177535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:24:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522338543] [2021-11-25 18:24:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:24:29,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:24:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:24:29,451 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:24:29,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:24:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:24:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 18:24:29,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:24:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-25 18:24:30,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:25:25,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522338543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553573631] [2021-11-25 18:25:25,313 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:25:25,314 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:25:25,314 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:25:25,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:25:25,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-11-25 18:25:25,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223834105] [2021-11-25 18:25:25,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:25:25,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 18:25:25,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:25:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 18:25:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1325, Unknown=17, NotChecked=0, Total=1482 [2021-11-25 18:25:25,319 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 18:25:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:32,101 INFO L93 Difference]: Finished difference Result 253 states and 279 transitions. [2021-11-25 18:25:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 18:25:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) Word has length 105 [2021-11-25 18:25:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:32,103 INFO L225 Difference]: With dead ends: 253 [2021-11-25 18:25:32,103 INFO L226 Difference]: Without dead ends: 252 [2021-11-25 18:25:32,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=454, Invalid=4357, Unknown=19, NotChecked=0, Total=4830 [2021-11-25 18:25:32,106 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 152 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:32,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 452 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 18:25:32,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-25 18:25:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 171. [2021-11-25 18:25:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.0514705882352942) internal successors, (143), 135 states have internal predecessors, (143), 9 states have call successors, (9), 6 states have call predecessors, (9), 25 states have return successors, (37), 29 states have call predecessors, (37), 7 states have call successors, (37) [2021-11-25 18:25:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2021-11-25 18:25:32,119 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 105 [2021-11-25 18:25:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:32,120 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2021-11-25 18:25:32,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 18:25:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2021-11-25 18:25:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 18:25:32,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:32,125 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:32,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:25:32,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:25:32,341 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:25:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1032513706, now seen corresponding path program 5 times [2021-11-25 18:25:32,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:32,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530925910] [2021-11-25 18:25:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:32,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-25 18:25:33,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:33,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530925910] [2021-11-25 18:25:33,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530925910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:33,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614387486] [2021-11-25 18:25:33,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:25:33,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:33,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:33,011 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:33,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:25:33,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 18:25:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:25:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 18:25:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 291 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-25 18:25:34,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:25:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614387486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079158305] [2021-11-25 18:25:37,322 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:25:37,322 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:25:37,322 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:25:37,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:25:37,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-11-25 18:25:37,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048069290] [2021-11-25 18:25:37,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:25:37,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:25:37,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:25:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:25:37,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:25:37,325 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 37 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (20), 20 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:25:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:40,158 INFO L93 Difference]: Finished difference Result 276 states and 306 transitions. [2021-11-25 18:25:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 18:25:40,159 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (20), 20 states have call predecessors, (20), 2 states have call successors, (20) Word has length 116 [2021-11-25 18:25:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:40,161 INFO L225 Difference]: With dead ends: 276 [2021-11-25 18:25:40,161 INFO L226 Difference]: Without dead ends: 275 [2021-11-25 18:25:40,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=394, Invalid=5008, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 18:25:40,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 170 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:40,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 489 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1846 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 18:25:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-25 18:25:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 176. [2021-11-25 18:25:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 140 states have (on average 1.05) internal successors, (147), 139 states have internal predecessors, (147), 9 states have call successors, (9), 6 states have call predecessors, (9), 26 states have return successors, (39), 30 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-25 18:25:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 195 transitions. [2021-11-25 18:25:40,177 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 195 transitions. Word has length 116 [2021-11-25 18:25:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:40,178 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 195 transitions. [2021-11-25 18:25:40,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (20), 20 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:25:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 195 transitions. [2021-11-25 18:25:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 18:25:40,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:40,180 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:40,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:25:40,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:25:40,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:25:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1830791249, now seen corresponding path program 4 times [2021-11-25 18:25:40,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:40,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390232613] [2021-11-25 18:25:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:40,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 121 proven. 81 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-25 18:25:40,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390232613] [2021-11-25 18:25:40,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390232613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240218392] [2021-11-25 18:25:40,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:25:40,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:40,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:40,661 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:40,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:25:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 18:25:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 3 proven. 214 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 18:25:41,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:25:47,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240218392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953642166] [2021-11-25 18:25:47,739 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:25:47,739 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:25:47,740 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:25:47,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:25:47,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 28 [2021-11-25 18:25:47,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691839480] [2021-11-25 18:25:47,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:25:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:25:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:25:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:25:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1005, Unknown=2, NotChecked=0, Total=1122 [2021-11-25 18:25:47,742 INFO L87 Difference]: Start difference. First operand 176 states and 195 transitions. Second operand has 29 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 7 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (15), 15 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-25 18:25:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:49,815 INFO L93 Difference]: Finished difference Result 250 states and 273 transitions. [2021-11-25 18:25:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-25 18:25:49,816 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 7 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (15), 15 states have call predecessors, (15), 6 states have call successors, (15) Word has length 90 [2021-11-25 18:25:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:49,818 INFO L225 Difference]: With dead ends: 250 [2021-11-25 18:25:49,818 INFO L226 Difference]: Without dead ends: 245 [2021-11-25 18:25:49,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=580, Invalid=3708, Unknown=2, NotChecked=0, Total=4290 [2021-11-25 18:25:49,820 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:49,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 252 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:25:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-25 18:25:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 181. [2021-11-25 18:25:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 143 states have internal predecessors, (151), 9 states have call successors, (9), 6 states have call predecessors, (9), 27 states have return successors, (40), 31 states have call predecessors, (40), 7 states have call successors, (40) [2021-11-25 18:25:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 200 transitions. [2021-11-25 18:25:49,837 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 200 transitions. Word has length 90 [2021-11-25 18:25:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:49,837 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 200 transitions. [2021-11-25 18:25:49,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 7 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (15), 15 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-25 18:25:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 200 transitions. [2021-11-25 18:25:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:25:49,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:49,840 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:49,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:25:50,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:50,053 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:25:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1565122770, now seen corresponding path program 6 times [2021-11-25 18:25:50,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:50,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146798452] [2021-11-25 18:25:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:50,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-25 18:25:50,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146798452] [2021-11-25 18:25:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146798452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505859651] [2021-11-25 18:25:50,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:25:50,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:50,739 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:50,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:25:50,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:25:50,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:25:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 18:25:50,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-25 18:25:52,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:25:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505859651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844272489] [2021-11-25 18:25:55,875 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:25:55,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:25:55,875 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:25:55,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:25:55,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-11-25 18:25:55,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479912891] [2021-11-25 18:25:55,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:25:55,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 18:25:55,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:25:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 18:25:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:25:55,880 INFO L87 Difference]: Start difference. First operand 181 states and 200 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 3 states have call successors, (4), 2 states have call predecessors, (4), 12 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 18:25:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:59,330 INFO L93 Difference]: Finished difference Result 296 states and 329 transitions. [2021-11-25 18:25:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 18:25:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 3 states have call successors, (4), 2 states have call predecessors, (4), 12 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) Word has length 139 [2021-11-25 18:25:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:59,333 INFO L225 Difference]: With dead ends: 296 [2021-11-25 18:25:59,333 INFO L226 Difference]: Without dead ends: 295 [2021-11-25 18:25:59,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 133 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=426, Invalid=5894, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 18:25:59,336 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 180 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2414 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:59,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 632 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2414 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 18:25:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-25 18:25:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 186. [2021-11-25 18:25:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 148 states have (on average 1.0472972972972974) internal successors, (155), 147 states have internal predecessors, (155), 9 states have call successors, (9), 6 states have call predecessors, (9), 28 states have return successors, (42), 32 states have call predecessors, (42), 7 states have call successors, (42) [2021-11-25 18:25:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 206 transitions. [2021-11-25 18:25:59,351 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 206 transitions. Word has length 139 [2021-11-25 18:25:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:59,352 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 206 transitions. [2021-11-25 18:25:59,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 3 states have call successors, (4), 2 states have call predecessors, (4), 12 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 18:25:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 206 transitions. [2021-11-25 18:25:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 18:25:59,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:59,354 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 9, 9, 9, 9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:59,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-25 18:25:59,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:59,569 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:25:59,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1520171309, now seen corresponding path program 5 times [2021-11-25 18:25:59,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:59,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803370201] [2021-11-25 18:25:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:59,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 2 proven. 309 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-25 18:26:00,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:00,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803370201] [2021-11-25 18:26:00,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803370201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500211756] [2021-11-25 18:26:00,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:26:00,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:00,218 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:00,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:26:00,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-25 18:26:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:26:00,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:26:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 113 proven. 192 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-25 18:26:01,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:24,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500211756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:24,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222322047] [2021-11-25 18:26:24,392 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:26:24,392 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:24,392 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:26:24,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:26:24,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 36 [2021-11-25 18:26:24,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232138026] [2021-11-25 18:26:24,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:24,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:26:24,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:24,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:26:24,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1785, Unknown=7, NotChecked=0, Total=1980 [2021-11-25 18:26:24,395 INFO L87 Difference]: Start difference. First operand 186 states and 206 transitions. Second operand has 37 states, 36 states have (on average 2.75) internal successors, (99), 35 states have internal predecessors, (99), 7 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (20), 20 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-25 18:26:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:29,291 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2021-11-25 18:26:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-25 18:26:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.75) internal successors, (99), 35 states have internal predecessors, (99), 7 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (20), 20 states have call predecessors, (20), 6 states have call successors, (20) Word has length 112 [2021-11-25 18:26:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:29,293 INFO L225 Difference]: With dead ends: 251 [2021-11-25 18:26:29,294 INFO L226 Difference]: Without dead ends: 242 [2021-11-25 18:26:29,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=967, Invalid=7956, Unknown=7, NotChecked=0, Total=8930 [2021-11-25 18:26:29,299 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 226 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 2474 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:29,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 519 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2474 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 18:26:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-25 18:26:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 143. [2021-11-25 18:26:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 114 states have (on average 1.043859649122807) internal successors, (119), 113 states have internal predecessors, (119), 6 states have call successors, (6), 4 states have call predecessors, (6), 22 states have return successors, (35), 25 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-25 18:26:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2021-11-25 18:26:29,313 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 112 [2021-11-25 18:26:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:29,313 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2021-11-25 18:26:29,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.75) internal successors, (99), 35 states have internal predecessors, (99), 7 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (20), 20 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-25 18:26:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2021-11-25 18:26:29,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 18:26:29,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:29,316 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:29,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:29,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:29,529 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:26:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1604616104, now seen corresponding path program 7 times [2021-11-25 18:26:29,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:29,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20706328] [2021-11-25 18:26:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:29,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-25 18:26:30,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20706328] [2021-11-25 18:26:30,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20706328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:30,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559247329] [2021-11-25 18:26:30,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:26:30,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:30,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:30,633 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:30,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:26:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 18:26:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-25 18:26:32,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:40,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559247329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2090563621] [2021-11-25 18:26:40,983 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:26:40,983 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:40,983 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:26:40,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:26:40,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-11-25 18:26:40,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234199539] [2021-11-25 18:26:40,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:26:40,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:26:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:26:40,988 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 42 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 18:26:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:44,568 INFO L93 Difference]: Finished difference Result 234 states and 256 transitions. [2021-11-25 18:26:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-25 18:26:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 42 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) Word has length 138 [2021-11-25 18:26:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:44,571 INFO L225 Difference]: With dead ends: 234 [2021-11-25 18:26:44,571 INFO L226 Difference]: Without dead ends: 233 [2021-11-25 18:26:44,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 130 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=565, Invalid=6917, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 18:26:44,573 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 187 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:44,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 686 Invalid, 2751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:26:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-25 18:26:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 148. [2021-11-25 18:26:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 117 states have internal predecessors, (123), 6 states have call successors, (6), 4 states have call predecessors, (6), 23 states have return successors, (37), 26 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-25 18:26:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2021-11-25 18:26:44,583 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 138 [2021-11-25 18:26:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2021-11-25 18:26:44,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 42 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 18:26:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2021-11-25 18:26:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 18:26:44,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:44,586 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 11, 10, 10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:44,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:44,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-25 18:26:44,809 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:26:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1410084937, now seen corresponding path program 6 times [2021-11-25 18:26:44,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:44,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197040925] [2021-11-25 18:26:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:44,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 6 proven. 486 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-25 18:26:45,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197040925] [2021-11-25 18:26:45,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197040925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580640627] [2021-11-25 18:26:45,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:26:45,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:45,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:45,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:26:45,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:26:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:26:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 18:26:45,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 6 proven. 486 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-25 18:26:47,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:49,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580640627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764066324] [2021-11-25 18:26:49,020 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:26:49,020 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:49,020 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:26:49,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:26:49,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 36 [2021-11-25 18:26:49,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841289520] [2021-11-25 18:26:49,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:49,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:26:49,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:26:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:26:49,023 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 5 states have call successors, (6), 2 states have call predecessors, (6), 12 states have return successors, (20), 20 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 18:26:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:52,911 INFO L93 Difference]: Finished difference Result 261 states and 283 transitions. [2021-11-25 18:26:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 18:26:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 5 states have call successors, (6), 2 states have call predecessors, (6), 12 states have return successors, (20), 20 states have call predecessors, (20), 4 states have call successors, (20) Word has length 135 [2021-11-25 18:26:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:52,913 INFO L225 Difference]: With dead ends: 261 [2021-11-25 18:26:52,914 INFO L226 Difference]: Without dead ends: 258 [2021-11-25 18:26:52,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 133 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=455, Invalid=5245, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 18:26:52,915 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 142 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:52,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 551 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 18:26:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-25 18:26:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 216. [2021-11-25 18:26:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 171 states have internal predecessors, (179), 9 states have call successors, (9), 6 states have call predecessors, (9), 34 states have return successors, (49), 38 states have call predecessors, (49), 7 states have call successors, (49) [2021-11-25 18:26:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2021-11-25 18:26:52,928 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 135 [2021-11-25 18:26:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:52,928 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2021-11-25 18:26:52,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 5 states have call successors, (6), 2 states have call predecessors, (6), 12 states have return successors, (20), 20 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 18:26:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2021-11-25 18:26:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-25 18:26:52,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:52,931 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:52,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:53,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 18:26:53,145 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:26:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1727115348, now seen corresponding path program 8 times [2021-11-25 18:26:53,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:53,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228676684] [2021-11-25 18:26:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:53,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 627 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-25 18:26:54,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228676684] [2021-11-25 18:26:54,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228676684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:54,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177211214] [2021-11-25 18:26:54,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:26:54,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:54,119 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:54,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:26:54,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-25 18:26:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:26:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:26:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 627 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-25 18:26:56,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:27:01,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177211214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759987202] [2021-11-25 18:27:01,868 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:27:01,868 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:27:01,868 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:27:01,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:27:01,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-11-25 18:27:01,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182193433] [2021-11-25 18:27:01,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:27:01,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 18:27:01,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 18:27:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:27:01,870 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 3 states have call successors, (4), 2 states have call predecessors, (4), 14 states have return successors, (26), 26 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 18:27:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:05,897 INFO L93 Difference]: Finished difference Result 333 states and 367 transitions. [2021-11-25 18:27:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-25 18:27:05,898 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 3 states have call successors, (4), 2 states have call predecessors, (4), 14 states have return successors, (26), 26 states have call predecessors, (26), 2 states have call successors, (26) Word has length 161 [2021-11-25 18:27:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:05,900 INFO L225 Difference]: With dead ends: 333 [2021-11-25 18:27:05,900 INFO L226 Difference]: Without dead ends: 332 [2021-11-25 18:27:05,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 153 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=474, Invalid=7716, Unknown=0, NotChecked=0, Total=8190 [2021-11-25 18:27:05,902 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 203 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:05,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 765 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3095 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 18:27:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-25 18:27:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 221. [2021-11-25 18:27:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 175 states have internal predecessors, (183), 9 states have call successors, (9), 6 states have call predecessors, (9), 35 states have return successors, (51), 39 states have call predecessors, (51), 7 states have call successors, (51) [2021-11-25 18:27:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2021-11-25 18:27:05,916 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 161 [2021-11-25 18:27:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:05,916 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2021-11-25 18:27:05,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 3 states have call successors, (4), 2 states have call predecessors, (4), 14 states have return successors, (26), 26 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-25 18:27:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2021-11-25 18:27:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-25 18:27:05,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:05,919 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 11, 11, 11, 11, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:05,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:06,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 18:27:06,145 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:27:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1988880751, now seen corresponding path program 7 times [2021-11-25 18:27:06,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:06,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546656919] [2021-11-25 18:27:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:06,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 2 proven. 436 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:27:06,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:06,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546656919] [2021-11-25 18:27:06,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546656919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:06,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317811784] [2021-11-25 18:27:06,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:27:06,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:06,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:06,934 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:06,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:27:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 18:27:07,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 2 proven. 436 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:27:08,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:27:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317811784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1734517718] [2021-11-25 18:27:11,487 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:27:11,487 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:27:11,488 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:27:11,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:27:11,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 39 [2021-11-25 18:27:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39526558] [2021-11-25 18:27:11,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:27:11,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 18:27:11,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 18:27:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1614, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:27:11,492 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand has 40 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-25 18:27:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:15,869 INFO L93 Difference]: Finished difference Result 284 states and 308 transitions. [2021-11-25 18:27:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 18:27:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) Word has length 134 [2021-11-25 18:27:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:15,872 INFO L225 Difference]: With dead ends: 284 [2021-11-25 18:27:15,873 INFO L226 Difference]: Without dead ends: 281 [2021-11-25 18:27:15,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 127 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=501, Invalid=6305, Unknown=0, NotChecked=0, Total=6806 [2021-11-25 18:27:15,875 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:15,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 685 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3048 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:27:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-25 18:27:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 226. [2021-11-25 18:27:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 180 states have (on average 1.038888888888889) internal successors, (187), 179 states have internal predecessors, (187), 9 states have call successors, (9), 6 states have call predecessors, (9), 36 states have return successors, (52), 40 states have call predecessors, (52), 7 states have call successors, (52) [2021-11-25 18:27:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2021-11-25 18:27:15,888 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 134 [2021-11-25 18:27:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:15,889 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2021-11-25 18:27:15,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 39 states have internal predecessors, (98), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-25 18:27:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2021-11-25 18:27:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-25 18:27:15,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:15,892 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:15,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:16,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:16,117 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:27:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash 303260412, now seen corresponding path program 9 times [2021-11-25 18:27:16,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:16,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528429188] [2021-11-25 18:27:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:16,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 711 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-25 18:27:17,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528429188] [2021-11-25 18:27:17,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528429188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569908430] [2021-11-25 18:27:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:27:17,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:17,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:17,481 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:17,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:27:17,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:27:17,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:27:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-25 18:27:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 711 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-11-25 18:27:20,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:22,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569908430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:22,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550508911] [2021-11-25 18:28:22,084 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:28:22,084 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:22,084 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:28:22,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:28:22,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-11-25 18:28:22,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140723092] [2021-11-25 18:28:22,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:22,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 18:28:22,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 18:28:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2640, Unknown=22, NotChecked=0, Total=2862 [2021-11-25 18:28:22,088 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand has 49 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 3 states have call successors, (4), 2 states have call predecessors, (4), 15 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:28:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:29,266 INFO L93 Difference]: Finished difference Result 356 states and 392 transitions. [2021-11-25 18:28:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-25 18:28:29,267 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 3 states have call successors, (4), 2 states have call predecessors, (4), 15 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) Word has length 172 [2021-11-25 18:28:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:29,269 INFO L225 Difference]: With dead ends: 356 [2021-11-25 18:28:29,269 INFO L226 Difference]: Without dead ends: 355 [2021-11-25 18:28:29,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 166 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=682, Invalid=9395, Unknown=23, NotChecked=0, Total=10100 [2021-11-25 18:28:29,271 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 221 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 3512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:29,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 807 Invalid, 3512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3386 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:28:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-25 18:28:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 231. [2021-11-25 18:28:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 184 states have (on average 1.0380434782608696) internal successors, (191), 183 states have internal predecessors, (191), 9 states have call successors, (9), 6 states have call predecessors, (9), 37 states have return successors, (54), 41 states have call predecessors, (54), 7 states have call successors, (54) [2021-11-25 18:28:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 254 transitions. [2021-11-25 18:28:29,285 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 254 transitions. Word has length 172 [2021-11-25 18:28:29,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:29,286 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 254 transitions. [2021-11-25 18:28:29,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 3 states have call successors, (4), 2 states have call predecessors, (4), 15 states have return successors, (28), 28 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:28:29,286 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 254 transitions. [2021-11-25 18:28:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:28:29,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:29,289 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 14, 13, 12, 12, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:29,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:29,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 18:28:29,505 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:28:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1724251915, now seen corresponding path program 8 times [2021-11-25 18:28:29,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951301959] [2021-11-25 18:28:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:29,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 6 proven. 647 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-25 18:28:30,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951301959] [2021-11-25 18:28:30,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951301959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655926454] [2021-11-25 18:28:30,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:28:30,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:30,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:30,377 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:30,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 18:28:30,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-25 18:28:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:28:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:28:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 6 proven. 647 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-25 18:28:32,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:36,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655926454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118469530] [2021-11-25 18:28:36,269 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:28:36,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:36,270 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:28:36,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:28:36,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 42 [2021-11-25 18:28:36,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769986923] [2021-11-25 18:28:36,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:36,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:28:36,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:28:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1864, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:28:36,275 INFO L87 Difference]: Start difference. First operand 231 states and 254 transitions. Second operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 5 states have call successors, (6), 2 states have call predecessors, (6), 14 states have return successors, (24), 24 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-25 18:28:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:41,300 INFO L93 Difference]: Finished difference Result 307 states and 333 transitions. [2021-11-25 18:28:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-25 18:28:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 5 states have call successors, (6), 2 states have call predecessors, (6), 14 states have return successors, (24), 24 states have call predecessors, (24), 4 states have call successors, (24) Word has length 157 [2021-11-25 18:28:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:41,305 INFO L225 Difference]: With dead ends: 307 [2021-11-25 18:28:41,306 INFO L226 Difference]: Without dead ends: 304 [2021-11-25 18:28:41,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 153 SyntacticMatches, 9 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=558, Invalid=7632, Unknown=0, NotChecked=0, Total=8190 [2021-11-25 18:28:41,308 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 172 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:41,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 769 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3503 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:28:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-25 18:28:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 236. [2021-11-25 18:28:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 188 states have (on average 1.0372340425531914) internal successors, (195), 187 states have internal predecessors, (195), 9 states have call successors, (9), 6 states have call predecessors, (9), 38 states have return successors, (55), 42 states have call predecessors, (55), 7 states have call successors, (55) [2021-11-25 18:28:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 259 transitions. [2021-11-25 18:28:41,322 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 259 transitions. Word has length 157 [2021-11-25 18:28:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:41,323 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 259 transitions. [2021-11-25 18:28:41,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 5 states have call successors, (6), 2 states have call predecessors, (6), 14 states have return successors, (24), 24 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-25 18:28:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 259 transitions. [2021-11-25 18:28:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 18:28:41,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:41,326 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 13, 12, 11, 11, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:41,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:41,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 18:28:41,552 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:28:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2026245611, now seen corresponding path program 9 times [2021-11-25 18:28:41,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374253521] [2021-11-25 18:28:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 247 proven. 341 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-25 18:28:42,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:42,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374253521] [2021-11-25 18:28:42,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374253521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:42,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483203414] [2021-11-25 18:28:42,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:28:42,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:42,321 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 18:28:42,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:28:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:28:42,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:28:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 9 proven. 594 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-25 18:28:44,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:47,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483203414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:47,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719622289] [2021-11-25 18:28:47,194 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:28:47,194 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:47,194 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:28:47,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:28:47,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 40 [2021-11-25 18:28:47,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919264075] [2021-11-25 18:28:47,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:47,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 18:28:47,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 18:28:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 18:28:47,198 INFO L87 Difference]: Start difference. First operand 236 states and 259 transitions. Second operand has 41 states, 40 states have (on average 2.75) internal successors, (110), 39 states have internal predecessors, (110), 7 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (23), 23 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-25 18:28:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:52,911 INFO L93 Difference]: Finished difference Result 350 states and 377 transitions. [2021-11-25 18:28:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-25 18:28:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.75) internal successors, (110), 39 states have internal predecessors, (110), 7 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (23), 23 states have call predecessors, (23), 6 states have call successors, (23) Word has length 146 [2021-11-25 18:28:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:52,914 INFO L225 Difference]: With dead ends: 350 [2021-11-25 18:28:52,914 INFO L226 Difference]: Without dead ends: 345 [2021-11-25 18:28:52,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=811, Invalid=8891, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 18:28:52,916 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 291 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:52,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 622 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2951 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 18:28:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-25 18:28:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 241. [2021-11-25 18:28:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 192 states have (on average 1.0364583333333333) internal successors, (199), 191 states have internal predecessors, (199), 9 states have call successors, (9), 6 states have call predecessors, (9), 39 states have return successors, (56), 43 states have call predecessors, (56), 7 states have call successors, (56) [2021-11-25 18:28:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 264 transitions. [2021-11-25 18:28:52,929 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 264 transitions. Word has length 146 [2021-11-25 18:28:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:52,930 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 264 transitions. [2021-11-25 18:28:52,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.75) internal successors, (110), 39 states have internal predecessors, (110), 7 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (23), 23 states have call predecessors, (23), 6 states have call successors, (23) [2021-11-25 18:28:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 264 transitions. [2021-11-25 18:28:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-25 18:28:52,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:52,933 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:52,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-25 18:28:53,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-25 18:28:53,153 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:28:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:53,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1258470644, now seen corresponding path program 10 times [2021-11-25 18:28:53,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:53,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167662767] [2021-11-25 18:28:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:53,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 626 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-11-25 18:28:54,650 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167662767] [2021-11-25 18:28:54,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167662767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:54,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6300395] [2021-11-25 18:28:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:28:54,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:54,651 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:54,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 18:28:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-25 18:28:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 626 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-11-25 18:28:57,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:29:06,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6300395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:06,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1706589215] [2021-11-25 18:29:06,085 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:29:06,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:29:06,085 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:29:06,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:29:06,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-11-25 18:29:06,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068915423] [2021-11-25 18:29:06,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:29:06,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-25 18:29:06,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-25 18:29:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 18:29:06,088 INFO L87 Difference]: Start difference. First operand 241 states and 264 transitions. Second operand has 52 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (30), 30 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 18:29:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:12,812 INFO L93 Difference]: Finished difference Result 376 states and 413 transitions. [2021-11-25 18:29:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 18:29:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (30), 30 states have call predecessors, (30), 2 states have call successors, (30) Word has length 171 [2021-11-25 18:29:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:12,815 INFO L225 Difference]: With dead ends: 376 [2021-11-25 18:29:12,815 INFO L226 Difference]: Without dead ends: 375 [2021-11-25 18:29:12,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 157 SyntacticMatches, 13 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=554, Invalid=10158, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 18:29:12,817 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 232 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 4174 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 4314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:12,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 970 Invalid, 4314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4174 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 18:29:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-25 18:29:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 246. [2021-11-25 18:29:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 196 states have (on average 1.0357142857142858) internal successors, (203), 195 states have internal predecessors, (203), 9 states have call successors, (9), 6 states have call predecessors, (9), 40 states have return successors, (58), 44 states have call predecessors, (58), 7 states have call successors, (58) [2021-11-25 18:29:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 270 transitions. [2021-11-25 18:29:12,831 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 270 transitions. Word has length 171 [2021-11-25 18:29:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:12,832 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 270 transitions. [2021-11-25 18:29:12,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (30), 30 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 18:29:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 270 transitions. [2021-11-25 18:29:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:29:12,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:12,834 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 13, 13, 13, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:12,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-25 18:29:13,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 18:29:13,048 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:29:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1853934001, now seen corresponding path program 10 times [2021-11-25 18:29:13,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:13,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917669916] [2021-11-25 18:29:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:13,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 2 proven. 583 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-25 18:29:14,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917669916] [2021-11-25 18:29:14,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917669916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:14,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880603070] [2021-11-25 18:29:14,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:29:14,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:14,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:14,186 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:14,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 18:29:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:14,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 18:29:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 2 proven. 583 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-25 18:29:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:29:21,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880603070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:21,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098473247] [2021-11-25 18:29:21,153 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:29:21,153 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:29:21,153 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:29:21,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:29:21,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 45 [2021-11-25 18:29:21,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780628013] [2021-11-25 18:29:21,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:29:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 18:29:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:21,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 18:29:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2132, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 18:29:21,160 INFO L87 Difference]: Start difference. First operand 246 states and 270 transitions. Second operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (26), 26 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-25 18:29:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:27,338 INFO L93 Difference]: Finished difference Result 327 states and 354 transitions. [2021-11-25 18:29:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-25 18:29:27,339 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (26), 26 states have call predecessors, (26), 4 states have call successors, (26) Word has length 156 [2021-11-25 18:29:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:27,341 INFO L225 Difference]: With dead ends: 327 [2021-11-25 18:29:27,341 INFO L226 Difference]: Without dead ends: 324 [2021-11-25 18:29:27,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=604, Invalid=8902, Unknown=0, NotChecked=0, Total=9506 [2021-11-25 18:29:27,343 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 186 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 4270 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 4409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:27,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 941 Invalid, 4409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4270 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 18:29:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-25 18:29:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 251. [2021-11-25 18:29:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 200 states have (on average 1.035) internal successors, (207), 199 states have internal predecessors, (207), 9 states have call successors, (9), 6 states have call predecessors, (9), 41 states have return successors, (59), 45 states have call predecessors, (59), 7 states have call successors, (59) [2021-11-25 18:29:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 275 transitions. [2021-11-25 18:29:27,357 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 275 transitions. Word has length 156 [2021-11-25 18:29:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:27,357 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 275 transitions. [2021-11-25 18:29:27,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (26), 26 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-25 18:29:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 275 transitions. [2021-11-25 18:29:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:29:27,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:27,360 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 14, 13, 12, 12, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:27,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:27,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:27,585 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:29:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:27,585 INFO L85 PathProgramCache]: Analyzing trace with hash -317290019, now seen corresponding path program 11 times [2021-11-25 18:29:27,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:27,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445660702] [2021-11-25 18:29:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:27,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 271 proven. 405 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-25 18:29:28,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:28,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445660702] [2021-11-25 18:29:28,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445660702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:28,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539156828] [2021-11-25 18:29:28,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:29:28,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:28,254 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:28,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 18:29:28,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-25 18:29:28,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:29:28,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 18:29:28,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 271 proven. 405 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-25 18:29:30,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:29:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539156828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904057531] [2021-11-25 18:29:32,923 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:29:32,923 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:29:32,923 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:29:32,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:29:32,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-11-25 18:29:32,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881322752] [2021-11-25 18:29:32,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:29:32,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 18:29:32,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:32,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 18:29:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:29:32,928 INFO L87 Difference]: Start difference. First operand 251 states and 275 transitions. Second operand has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 states have internal predecessors, (95), 4 states have call successors, (6), 2 states have call predecessors, (6), 12 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-25 18:29:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:35,962 INFO L93 Difference]: Finished difference Result 301 states and 325 transitions. [2021-11-25 18:29:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 18:29:35,963 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 states have internal predecessors, (95), 4 states have call successors, (6), 2 states have call predecessors, (6), 12 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) Word has length 157 [2021-11-25 18:29:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:35,965 INFO L225 Difference]: With dead ends: 301 [2021-11-25 18:29:35,965 INFO L226 Difference]: Without dead ends: 298 [2021-11-25 18:29:35,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 152 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=348, Invalid=4482, Unknown=0, NotChecked=0, Total=4830 [2021-11-25 18:29:35,967 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 122 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:35,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 833 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 18:29:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-25 18:29:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-11-25 18:29:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 204 states have (on average 1.0343137254901962) internal successors, (211), 203 states have internal predecessors, (211), 9 states have call successors, (9), 6 states have call predecessors, (9), 42 states have return successors, (60), 46 states have call predecessors, (60), 7 states have call successors, (60) [2021-11-25 18:29:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 280 transitions. [2021-11-25 18:29:35,980 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 280 transitions. Word has length 157 [2021-11-25 18:29:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:35,980 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 280 transitions. [2021-11-25 18:29:35,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.638888888888889) internal successors, (95), 36 states have internal predecessors, (95), 4 states have call successors, (6), 2 states have call predecessors, (6), 12 states have return successors, (22), 22 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-25 18:29:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 280 transitions. [2021-11-25 18:29:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-25 18:29:35,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:35,983 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:36,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-25 18:29:36,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:36,209 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:29:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash 106899070, now seen corresponding path program 11 times [2021-11-25 18:29:36,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905999314] [2021-11-25 18:29:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:36,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 0 proven. 894 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-25 18:29:37,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905999314] [2021-11-25 18:29:37,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905999314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944319572] [2021-11-25 18:29:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:29:37,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:37,898 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:37,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 18:29:38,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-25 18:29:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:29:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:29:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 0 proven. 894 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-25 18:29:41,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:29:50,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944319572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:50,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2097173034] [2021-11-25 18:29:50,576 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:29:50,576 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:29:50,576 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:29:50,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:29:50,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-11-25 18:29:50,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820519620] [2021-11-25 18:29:50,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:29:50,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-25 18:29:50,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-25 18:29:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 18:29:50,578 INFO L87 Difference]: Start difference. First operand 256 states and 280 transitions. Second operand has 55 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 3 states have call successors, (4), 2 states have call predecessors, (4), 17 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 18:29:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:57,281 INFO L93 Difference]: Finished difference Result 396 states and 434 transitions. [2021-11-25 18:29:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-25 18:29:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 3 states have call successors, (4), 2 states have call predecessors, (4), 17 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) Word has length 194 [2021-11-25 18:29:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:57,284 INFO L225 Difference]: With dead ends: 396 [2021-11-25 18:29:57,285 INFO L226 Difference]: Without dead ends: 395 [2021-11-25 18:29:57,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=586, Invalid=11404, Unknown=0, NotChecked=0, Total=11990 [2021-11-25 18:29:57,287 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 245 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 4415 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 4561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 4415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:57,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 1008 Invalid, 4561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 4415 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 18:29:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-25 18:29:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 261. [2021-11-25 18:29:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 207 states have internal predecessors, (215), 9 states have call successors, (9), 6 states have call predecessors, (9), 43 states have return successors, (62), 47 states have call predecessors, (62), 7 states have call successors, (62) [2021-11-25 18:29:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 286 transitions. [2021-11-25 18:29:57,301 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 286 transitions. Word has length 194 [2021-11-25 18:29:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:57,301 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 286 transitions. [2021-11-25 18:29:57,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.3703703703703702) internal successors, (128), 54 states have internal predecessors, (128), 3 states have call successors, (4), 2 states have call predecessors, (4), 17 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-25 18:29:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 286 transitions. [2021-11-25 18:29:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-25 18:29:57,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:57,304 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 14, 14, 14, 14, 14, 14, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:57,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:57,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:57,533 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:29:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1345760533, now seen corresponding path program 12 times [2021-11-25 18:29:57,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353768384] [2021-11-25 18:29:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:57,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 2 proven. 664 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-25 18:29:58,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353768384] [2021-11-25 18:29:58,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353768384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492610876] [2021-11-25 18:29:58,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:29:58,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:58,556 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:58,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 18:29:59,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:29:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:29:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:29:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 2 proven. 664 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-25 18:30:01,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:06,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492610876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873946845] [2021-11-25 18:30:06,766 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:30:06,766 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:06,767 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:30:06,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:30:06,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 48 [2021-11-25 18:30:06,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477805521] [2021-11-25 18:30:06,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:30:06,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 18:30:06,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:06,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 18:30:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2418, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:30:06,771 INFO L87 Difference]: Start difference. First operand 261 states and 286 transitions. Second operand has 49 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 5 states have call successors, (5), 2 states have call predecessors, (5), 16 states have return successors, (28), 28 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-25 18:30:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:13,389 INFO L93 Difference]: Finished difference Result 347 states and 375 transitions. [2021-11-25 18:30:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-25 18:30:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 5 states have call successors, (5), 2 states have call predecessors, (5), 16 states have return successors, (28), 28 states have call predecessors, (28), 4 states have call successors, (28) Word has length 167 [2021-11-25 18:30:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:13,391 INFO L225 Difference]: With dead ends: 347 [2021-11-25 18:30:13,391 INFO L226 Difference]: Without dead ends: 344 [2021-11-25 18:30:13,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=650, Invalid=10270, Unknown=0, NotChecked=0, Total=10920 [2021-11-25 18:30:13,393 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 4586 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 4586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:13,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1006 Invalid, 4735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 4586 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 18:30:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-25 18:30:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 266. [2021-11-25 18:30:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 212 states have (on average 1.0330188679245282) internal successors, (219), 211 states have internal predecessors, (219), 9 states have call successors, (9), 6 states have call predecessors, (9), 44 states have return successors, (63), 48 states have call predecessors, (63), 7 states have call successors, (63) [2021-11-25 18:30:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 291 transitions. [2021-11-25 18:30:13,406 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 291 transitions. Word has length 167 [2021-11-25 18:30:13,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:13,406 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 291 transitions. [2021-11-25 18:30:13,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.4791666666666665) internal successors, (119), 48 states have internal predecessors, (119), 5 states have call successors, (5), 2 states have call predecessors, (5), 16 states have return successors, (28), 28 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-25 18:30:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 291 transitions. [2021-11-25 18:30:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:30:13,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:13,409 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 13, 13, 13, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:13,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:13,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-25 18:30:13,633 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:30:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash -51937653, now seen corresponding path program 13 times [2021-11-25 18:30:13,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:13,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602845638] [2021-11-25 18:30:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:13,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 265 proven. 348 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2021-11-25 18:30:14,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602845638] [2021-11-25 18:30:14,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602845638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673616732] [2021-11-25 18:30:14,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:30:14,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:14,354 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:14,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 18:30:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-25 18:30:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 3 proven. 625 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-25 18:30:17,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:21,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673616732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796963424] [2021-11-25 18:30:21,019 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:30:21,019 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:21,019 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:30:21,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:30:21,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 46 [2021-11-25 18:30:21,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846122365] [2021-11-25 18:30:21,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:30:21,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-25 18:30:21,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-25 18:30:21,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2221, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 18:30:21,023 INFO L87 Difference]: Start difference. First operand 266 states and 291 transitions. Second operand has 47 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 45 states have internal predecessors, (124), 7 states have call successors, (9), 3 states have call predecessors, (9), 16 states have return successors, (27), 27 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-25 18:30:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:28,233 INFO L93 Difference]: Finished difference Result 400 states and 429 transitions. [2021-11-25 18:30:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-25 18:30:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 45 states have internal predecessors, (124), 7 states have call successors, (9), 3 states have call predecessors, (9), 16 states have return successors, (27), 27 states have call predecessors, (27), 6 states have call successors, (27) Word has length 156 [2021-11-25 18:30:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:28,237 INFO L225 Difference]: With dead ends: 400 [2021-11-25 18:30:28,237 INFO L226 Difference]: Without dead ends: 395 [2021-11-25 18:30:28,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 141 SyntacticMatches, 9 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3196 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=973, Invalid=12599, Unknown=0, NotChecked=0, Total=13572 [2021-11-25 18:30:28,239 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 262 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 4333 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 4541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 4333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:28,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 907 Invalid, 4541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 4333 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 18:30:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-25 18:30:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 271. [2021-11-25 18:30:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 216 states have (on average 1.0324074074074074) internal successors, (223), 215 states have internal predecessors, (223), 9 states have call successors, (9), 6 states have call predecessors, (9), 45 states have return successors, (64), 49 states have call predecessors, (64), 7 states have call successors, (64) [2021-11-25 18:30:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 296 transitions. [2021-11-25 18:30:28,252 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 296 transitions. Word has length 156 [2021-11-25 18:30:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:28,253 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 296 transitions. [2021-11-25 18:30:28,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.6956521739130435) internal successors, (124), 45 states have internal predecessors, (124), 7 states have call successors, (9), 3 states have call predecessors, (9), 16 states have return successors, (27), 27 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-25 18:30:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 296 transitions. [2021-11-25 18:30:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-25 18:30:28,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:28,256 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:28,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:28,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-25 18:30:28,468 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:30:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -236798454, now seen corresponding path program 12 times [2021-11-25 18:30:28,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963200647] [2021-11-25 18:30:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:28,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 795 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-25 18:30:29,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963200647] [2021-11-25 18:30:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963200647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763377155] [2021-11-25 18:30:29,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:30:29,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:29,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:29,852 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:29,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 18:30:30,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:30:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:30:30,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:30:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 795 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-11-25 18:30:33,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:48,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763377155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329820502] [2021-11-25 18:30:48,808 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:30:48,809 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:48,809 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:30:48,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:30:48,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2021-11-25 18:30:48,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283367968] [2021-11-25 18:30:48,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:30:48,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-25 18:30:48,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-25 18:30:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3381, Unknown=2, NotChecked=0, Total=3540 [2021-11-25 18:30:48,812 INFO L87 Difference]: Start difference. First operand 271 states and 296 transitions. Second operand has 58 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (34), 34 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 18:30:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:56,691 INFO L93 Difference]: Finished difference Result 416 states and 455 transitions. [2021-11-25 18:30:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-25 18:30:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (34), 34 states have call predecessors, (34), 2 states have call successors, (34) Word has length 193 [2021-11-25 18:30:56,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:56,694 INFO L225 Difference]: With dead ends: 416 [2021-11-25 18:30:56,694 INFO L226 Difference]: Without dead ends: 415 [2021-11-25 18:30:56,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 177 SyntacticMatches, 15 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=618, Invalid=12720, Unknown=2, NotChecked=0, Total=13340 [2021-11-25 18:30:56,696 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 4806 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 4806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:56,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1105 Invalid, 4959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 4806 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 18:30:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-25 18:30:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 276. [2021-11-25 18:30:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 219 states have internal predecessors, (227), 9 states have call successors, (9), 6 states have call predecessors, (9), 46 states have return successors, (66), 50 states have call predecessors, (66), 7 states have call successors, (66) [2021-11-25 18:30:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 302 transitions. [2021-11-25 18:30:56,711 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 302 transitions. Word has length 193 [2021-11-25 18:30:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:56,712 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 302 transitions. [2021-11-25 18:30:56,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (34), 34 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-25 18:30:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 302 transitions. [2021-11-25 18:30:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 18:30:56,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:56,714 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 15, 15, 15, 15, 15, 15, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:56,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:56,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 18:30:56,928 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:30:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2099529229, now seen corresponding path program 14 times [2021-11-25 18:30:56,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:56,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252730886] [2021-11-25 18:30:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:56,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 2 proven. 750 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-11-25 18:30:58,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:58,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252730886] [2021-11-25 18:30:58,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252730886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:58,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834789657] [2021-11-25 18:30:58,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:30:58,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:58,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:58,253 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:58,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 18:30:58,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-25 18:30:58,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:30:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-25 18:30:58,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 197 proven. 549 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-11-25 18:31:01,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:31:12,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834789657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536731426] [2021-11-25 18:31:12,289 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:31:12,289 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:31:12,289 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:31:12,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:31:12,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33] total 54 [2021-11-25 18:31:12,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620578922] [2021-11-25 18:31:12,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:31:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-25 18:31:12,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-25 18:31:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3041, Unknown=2, NotChecked=0, Total=3192 [2021-11-25 18:31:12,292 INFO L87 Difference]: Start difference. First operand 276 states and 302 transitions. Second operand has 55 states, 54 states have (on average 2.611111111111111) internal successors, (141), 53 states have internal predecessors, (141), 7 states have call successors, (9), 3 states have call predecessors, (9), 18 states have return successors, (32), 32 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 18:31:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:23,252 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2021-11-25 18:31:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-25 18:31:23,253 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.611111111111111) internal successors, (141), 53 states have internal predecessors, (141), 7 states have call successors, (9), 3 states have call predecessors, (9), 18 states have return successors, (32), 32 states have call predecessors, (32), 6 states have call successors, (32) Word has length 178 [2021-11-25 18:31:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:23,254 INFO L225 Difference]: With dead ends: 371 [2021-11-25 18:31:23,254 INFO L226 Difference]: Without dead ends: 362 [2021-11-25 18:31:23,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4934 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1156, Invalid=19148, Unknown=2, NotChecked=0, Total=20306 [2021-11-25 18:31:23,257 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 309 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 6302 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 6552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 6302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:23,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1294 Invalid, 6552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 6302 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 18:31:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-25 18:31:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 203. [2021-11-25 18:31:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 161 states have internal predecessors, (167), 6 states have call successors, (6), 4 states have call predecessors, (6), 34 states have return successors, (53), 37 states have call predecessors, (53), 5 states have call successors, (53) [2021-11-25 18:31:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 226 transitions. [2021-11-25 18:31:23,267 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 226 transitions. Word has length 178 [2021-11-25 18:31:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:23,268 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 226 transitions. [2021-11-25 18:31:23,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.611111111111111) internal successors, (141), 53 states have internal predecessors, (141), 7 states have call successors, (9), 3 states have call predecessors, (9), 18 states have return successors, (32), 32 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-25 18:31:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 226 transitions. [2021-11-25 18:31:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 18:31:23,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:23,270 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:23,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:23,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:23,496 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:31:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 257243998, now seen corresponding path program 13 times [2021-11-25 18:31:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483986607] [2021-11-25 18:31:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:23,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 887 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-25 18:31:25,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:25,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483986607] [2021-11-25 18:31:25,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483986607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:25,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159826105] [2021-11-25 18:31:25,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:31:25,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:25,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:25,532 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:31:25,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 18:31:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:26,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-25 18:31:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 887 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2021-11-25 18:31:29,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:31:42,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159826105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:42,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342247425] [2021-11-25 18:31:42,085 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:31:42,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:31:42,085 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:31:42,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:31:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2021-11-25 18:31:42,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087851837] [2021-11-25 18:31:42,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:31:42,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-25 18:31:42,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:42,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-25 18:31:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3741, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 18:31:42,088 INFO L87 Difference]: Start difference. First operand 203 states and 226 transitions. Second operand has 61 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (36), 36 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 18:31:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:49,585 INFO L93 Difference]: Finished difference Result 324 states and 352 transitions. [2021-11-25 18:31:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-25 18:31:49,585 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (36), 36 states have call predecessors, (36), 2 states have call successors, (36) Word has length 204 [2021-11-25 18:31:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:49,587 INFO L225 Difference]: With dead ends: 324 [2021-11-25 18:31:49,587 INFO L226 Difference]: Without dead ends: 323 [2021-11-25 18:31:49,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 16 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=621, Invalid=13659, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 18:31:49,589 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 272 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 5248 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 5400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 5248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:49,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1185 Invalid, 5400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 5248 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 18:31:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-25 18:31:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 208. [2021-11-25 18:31:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 165 states have internal predecessors, (171), 6 states have call successors, (6), 4 states have call predecessors, (6), 35 states have return successors, (55), 38 states have call predecessors, (55), 5 states have call successors, (55) [2021-11-25 18:31:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 232 transitions. [2021-11-25 18:31:49,601 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 232 transitions. Word has length 204 [2021-11-25 18:31:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:49,601 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 232 transitions. [2021-11-25 18:31:49,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (36), 36 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 18:31:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 232 transitions. [2021-11-25 18:31:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-25 18:31:49,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:49,604 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 17, 16, 16, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:31:49,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-25 18:31:49,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-25 18:31:49,829 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:31:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1848730481, now seen corresponding path program 15 times [2021-11-25 18:31:49,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:49,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306510681] [2021-11-25 18:31:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:49,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 6 proven. 1029 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-11-25 18:31:51,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306510681] [2021-11-25 18:31:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306510681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:31:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341739491] [2021-11-25 18:31:51,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:31:51,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:51,093 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:31:51,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 18:31:51,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:31:51,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:31:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:31:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 6 proven. 1029 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-11-25 18:31:54,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:32:49,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341739491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:49,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459022873] [2021-11-25 18:32:49,642 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:32:49,642 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:32:49,642 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:32:49,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:32:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 54 [2021-11-25 18:32:49,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652009202] [2021-11-25 18:32:49,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:32:49,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-25 18:32:49,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-25 18:32:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3302, Unknown=19, NotChecked=0, Total=3540 [2021-11-25 18:32:49,645 INFO L87 Difference]: Start difference. First operand 208 states and 232 transitions. Second operand has 55 states, 54 states have (on average 2.462962962962963) internal successors, (133), 54 states have internal predecessors, (133), 5 states have call successors, (6), 2 states have call predecessors, (6), 18 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-25 18:32:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:58,498 INFO L93 Difference]: Finished difference Result 381 states and 409 transitions. [2021-11-25 18:32:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-25 18:32:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.462962962962963) internal successors, (133), 54 states have internal predecessors, (133), 5 states have call successors, (6), 2 states have call predecessors, (6), 18 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) Word has length 201 [2021-11-25 18:32:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:58,500 INFO L225 Difference]: With dead ends: 381 [2021-11-25 18:32:58,500 INFO L226 Difference]: Without dead ends: 378 [2021-11-25 18:32:58,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 196 SyntacticMatches, 13 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 47.7s TimeCoverageRelationStatistics Valid=922, Invalid=13579, Unknown=19, NotChecked=0, Total=14520 [2021-11-25 18:32:58,503 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 6404 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 6573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 6404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:58,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 1442 Invalid, 6573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 6404 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 18:32:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-25 18:32:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 306. [2021-11-25 18:32:58,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 244 states have (on average 1.028688524590164) internal successors, (251), 243 states have internal predecessors, (251), 9 states have call successors, (9), 6 states have call predecessors, (9), 52 states have return successors, (73), 56 states have call predecessors, (73), 7 states have call successors, (73) [2021-11-25 18:32:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 333 transitions. [2021-11-25 18:32:58,517 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 333 transitions. Word has length 201 [2021-11-25 18:32:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:58,517 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 333 transitions. [2021-11-25 18:32:58,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.462962962962963) internal successors, (133), 54 states have internal predecessors, (133), 5 states have call successors, (6), 2 states have call predecessors, (6), 18 states have return successors, (32), 32 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-25 18:32:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 333 transitions. [2021-11-25 18:32:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-25 18:32:58,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:58,520 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:58,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 18:32:58,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-25 18:32:58,742 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:32:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1129027320, now seen corresponding path program 14 times [2021-11-25 18:32:58,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:58,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577074574] [2021-11-25 18:32:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:58,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1920 backedges. 0 proven. 984 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2021-11-25 18:33:00,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:00,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577074574] [2021-11-25 18:33:00,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577074574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105312055] [2021-11-25 18:33:00,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:33:00,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:00,603 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:00,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 18:33:01,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-25 18:33:01,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:33:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-25 18:33:01,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:33:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1920 backedges. 0 proven. 984 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2021-11-25 18:33:05,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:33:19,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105312055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:19,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [11937270] [2021-11-25 18:33:19,743 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:33:19,743 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:33:19,744 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:33:19,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:33:19,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-11-25 18:33:19,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575750405] [2021-11-25 18:33:19,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:33:19,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-25 18:33:19,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:33:19,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-25 18:33:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4117, Unknown=0, NotChecked=0, Total=4290 [2021-11-25 18:33:19,746 INFO L87 Difference]: Start difference. First operand 306 states and 333 transitions. Second operand has 64 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (38), 38 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 18:33:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:33:27,968 INFO L93 Difference]: Finished difference Result 453 states and 493 transitions. [2021-11-25 18:33:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-25 18:33:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (38), 38 states have call predecessors, (38), 2 states have call successors, (38) Word has length 215 [2021-11-25 18:33:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:33:27,970 INFO L225 Difference]: With dead ends: 453 [2021-11-25 18:33:27,970 INFO L226 Difference]: Without dead ends: 452 [2021-11-25 18:33:27,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 197 SyntacticMatches, 17 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=666, Invalid=15336, Unknown=0, NotChecked=0, Total=16002 [2021-11-25 18:33:27,972 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 285 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 5712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:33:27,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1227 Invalid, 5712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 5549 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 18:33:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-25 18:33:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 311. [2021-11-25 18:33:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 248 states have (on average 1.028225806451613) internal successors, (255), 247 states have internal predecessors, (255), 9 states have call successors, (9), 6 states have call predecessors, (9), 53 states have return successors, (75), 57 states have call predecessors, (75), 7 states have call successors, (75) [2021-11-25 18:33:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 339 transitions. [2021-11-25 18:33:27,987 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 339 transitions. Word has length 215 [2021-11-25 18:33:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:33:27,987 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 339 transitions. [2021-11-25 18:33:27,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (38), 38 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 18:33:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 339 transitions. [2021-11-25 18:33:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-25 18:33:27,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:33:27,990 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 17, 17, 17, 17, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:33:28,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 18:33:28,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 18:33:28,205 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:33:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:33:28,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1887296053, now seen corresponding path program 16 times [2021-11-25 18:33:28,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:33:28,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610795929] [2021-11-25 18:33:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:28,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:33:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 2 proven. 937 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-11-25 18:33:30,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610795929] [2021-11-25 18:33:30,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610795929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981823113] [2021-11-25 18:33:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:33:30,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:30,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:30,086 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:30,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 18:33:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-25 18:33:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:33:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 2 proven. 937 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-11-25 18:33:34,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:33:44,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981823113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:44,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570156770] [2021-11-25 18:33:44,479 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 18:33:44,479 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:33:44,480 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:33:44,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:33:44,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 57 [2021-11-25 18:33:44,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734681494] [2021-11-25 18:33:44,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:33:44,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-25 18:33:44,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:33:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-25 18:33:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3384, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 18:33:44,482 INFO L87 Difference]: Start difference. First operand 311 states and 339 transitions. Second operand has 58 states, 57 states have (on average 2.456140350877193) internal successors, (140), 57 states have internal predecessors, (140), 5 states have call successors, (5), 2 states have call predecessors, (5), 19 states have return successors, (34), 34 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-25 18:33:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:33:55,660 INFO L93 Difference]: Finished difference Result 404 states and 434 transitions. [2021-11-25 18:33:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 18:33:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.456140350877193) internal successors, (140), 57 states have internal predecessors, (140), 5 states have call successors, (5), 2 states have call predecessors, (5), 19 states have return successors, (34), 34 states have call predecessors, (34), 4 states have call successors, (34) Word has length 200 [2021-11-25 18:33:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:33:55,664 INFO L225 Difference]: With dead ends: 404 [2021-11-25 18:33:55,664 INFO L226 Difference]: Without dead ends: 401 [2021-11-25 18:33:55,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 187 SyntacticMatches, 14 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3324 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=777, Invalid=14723, Unknown=0, NotChecked=0, Total=15500 [2021-11-25 18:33:55,666 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 235 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 7040 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 7221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 7040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:33:55,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1557 Invalid, 7221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 7040 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-25 18:33:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-25 18:33:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 316. [2021-11-25 18:33:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 252 states have (on average 1.0277777777777777) internal successors, (259), 251 states have internal predecessors, (259), 9 states have call successors, (9), 6 states have call predecessors, (9), 54 states have return successors, (76), 58 states have call predecessors, (76), 7 states have call successors, (76) [2021-11-25 18:33:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 344 transitions. [2021-11-25 18:33:55,682 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 344 transitions. Word has length 200 [2021-11-25 18:33:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:33:55,683 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 344 transitions. [2021-11-25 18:33:55,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.456140350877193) internal successors, (140), 57 states have internal predecessors, (140), 5 states have call successors, (5), 2 states have call predecessors, (5), 19 states have return successors, (34), 34 states have call predecessors, (34), 4 states have call successors, (34) [2021-11-25 18:33:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 344 transitions. [2021-11-25 18:33:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-25 18:33:55,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:33:55,686 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-25 18:33:55,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-25 18:33:55,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 18:33:55,901 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-25 18:33:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:33:55,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1603464578, now seen corresponding path program 15 times [2021-11-25 18:33:55,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:33:55,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038459353] [2021-11-25 18:33:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:33:55,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:33:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2383 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2021-11-25 18:33:58,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:58,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038459353] [2021-11-25 18:33:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038459353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:58,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752255967] [2021-11-25 18:33:58,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:33:58,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:58,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:58,186 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:58,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38e014a-0209-4423-88ed-652305a8e1c1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 18:33:59,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:33:59,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:33:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-25 18:33:59,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:34:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2383 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2021-11-25 18:34:03,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:24,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752255967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:24,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708979909] [2021-11-25 18:36:24,021 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 18:36:24,021 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:24,021 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:36:24,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:24,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-11-25 18:36:24,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191503776] [2021-11-25 18:36:24,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:24,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-25 18:36:24,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-25 18:36:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4790, Unknown=50, NotChecked=0, Total=5112 [2021-11-25 18:36:24,024 INFO L87 Difference]: Start difference. First operand 316 states and 344 transitions. Second operand has 67 states, 66 states have (on average 2.3636363636363638) internal successors, (156), 66 states have internal predecessors, (156), 3 states have call successors, (4), 2 states have call predecessors, (4), 21 states have return successors, (40), 40 states have call predecessors, (40), 2 states have call successors, (40)