./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/recHanoi01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF --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 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:30:37,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:30:37,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:30:37,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:30:37,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:30:37,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:30:37,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:30:37,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:30:37,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:30:37,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:30:37,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:30:37,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:30:37,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:30:37,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:30:37,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:30:37,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:30:37,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:30:37,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:30:37,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:30:37,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:30:37,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:30:37,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:30:37,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:30:37,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:30:37,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:30:37,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:30:37,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:30:37,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:30:37,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:30:37,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:30:37,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:30:37,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:30:37,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:30:37,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:30:37,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:30:37,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:30:37,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:30:37,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:30:37,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:30:37,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:30:37,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:30:37,435 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-12 23:30:37,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:30:37,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:30:37,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:30:37,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:30:37,486 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:30:37,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:30:37,487 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:30:37,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:30:37,493 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:30:37,494 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:30:37,495 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:30:37,495 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:30:37,495 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:30:37,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:30:37,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:30:37,496 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:30:37,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:30:37,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:30:37,497 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 23:30:37,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:30:37,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:30:37,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:30:37,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:30:37,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:30:37,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:30:37,499 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-12 23:30:37,499 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:30:37,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:30:37,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:30:37,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:30:37,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:30:37,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:30:37,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:30:37,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:30:37,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:30:37,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:30:37,503 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:30:37,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:30:37,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:30:37,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:30:37,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:30:37,504 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_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 [2021-11-12 23:30:37,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:30:37,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:30:37,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:30:37,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:30:37,823 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:30:37,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/recursive/recHanoi01.c [2021-11-12 23:30:37,888 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/data/4e3b22e4a/d0806296b919456bb8c694832fef50b5/FLAG7c074d318 [2021-11-12 23:30:38,326 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:30:38,327 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/sv-benchmarks/c/recursive/recHanoi01.c [2021-11-12 23:30:38,345 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/data/4e3b22e4a/d0806296b919456bb8c694832fef50b5/FLAG7c074d318 [2021-11-12 23:30:38,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/data/4e3b22e4a/d0806296b919456bb8c694832fef50b5 [2021-11-12 23:30:38,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:30:38,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:30:38,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:38,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:30:38,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:30:38,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:38" (1/1) ... [2021-11-12 23:30:38,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693a7717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:38, skipping insertion in model container [2021-11-12 23:30:38,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:30:38" (1/1) ... [2021-11-12 23:30:38,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:30:38,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:30:38,994 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/sv-benchmarks/c/recursive/recHanoi01.c[1213,1226] [2021-11-12 23:30:38,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:39,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:30:39,020 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/sv-benchmarks/c/recursive/recHanoi01.c[1213,1226] [2021-11-12 23:30:39,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:30:39,040 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:30:39,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39 WrapperNode [2021-11-12 23:30:39,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:30:39,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:30:39,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:30:39,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:30:39,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,061 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:30:39,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:30:39,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:30:39,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:30:39,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:30:39,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:30:39,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:30:39,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:30:39,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (1/1) ... [2021-11-12 23:30:39,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:30:39,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:39,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:30:39,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:30:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2021-11-12 23:30:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2021-11-12 23:30:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-12 23:30:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-12 23:30:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:30:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:30:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:30:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:30:39,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:30:39,558 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:30:39,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:30:39 BoogieIcfgContainer [2021-11-12 23:30:39,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:30:39,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:30:39,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:30:39,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:30:39,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:30:38" (1/3) ... [2021-11-12 23:30:39,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c67055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:30:39, skipping insertion in model container [2021-11-12 23:30:39,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:30:39" (2/3) ... [2021-11-12 23:30:39,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c67055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:30:39, skipping insertion in model container [2021-11-12 23:30:39,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:30:39" (3/3) ... [2021-11-12 23:30:39,572 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2021-11-12 23:30:39,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:30:39,577 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-12 23:30:39,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:30:39,655 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 [2021-11-12 23:30:39,655 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-12 23:30:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 36 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-12 23:30:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 23:30:39,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:39,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 23:30:39,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1329392281, now seen corresponding path program 1 times [2021-11-12 23:30:39,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:39,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538445515] [2021-11-12 23:30:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:39,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:39,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:39,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538445515] [2021-11-12 23:30:39,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538445515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:39,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:39,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:30:39,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934356172] [2021-11-12 23:30:39,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:39,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:39,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:40,035 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 36 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-12 23:30:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:40,108 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-11-12 23:30:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2021-11-12 23:30:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:40,119 INFO L225 Difference]: With dead ends: 73 [2021-11-12 23:30:40,119 INFO L226 Difference]: Without dead ends: 65 [2021-11-12 23:30:40,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:40,125 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 30 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.39ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.17ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:40,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 126 Invalid, 20 Unknown, 0 Unchecked, 3.39ms Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 33.17ms Time] [2021-11-12 23:30:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-12 23:30:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-11-12 23:30:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 39 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-12 23:30:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-12 23:30:40,164 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 6 [2021-11-12 23:30:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-12 23:30:40,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-12 23:30:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-12 23:30:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 23:30:40,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:40,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:30:40,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1940693911, now seen corresponding path program 1 times [2021-11-12 23:30:40,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:40,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895226562] [2021-11-12 23:30:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:40,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:40,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:40,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895226562] [2021-11-12 23:30:40,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895226562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:40,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:40,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:30:40,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608515273] [2021-11-12 23:30:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:40,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:30:40,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:30:40,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:40,224 INFO L87 Difference]: Start difference. First operand 46 states and 51 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) [2021-11-12 23:30:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:40,372 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-12 23:30:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:40,373 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 [2021-11-12 23:30:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:40,379 INFO L225 Difference]: With dead ends: 46 [2021-11-12 23:30:40,381 INFO L226 Difference]: Without dead ends: 44 [2021-11-12 23:30:40,387 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 [2021-11-12 23:30:40,390 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.32ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:40,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 40 Unknown, 0 Unchecked, 4.32ms Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 85.67ms Time] [2021-11-12 23:30:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-12 23:30:40,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-12 23:30:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.5) internal successors, (39), 37 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-12 23:30:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-12 23:30:40,410 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 8 [2021-11-12 23:30:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:40,410 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-12 23:30:40,411 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) [2021-11-12 23:30:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-12 23:30:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:30:40,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:40,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:40,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:30:40,413 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting applyHanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -31969055, now seen corresponding path program 1 times [2021-11-12 23:30:40,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:40,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381303977] [2021-11-12 23:30:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:40,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:40,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:40,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381303977] [2021-11-12 23:30:40,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381303977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:40,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:40,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:30:40,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633822670] [2021-11-12 23:30:40,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:40,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:30:40,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:30:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:40,473 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-12 23:30:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:40,547 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-11-12 23:30:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:30:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2021-11-12 23:30:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:40,552 INFO L225 Difference]: With dead ends: 73 [2021-11-12 23:30:40,552 INFO L226 Difference]: Without dead ends: 50 [2021-11-12 23:30:40,553 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 [2021-11-12 23:30:40,554 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:40,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 41 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 49.73ms Time] [2021-11-12 23:30:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-12 23:30:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-12 23:30:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.4) internal successors, (42), 41 states have internal predecessors, (42), 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) [2021-11-12 23:30:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-11-12 23:30:40,565 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 9 [2021-11-12 23:30:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:40,565 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-11-12 23:30:40,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-12 23:30:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-11-12 23:30:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-12 23:30:40,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:40,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:40,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:30:40,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:40,568 INFO L85 PathProgramCache]: Analyzing trace with hash -485709050, now seen corresponding path program 1 times [2021-11-12 23:30:40,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:40,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013988768] [2021-11-12 23:30:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:40,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:40,645 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:40,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013988768] [2021-11-12 23:30:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013988768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:40,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383588375] [2021-11-12 23:30:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:40,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:40,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:40,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:40,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:30:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:30:40,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:40,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:41,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383588375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:41,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [862915242] [2021-11-12 23:30:41,041 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:30:41,041 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:41,046 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) [2021-11-12 23:30:41,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:41,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-12 23:30:41,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207949421] [2021-11-12 23:30:41,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:41,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:41,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:41,059 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:41,301 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-11-12 23:30:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:30:41,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-12 23:30:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:41,305 INFO L225 Difference]: With dead ends: 160 [2021-11-12 23:30:41,306 INFO L226 Difference]: Without dead ends: 159 [2021-11-12 23:30:41,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:30:41,308 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 141 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.04ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:41,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 378 Invalid, 116 Unknown, 0 Unchecked, 10.04ms Time], IncrementalHoareTripleChecker [22 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 126.63ms Time] [2021-11-12 23:30:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-12 23:30:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 88. [2021-11-12 23:30:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 71 states have internal predecessors, (79), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2021-11-12 23:30:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2021-11-12 23:30:41,329 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 13 [2021-11-12 23:30:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:41,329 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2021-11-12 23:30:41,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2021-11-12 23:30:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 23:30:41,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:41,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:41,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:41,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:41,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2122888672, now seen corresponding path program 1 times [2021-11-12 23:30:41,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:41,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950142941] [2021-11-12 23:30:41,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:41,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:41,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:41,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950142941] [2021-11-12 23:30:41,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950142941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:41,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45769708] [2021-11-12 23:30:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:41,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:41,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:41,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:41,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 23:30:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:41,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:41,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45769708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:41,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 9 [2021-11-12 23:30:41,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792193212] [2021-11-12 23:30:41,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:41,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:30:41,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:41,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:30:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:30:41,826 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-11-12 23:30:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:41,880 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2021-11-12 23:30:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 14 [2021-11-12 23:30:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:41,887 INFO L225 Difference]: With dead ends: 88 [2021-11-12 23:30:41,887 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 23:30:41,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:30:41,890 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:41,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 108 Invalid, 21 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [12 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 23.25ms Time] [2021-11-12 23:30:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 23:30:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-12 23:30:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 70 states have internal predecessors, (76), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2021-11-12 23:30:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2021-11-12 23:30:41,919 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 14 [2021-11-12 23:30:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:41,920 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2021-11-12 23:30:41,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-11-12 23:30:41,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2021-11-12 23:30:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 23:30:41,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:41,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:41,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:42,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:42,132 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting applyHanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -13450526, now seen corresponding path program 1 times [2021-11-12 23:30:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:42,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45454188] [2021-11-12 23:30:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:42,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:42,200 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:42,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45454188] [2021-11-12 23:30:42,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45454188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:42,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879283668] [2021-11-12 23:30:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:42,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:42,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 23:30:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:42,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:42,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:42,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879283668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:42,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21316778] [2021-11-12 23:30:42,424 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:30:42,424 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:42,425 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) [2021-11-12 23:30:42,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:42,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-12 23:30:42,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624988036] [2021-11-12 23:30:42,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:42,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:42,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:42,430 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand has 12 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:42,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:42,543 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2021-11-12 23:30:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:30:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 23:30:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:42,545 INFO L225 Difference]: With dead ends: 93 [2021-11-12 23:30:42,546 INFO L226 Difference]: Without dead ends: 91 [2021-11-12 23:30:42,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:42,549 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:42,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 147 Invalid, 89 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [27 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 74.89ms Time] [2021-11-12 23:30:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-12 23:30:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-12 23:30:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-12 23:30:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-11-12 23:30:42,588 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 16 [2021-11-12 23:30:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:42,588 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-11-12 23:30:42,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-11-12 23:30:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 23:30:42,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:42,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:42,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:42,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:42,803 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -160663387, now seen corresponding path program 1 times [2021-11-12 23:30:42,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:42,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137511755] [2021-11-12 23:30:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:42,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:30:42,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:42,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137511755] [2021-11-12 23:30:42,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137511755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:42,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953706484] [2021-11-12 23:30:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:42,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:42,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:42,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:42,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:30:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:30:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:43,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:43,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953706484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:43,173 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:30:43,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 13 [2021-11-12 23:30:43,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714163458] [2021-11-12 23:30:43,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:43,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:30:43,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:30:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:30:43,175 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 8 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:30:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:43,232 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2021-11-12 23:30:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:30:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-12 23:30:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:43,236 INFO L225 Difference]: With dead ends: 91 [2021-11-12 23:30:43,236 INFO L226 Difference]: Without dead ends: 90 [2021-11-12 23:30:43,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:30:43,240 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:43,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 126 Invalid, 32 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 35.79ms Time] [2021-11-12 23:30:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-12 23:30:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-12 23:30:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.180327868852459) internal successors, (72), 70 states have internal predecessors, (72), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-12 23:30:43,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-11-12 23:30:43,267 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 27 [2021-11-12 23:30:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:43,268 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-11-12 23:30:43,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:30:43,268 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-11-12 23:30:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 23:30:43,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:43,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:43,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:43,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-12 23:30:43,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash -685597643, now seen corresponding path program 1 times [2021-11-12 23:30:43,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:43,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341526179] [2021-11-12 23:30:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:43,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:43,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341526179] [2021-11-12 23:30:43,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341526179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:43,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:43,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:30:43,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708136726] [2021-11-12 23:30:43,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:43,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:30:43,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:30:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:30:43,546 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 23:30:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:43,586 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2021-11-12 23:30:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:30:43,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-12 23:30:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:43,588 INFO L225 Difference]: With dead ends: 109 [2021-11-12 23:30:43,588 INFO L226 Difference]: Without dead ends: 106 [2021-11-12 23:30:43,589 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 [2021-11-12 23:30:43,590 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:43,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 24.12ms Time] [2021-11-12 23:30:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-12 23:30:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-11-12 23:30:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.2) internal successors, (84), 78 states have internal predecessors, (84), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-12 23:30:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2021-11-12 23:30:43,604 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 28 [2021-11-12 23:30:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2021-11-12 23:30:43,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 23:30:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2021-11-12 23:30:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-12 23:30:43,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:43,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:43,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:30:43,607 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -505282032, now seen corresponding path program 1 times [2021-11-12 23:30:43,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:43,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155745859] [2021-11-12 23:30:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:43,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:43,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:43,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155745859] [2021-11-12 23:30:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155745859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:43,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355632022] [2021-11-12 23:30:43,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:43,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:43,713 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 23:30:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:43,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:43,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:43,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:30:44,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355632022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:44,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736229137] [2021-11-12 23:30:44,070 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-12 23:30:44,070 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:44,071 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) [2021-11-12 23:30:44,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:44,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-12 23:30:44,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767313546] [2021-11-12 23:30:44,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:44,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:30:44,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:30:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:44,077 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:30:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:44,267 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-11-12 23:30:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:30:44,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-11-12 23:30:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:44,273 INFO L225 Difference]: With dead ends: 161 [2021-11-12 23:30:44,273 INFO L226 Difference]: Without dead ends: 160 [2021-11-12 23:30:44,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:30:44,277 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 189 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.53ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.60ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:44,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 214 Invalid, 113 Unknown, 0 Unchecked, 6.53ms Time], IncrementalHoareTripleChecker [38 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 93.60ms Time] [2021-11-12 23:30:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-12 23:30:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 136. [2021-11-12 23:30:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 100 states have (on average 1.29) internal successors, (129), 108 states have internal predecessors, (129), 18 states have call successors, (18), 10 states have call predecessors, (18), 12 states have return successors, (35), 17 states have call predecessors, (35), 17 states have call successors, (35) [2021-11-12 23:30:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 182 transitions. [2021-11-12 23:30:44,303 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 182 transitions. Word has length 33 [2021-11-12 23:30:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:44,304 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 182 transitions. [2021-11-12 23:30:44,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-12 23:30:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 182 transitions. [2021-11-12 23:30:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 23:30:44,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:44,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-12 23:30:44,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:44,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:44,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash -79127641, now seen corresponding path program 2 times [2021-11-12 23:30:44,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:44,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967500557] [2021-11-12 23:30:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:44,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:44,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:44,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967500557] [2021-11-12 23:30:44,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967500557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:44,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673110404] [2021-11-12 23:30:44,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:44,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:44,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:44,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:30:44,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-12 23:30:44,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:44,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:30:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:44,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:45,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673110404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:45,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676000415] [2021-11-12 23:30:45,109 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:30:45,109 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:45,110 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) [2021-11-12 23:30:45,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:45,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-11-12 23:30:45,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714295484] [2021-11-12 23:30:45,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:30:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:30:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:30:45,118 INFO L87 Difference]: Start difference. First operand 136 states and 182 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:45,680 INFO L93 Difference]: Finished difference Result 834 states and 1188 transitions. [2021-11-12 23:30:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 23:30:45,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-12 23:30:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:45,688 INFO L225 Difference]: With dead ends: 834 [2021-11-12 23:30:45,688 INFO L226 Difference]: Without dead ends: 833 [2021-11-12 23:30:45,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:30:45,691 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 543 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 295.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.58ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:45,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 590 Invalid, 352 Unknown, 0 Unchecked, 12.58ms Time], IncrementalHoareTripleChecker [113 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 365.71ms Time] [2021-11-12 23:30:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-12 23:30:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 238. [2021-11-12 23:30:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 186 states have internal predecessors, (207), 36 states have call successors, (36), 16 states have call predecessors, (36), 24 states have return successors, (164), 35 states have call predecessors, (164), 35 states have call successors, (164) [2021-11-12 23:30:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2021-11-12 23:30:45,730 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 34 [2021-11-12 23:30:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:45,730 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2021-11-12 23:30:45,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2021-11-12 23:30:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-12 23:30:45,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:45,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:45,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:45,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:45,955 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash -245226102, now seen corresponding path program 1 times [2021-11-12 23:30:45,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:45,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346270050] [2021-11-12 23:30:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:45,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:30:46,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:46,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346270050] [2021-11-12 23:30:46,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346270050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:46,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:30:46,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:30:46,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547473136] [2021-11-12 23:30:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:30:46,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:30:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:46,032 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:30:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:46,076 INFO L93 Difference]: Finished difference Result 275 states and 460 transitions. [2021-11-12 23:30:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:30:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-11-12 23:30:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:46,080 INFO L225 Difference]: With dead ends: 275 [2021-11-12 23:30:46,081 INFO L226 Difference]: Without dead ends: 264 [2021-11-12 23:30:46,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:30:46,093 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.66ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:46,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 25 Unknown, 0 Unchecked, 0.66ms Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 23.22ms Time] [2021-11-12 23:30:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-12 23:30:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-11-12 23:30:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 208 states have internal predecessors, (229), 36 states have call successors, (36), 16 states have call predecessors, (36), 27 states have return successors, (168), 39 states have call predecessors, (168), 35 states have call successors, (168) [2021-11-12 23:30:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 433 transitions. [2021-11-12 23:30:46,134 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 433 transitions. Word has length 35 [2021-11-12 23:30:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 433 transitions. [2021-11-12 23:30:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 23:30:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 433 transitions. [2021-11-12 23:30:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 23:30:46,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:46,140 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:46,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:30:46,141 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash -880024075, now seen corresponding path program 2 times [2021-11-12 23:30:46,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:46,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332877946] [2021-11-12 23:30:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:46,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:30:46,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:46,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332877946] [2021-11-12 23:30:46,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332877946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:46,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413891844] [2021-11-12 23:30:46,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:46,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:46,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:46,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:46,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:30:46,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:30:46,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:30:46,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:30:46,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 23:30:46,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413891844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:46,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179876502] [2021-11-12 23:30:46,797 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-12 23:30:46,797 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:46,797 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) [2021-11-12 23:30:46,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:46,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 24 [2021-11-12 23:30:46,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081014840] [2021-11-12 23:30:46,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:46,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:30:46,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:30:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:30:46,802 INFO L87 Difference]: Start difference. First operand 264 states and 433 transitions. Second operand has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-12 23:30:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:47,187 INFO L93 Difference]: Finished difference Result 610 states and 1109 transitions. [2021-11-12 23:30:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-12 23:30:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-12 23:30:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:47,191 INFO L225 Difference]: With dead ends: 610 [2021-11-12 23:30:47,191 INFO L226 Difference]: Without dead ends: 354 [2021-11-12 23:30:47,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 23:30:47,197 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 241 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:47,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 340 Invalid, 409 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [75 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 206.62ms Time] [2021-11-12 23:30:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-12 23:30:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 332. [2021-11-12 23:30:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 248 states have (on average 1.153225806451613) internal successors, (286), 251 states have internal predecessors, (286), 44 states have call successors, (44), 26 states have call predecessors, (44), 34 states have return successors, (196), 54 states have call predecessors, (196), 43 states have call successors, (196) [2021-11-12 23:30:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 526 transitions. [2021-11-12 23:30:47,235 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 526 transitions. Word has length 48 [2021-11-12 23:30:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:47,235 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 526 transitions. [2021-11-12 23:30:47,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-12 23:30:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 526 transitions. [2021-11-12 23:30:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:30:47,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:47,238 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:47,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:47,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-12 23:30:47,459 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 888955120, now seen corresponding path program 1 times [2021-11-12 23:30:47,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:47,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521817717] [2021-11-12 23:30:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:47,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-12 23:30:47,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:47,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521817717] [2021-11-12 23:30:47,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521817717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:47,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043724748] [2021-11-12 23:30:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:47,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:47,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:47,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 23:30:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:47,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:30:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:30:47,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 23:30:48,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043724748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:48,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707587981] [2021-11-12 23:30:48,488 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-12 23:30:48,488 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:48,488 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) [2021-11-12 23:30:48,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:48,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 15] total 21 [2021-11-12 23:30:48,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737624258] [2021-11-12 23:30:48,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:48,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-12 23:30:48,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-12 23:30:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:30:48,492 INFO L87 Difference]: Start difference. First operand 332 states and 526 transitions. Second operand has 21 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 10 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-12 23:30:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:48,997 INFO L93 Difference]: Finished difference Result 540 states and 917 transitions. [2021-11-12 23:30:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 23:30:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 10 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) Word has length 79 [2021-11-12 23:30:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:49,003 INFO L225 Difference]: With dead ends: 540 [2021-11-12 23:30:49,003 INFO L226 Difference]: Without dead ends: 453 [2021-11-12 23:30:49,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-11-12 23:30:49,006 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 145 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 218.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 263.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:49,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 148 Invalid, 463 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [39 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 263.46ms Time] [2021-11-12 23:30:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-12 23:30:49,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 431. [2021-11-12 23:30:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 323 states have (on average 1.1393188854489165) internal successors, (368), 324 states have internal predecessors, (368), 59 states have call successors, (59), 32 states have call predecessors, (59), 43 states have return successors, (285), 74 states have call predecessors, (285), 52 states have call successors, (285) [2021-11-12 23:30:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 712 transitions. [2021-11-12 23:30:49,059 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 712 transitions. Word has length 79 [2021-11-12 23:30:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:49,060 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 712 transitions. [2021-11-12 23:30:49,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 10 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-12 23:30:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 712 transitions. [2021-11-12 23:30:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 23:30:49,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:49,064 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2021-11-12 23:30:49,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:49,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-12 23:30:49,291 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:49,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:49,291 INFO L85 PathProgramCache]: Analyzing trace with hash 57909511, now seen corresponding path program 3 times [2021-11-12 23:30:49,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:49,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609354135] [2021-11-12 23:30:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:49,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:49,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:49,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609354135] [2021-11-12 23:30:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609354135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:49,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225311976] [2021-11-12 23:30:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:30:49,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:49,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:49,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-12 23:30:49,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:30:49,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-12 23:30:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:49,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:50,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225311976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:50,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419655637] [2021-11-12 23:30:50,622 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:30:50,622 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:50,623 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) [2021-11-12 23:30:50,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:50,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2021-11-12 23:30:50,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475539049] [2021-11-12 23:30:50,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:50,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-12 23:30:50,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-12 23:30:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 23:30:50,627 INFO L87 Difference]: Start difference. First operand 431 states and 712 transitions. Second operand has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 48 states have internal predecessors, (134), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:52,552 INFO L93 Difference]: Finished difference Result 3544 states and 5639 transitions. [2021-11-12 23:30:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-12 23:30:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 48 states have internal predecessors, (134), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-12 23:30:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:52,594 INFO L225 Difference]: With dead ends: 3544 [2021-11-12 23:30:52,594 INFO L226 Difference]: Without dead ends: 3543 [2021-11-12 23:30:52,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1382, Invalid=3448, Unknown=0, NotChecked=0, Total=4830 [2021-11-12 23:30:52,599 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 1280 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 942.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.38ms SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1128.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:52,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1240 Invalid, 1476 Unknown, 0 Unchecked, 28.38ms Time], IncrementalHoareTripleChecker [671 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1128.41ms Time] [2021-11-12 23:30:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-11-12 23:30:52,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 755. [2021-11-12 23:30:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 551 states have (on average 1.103448275862069) internal successors, (608), 552 states have internal predecessors, (608), 119 states have call successors, (119), 56 states have call predecessors, (119), 79 states have return successors, (1617), 146 states have call predecessors, (1617), 112 states have call successors, (1617) [2021-11-12 23:30:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2344 transitions. [2021-11-12 23:30:52,815 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2344 transitions. Word has length 76 [2021-11-12 23:30:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:52,816 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2344 transitions. [2021-11-12 23:30:52,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 48 states have internal predecessors, (134), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2344 transitions. [2021-11-12 23:30:52,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:30:52,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:52,821 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:52,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:53,036 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash -793022864, now seen corresponding path program 3 times [2021-11-12 23:30:53,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:53,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200259294] [2021-11-12 23:30:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:53,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:53,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 19 proven. 112 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:30:53,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:53,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200259294] [2021-11-12 23:30:53,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200259294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:53,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470825387] [2021-11-12 23:30:53,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:30:53,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:53,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:53,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:30:53,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:30:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:53,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:30:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 40 proven. 53 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:30:53,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-12 23:30:54,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470825387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:54,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452784992] [2021-11-12 23:30:54,096 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-12 23:30:54,096 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:54,096 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) [2021-11-12 23:30:54,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:54,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 13] total 31 [2021-11-12 23:30:54,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151174582] [2021-11-12 23:30:54,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:54,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-12 23:30:54,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-12 23:30:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:30:54,100 INFO L87 Difference]: Start difference. First operand 755 states and 2344 transitions. Second operand has 31 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 21 states have internal predecessors, (89), 18 states have call successors, (20), 10 states have call predecessors, (20), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-12 23:30:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:54,705 INFO L93 Difference]: Finished difference Result 1776 states and 5617 transitions. [2021-11-12 23:30:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:30:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 21 states have internal predecessors, (89), 18 states have call successors, (20), 10 states have call predecessors, (20), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 85 [2021-11-12 23:30:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:54,722 INFO L225 Difference]: With dead ends: 1776 [2021-11-12 23:30:54,723 INFO L226 Difference]: Without dead ends: 1042 [2021-11-12 23:30:54,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2021-11-12 23:30:54,745 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 289.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.11ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 361.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:54,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 414 Invalid, 630 Unknown, 0 Unchecked, 6.11ms Time], IncrementalHoareTripleChecker [55 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 361.87ms Time] [2021-11-12 23:30:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-11-12 23:30:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 874. [2021-11-12 23:30:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 663 states have (on average 1.0829562594268476) internal successors, (718), 645 states have internal predecessors, (718), 118 states have call successors, (118), 88 states have call predecessors, (118), 88 states have return successors, (489), 140 states have call predecessors, (489), 117 states have call successors, (489) [2021-11-12 23:30:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1325 transitions. [2021-11-12 23:30:54,837 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1325 transitions. Word has length 85 [2021-11-12 23:30:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:54,837 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1325 transitions. [2021-11-12 23:30:54,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 21 states have internal predecessors, (89), 18 states have call successors, (20), 10 states have call predecessors, (20), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-12 23:30:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1325 transitions. [2021-11-12 23:30:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:30:54,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:54,844 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:54,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:55,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:55,059 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting hanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1232791888, now seen corresponding path program 1 times [2021-11-12 23:30:55,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:55,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959146631] [2021-11-12 23:30:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:55,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-12 23:30:55,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:55,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959146631] [2021-11-12 23:30:55,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959146631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:55,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075184084] [2021-11-12 23:30:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:55,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:55,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:55,212 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:55,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:30:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:55,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:30:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-12 23:30:55,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-12 23:30:56,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075184084] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:56,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:30:56,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2021-11-12 23:30:56,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739042995] [2021-11-12 23:30:56,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:56,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:30:56,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:56,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:30:56,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:56,149 INFO L87 Difference]: Start difference. First operand 874 states and 1325 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-12 23:30:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:56,204 INFO L93 Difference]: Finished difference Result 874 states and 1325 transitions. [2021-11-12 23:30:56,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:30:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 144 [2021-11-12 23:30:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:56,213 INFO L225 Difference]: With dead ends: 874 [2021-11-12 23:30:56,213 INFO L226 Difference]: Without dead ends: 858 [2021-11-12 23:30:56,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:30:56,215 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:56,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 20.91ms Time] [2021-11-12 23:30:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-11-12 23:30:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2021-11-12 23:30:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 651 states have (on average 1.055299539170507) internal successors, (687), 631 states have internal predecessors, (687), 118 states have call successors, (118), 88 states have call predecessors, (118), 86 states have return successors, (487), 138 states have call predecessors, (487), 117 states have call successors, (487) [2021-11-12 23:30:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1292 transitions. [2021-11-12 23:30:56,286 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1292 transitions. Word has length 144 [2021-11-12 23:30:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:56,286 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1292 transitions. [2021-11-12 23:30:56,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-12 23:30:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1292 transitions. [2021-11-12 23:30:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-12 23:30:56,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:56,291 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:30:56,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:56,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-12 23:30:56,519 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 990876778, now seen corresponding path program 2 times [2021-11-12 23:30:56,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:56,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517643330] [2021-11-12 23:30:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:56,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2021-11-12 23:30:56,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:56,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517643330] [2021-11-12 23:30:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517643330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:56,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464920307] [2021-11-12 23:30:56,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:30:56,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:56,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:56,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:56,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-12 23:30:56,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 23:30:56,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:30:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:30:56,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2021-11-12 23:30:57,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2021-11-12 23:30:57,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464920307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:57,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [500803683] [2021-11-12 23:30:57,518 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-12 23:30:57,518 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:30:57,518 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) [2021-11-12 23:30:57,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:57,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-12 23:30:57,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188968043] [2021-11-12 23:30:57,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:30:57,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:30:57,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:30:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:30:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:57,522 INFO L87 Difference]: Start difference. First operand 858 states and 1292 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 16 states have internal predecessors, (55), 1 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:30:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:57,618 INFO L93 Difference]: Finished difference Result 1003 states and 1479 transitions. [2021-11-12 23:30:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:30:57,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 16 states have internal predecessors, (55), 1 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 1 states have call successors, (10) Word has length 155 [2021-11-12 23:30:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:57,629 INFO L225 Difference]: With dead ends: 1003 [2021-11-12 23:30:57,629 INFO L226 Difference]: Without dead ends: 890 [2021-11-12 23:30:57,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:30:57,632 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.75ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:57,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 192 Invalid, 69 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 57.75ms Time] [2021-11-12 23:30:57,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-12 23:30:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-11-12 23:30:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 679 states have (on average 1.041237113402062) internal successors, (707), 656 states have internal predecessors, (707), 118 states have call successors, (118), 88 states have call predecessors, (118), 91 states have return successors, (494), 145 states have call predecessors, (494), 117 states have call successors, (494) [2021-11-12 23:30:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1319 transitions. [2021-11-12 23:30:57,735 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1319 transitions. Word has length 155 [2021-11-12 23:30:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:57,736 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1319 transitions. [2021-11-12 23:30:57,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 16 states have internal predecessors, (55), 1 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-12 23:30:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1319 transitions. [2021-11-12 23:30:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-12 23:30:57,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:57,746 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1] [2021-11-12 23:30:57,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:57,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-12 23:30:57,971 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:30:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -385252409, now seen corresponding path program 4 times [2021-11-12 23:30:57,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:30:57,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157286743] [2021-11-12 23:30:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:57,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:30:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:59,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:30:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157286743] [2021-11-12 23:30:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157286743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212117034] [2021-11-12 23:30:59,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:30:59,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:59,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:59,022 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:59,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 23:30:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-12 23:30:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:30:59,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:01,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212117034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:01,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80507331] [2021-11-12 23:31:01,753 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:31:01,753 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:31:01,754 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) [2021-11-12 23:31:01,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:31:01,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2021-11-12 23:31:01,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507253564] [2021-11-12 23:31:01,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:01,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-12 23:31:01,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-12 23:31:01,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2021-11-12 23:31:01,761 INFO L87 Difference]: Start difference. First operand 890 states and 1319 transitions. Second operand has 96 states, 95 states have (on average 2.9263157894736844) internal successors, (278), 96 states have internal predecessors, (278), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:07,205 INFO L93 Difference]: Finished difference Result 4921 states and 6635 transitions. [2021-11-12 23:31:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-12 23:31:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 2.9263157894736844) internal successors, (278), 96 states have internal predecessors, (278), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-12 23:31:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:07,245 INFO L225 Difference]: With dead ends: 4921 [2021-11-12 23:31:07,245 INFO L226 Difference]: Without dead ends: 4920 [2021-11-12 23:31:07,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5642, Invalid=14380, Unknown=0, NotChecked=0, Total=20022 [2021-11-12 23:31:07,255 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 2579 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 1921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2472.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 4341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.41ms SdHoareTripleChecker+Time, 1921 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3007.52ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 2012 Invalid, 4341 Unknown, 0 Unchecked, 55.41ms Time], IncrementalHoareTripleChecker [1921 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 3007.52ms Time] [2021-11-12 23:31:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-11-12 23:31:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 1718. [2021-11-12 23:31:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1303 states have (on average 1.0399079048349962) internal successors, (1355), 1256 states have internal predecessors, (1355), 250 states have call successors, (250), 184 states have call predecessors, (250), 163 states have return successors, (1580), 277 states have call predecessors, (1580), 249 states have call successors, (1580) [2021-11-12 23:31:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 3185 transitions. [2021-11-12 23:31:07,492 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 3185 transitions. Word has length 160 [2021-11-12 23:31:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:07,493 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 3185 transitions. [2021-11-12 23:31:07,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 2.9263157894736844) internal successors, (278), 96 states have internal predecessors, (278), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 3185 transitions. [2021-11-12 23:31:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 23:31:07,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:07,502 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:07,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:07,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:07,719 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:31:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:07,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1013191190, now seen corresponding path program 3 times [2021-11-12 23:31:07,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:07,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966060849] [2021-11-12 23:31:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:07,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-12 23:31:07,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:07,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966060849] [2021-11-12 23:31:07,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966060849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:07,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766869030] [2021-11-12 23:31:07,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:31:07,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:07,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:07,890 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:07,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:31:07,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:31:07,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:31:07,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 164 proven. 246 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-12 23:31:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 164 proven. 333 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-11-12 23:31:11,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766869030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:11,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621905092] [2021-11-12 23:31:11,011 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-12 23:31:11,011 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:31:11,011 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) [2021-11-12 23:31:11,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:31:11,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 27] total 47 [2021-11-12 23:31:11,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102982919] [2021-11-12 23:31:11,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:11,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-12 23:31:11,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-12 23:31:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1941, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 23:31:11,016 INFO L87 Difference]: Start difference. First operand 1718 states and 3185 transitions. Second operand has 47 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 43 states have internal predecessors, (174), 20 states have call successors, (24), 3 states have call predecessors, (24), 20 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2021-11-12 23:31:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:12,616 INFO L93 Difference]: Finished difference Result 2531 states and 7860 transitions. [2021-11-12 23:31:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 23:31:12,617 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 43 states have internal predecessors, (174), 20 states have call successors, (24), 3 states have call predecessors, (24), 20 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) Word has length 203 [2021-11-12 23:31:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:12,681 INFO L225 Difference]: With dead ends: 2531 [2021-11-12 23:31:12,681 INFO L226 Difference]: Without dead ends: 2194 [2021-11-12 23:31:12,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1017, Invalid=6465, Unknown=0, NotChecked=0, Total=7482 [2021-11-12 23:31:12,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 503 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 585.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.18ms SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 693.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:12,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 319 Invalid, 1634 Unknown, 0 Unchecked, 5.18ms Time], IncrementalHoareTripleChecker [178 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 693.66ms Time] [2021-11-12 23:31:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-12 23:31:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2069. [2021-11-12 23:31:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1515 states have (on average 1.0343234323432344) internal successors, (1567), 1468 states have internal predecessors, (1567), 318 states have call successors, (318), 184 states have call predecessors, (318), 234 states have return successors, (3901), 416 states have call predecessors, (3901), 295 states have call successors, (3901) [2021-11-12 23:31:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5786 transitions. [2021-11-12 23:31:13,073 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5786 transitions. Word has length 203 [2021-11-12 23:31:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:13,073 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 5786 transitions. [2021-11-12 23:31:13,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 43 states have internal predecessors, (174), 20 states have call successors, (24), 3 states have call predecessors, (24), 20 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2021-11-12 23:31:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5786 transitions. [2021-11-12 23:31:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-12 23:31:13,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:13,139 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1] [2021-11-12 23:31:13,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:13,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:13,355 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:31:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash -371414713, now seen corresponding path program 5 times [2021-11-12 23:31:13,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:13,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467584558] [2021-11-12 23:31:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:13,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 7383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:16,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:16,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467584558] [2021-11-12 23:31:16,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467584558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:16,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345615591] [2021-11-12 23:31:16,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:31:16,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:16,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:16,367 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:16,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 23:31:16,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-12 23:31:16,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 189 conjunts are in the unsatisfiable core [2021-11-12 23:31:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 7383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:17,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 7383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:24,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345615591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:24,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853066156] [2021-11-12 23:31:24,524 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:31:24,524 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:31:24,524 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) [2021-11-12 23:31:24,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:31:24,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2021-11-12 23:31:24,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459766021] [2021-11-12 23:31:24,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:24,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-12 23:31:24,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-12 23:31:24,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9311, Invalid=27361, Unknown=0, NotChecked=0, Total=36672 [2021-11-12 23:31:24,543 INFO L87 Difference]: Start difference. First operand 2069 states and 5786 transitions. Second operand has 192 states, 191 states have (on average 2.9633507853403143) internal successors, (566), 192 states have internal predecessors, (566), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:46,853 INFO L93 Difference]: Finished difference Result 9480 states and 28240 transitions. [2021-11-12 23:31:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-12 23:31:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 2.9633507853403143) internal successors, (566), 192 states have internal predecessors, (566), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2021-11-12 23:31:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:47,058 INFO L225 Difference]: With dead ends: 9480 [2021-11-12 23:31:47,058 INFO L226 Difference]: Without dead ends: 9479 [2021-11-12 23:31:47,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18040 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=22802, Invalid=58708, Unknown=0, NotChecked=0, Total=81510 [2021-11-12 23:31:47,091 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 7856 mSDsluCounter, 4358 mSDsCounter, 0 mSdLazyCounter, 8180 mSolverCounterSat, 11635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8382.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7856 SdHoareTripleChecker+Valid, 4794 SdHoareTripleChecker+Invalid, 19815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 124.83ms SdHoareTripleChecker+Time, 11635 IncrementalHoareTripleChecker+Valid, 8180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10244.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:47,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7856 Valid, 4794 Invalid, 19815 Unknown, 0 Unchecked, 124.83ms Time], IncrementalHoareTripleChecker [11635 Valid, 8180 Invalid, 0 Unknown, 0 Unchecked, 10244.47ms Time] [2021-11-12 23:31:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-11-12 23:31:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4133. [2021-11-12 23:31:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 3003 states have (on average 1.0333000333000333) internal successors, (3103), 2908 states have internal predecessors, (3103), 654 states have call successors, (654), 376 states have call predecessors, (654), 474 states have return successors, (18721), 848 states have call predecessors, (18721), 607 states have call successors, (18721) [2021-11-12 23:31:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 22478 transitions. [2021-11-12 23:31:48,379 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 22478 transitions. Word has length 328 [2021-11-12 23:31:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:48,381 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 22478 transitions. [2021-11-12 23:31:48,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 2.9633507853403143) internal successors, (566), 192 states have internal predecessors, (566), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 22478 transitions. [2021-11-12 23:31:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-11-12 23:31:48,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:48,467 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 15, 14, 14, 14, 14, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:48,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:48,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:48,695 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:31:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash 368600336, now seen corresponding path program 4 times [2021-11-12 23:31:48,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:31:48,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336529921] [2021-11-12 23:31:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:31:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12190 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 12015 trivial. 0 not checked. [2021-11-12 23:31:49,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:31:49,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336529921] [2021-11-12 23:31:49,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336529921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:31:49,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863925131] [2021-11-12 23:31:49,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:31:49,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:49,045 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:49,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-12 23:31:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-12 23:31:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12190 backedges. 526 proven. 2139 refuted. 0 times theorem prover too weak. 9525 trivial. 0 not checked. [2021-11-12 23:31:51,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12190 backedges. 526 proven. 2295 refuted. 0 times theorem prover too weak. 9369 trivial. 0 not checked. [2021-11-12 23:31:55,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863925131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:55,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383234523] [2021-11-12 23:31:55,670 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-12 23:31:55,670 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:31:55,670 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) [2021-11-12 23:31:55,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:31:55,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 33, 45] total 79 [2021-11-12 23:31:55,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590043975] [2021-11-12 23:31:55,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:31:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-12 23:31:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:31:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-12 23:31:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=5606, Unknown=0, NotChecked=0, Total=6162 [2021-11-12 23:31:55,678 INFO L87 Difference]: Start difference. First operand 4133 states and 22478 transitions. Second operand has 79 states, 77 states have (on average 3.324675324675325) internal successors, (256), 63 states have internal predecessors, (256), 37 states have call successors, (41), 15 states have call predecessors, (41), 24 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-12 23:32:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:00,986 INFO L93 Difference]: Finished difference Result 5532 states and 35746 transitions. [2021-11-12 23:32:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-12 23:32:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 77 states have (on average 3.324675324675325) internal successors, (256), 63 states have internal predecessors, (256), 37 states have call successors, (41), 15 states have call predecessors, (41), 24 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) Word has length 629 [2021-11-12 23:32:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:01,292 INFO L225 Difference]: With dead ends: 5532 [2021-11-12 23:32:01,292 INFO L226 Difference]: Without dead ends: 5282 [2021-11-12 23:32:01,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1373 GetRequests, 1196 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8464 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3994, Invalid=27868, Unknown=0, NotChecked=0, Total=31862 [2021-11-12 23:32:01,434 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1244 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 5529 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1788.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 6238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.12ms SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 5529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2155.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:01,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 938 Invalid, 6238 Unknown, 0 Unchecked, 16.12ms Time], IncrementalHoareTripleChecker [709 Valid, 5529 Invalid, 0 Unknown, 0 Unchecked, 2155.27ms Time] [2021-11-12 23:32:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-11-12 23:32:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 4904. [2021-11-12 23:32:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4904 states, 3527 states have (on average 1.029770343067763) internal successors, (3632), 3429 states have internal predecessors, (3632), 796 states have call successors, (796), 383 states have call predecessors, (796), 579 states have return successors, (28219), 1091 states have call predecessors, (28219), 748 states have call successors, (28219) [2021-11-12 23:32:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4904 states to 4904 states and 32647 transitions. [2021-11-12 23:32:02,963 INFO L78 Accepts]: Start accepts. Automaton has 4904 states and 32647 transitions. Word has length 629 [2021-11-12 23:32:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:02,966 INFO L470 AbstractCegarLoop]: Abstraction has 4904 states and 32647 transitions. [2021-11-12 23:32:02,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 77 states have (on average 3.324675324675325) internal successors, (256), 63 states have internal predecessors, (256), 37 states have call successors, (41), 15 states have call predecessors, (41), 24 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-12 23:32:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4904 states and 32647 transitions. [2021-11-12 23:32:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2021-11-12 23:32:03,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:03,434 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 63, 14, 13, 13, 13, 13, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:32:03,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:03,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:03,659 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:32:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash -794062614, now seen corresponding path program 5 times [2021-11-12 23:32:03,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:32:03,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824059616] [2021-11-12 23:32:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:03,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:32:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 48272 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 48044 trivial. 0 not checked. [2021-11-12 23:32:04,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:32:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824059616] [2021-11-12 23:32:04,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824059616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:32:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792510522] [2021-11-12 23:32:04,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:32:04,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:32:04,316 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:32:04,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 23:32:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-12 23:32:04,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:32:04,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 23:32:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 48272 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 48044 trivial. 0 not checked. [2021-11-12 23:32:06,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 48272 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 48044 trivial. 0 not checked. [2021-11-12 23:32:11,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792510522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:11,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643143766] [2021-11-12 23:32:11,822 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-12 23:32:11,823 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:32:11,823 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) [2021-11-12 23:32:11,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:32:11,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2021-11-12 23:32:11,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774752968] [2021-11-12 23:32:11,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:32:11,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 23:32:11,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:32:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 23:32:11,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:32:11,830 INFO L87 Difference]: Start difference. First operand 4904 states and 32647 transitions. Second operand has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 1 states have call successors, (5), 1 states have call predecessors, (5), 20 states have return successors, (22), 20 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-12 23:32:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:12,336 INFO L93 Difference]: Finished difference Result 5337 states and 33145 transitions. [2021-11-12 23:32:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-12 23:32:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 1 states have call successors, (5), 1 states have call predecessors, (5), 20 states have return successors, (22), 20 states have call predecessors, (22), 1 states have call successors, (22) Word has length 1143 [2021-11-12 23:32:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:12,701 INFO L225 Difference]: With dead ends: 5337 [2021-11-12 23:32:12,702 INFO L226 Difference]: Without dead ends: 4772 [2021-11-12 23:32:12,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2303 GetRequests, 2257 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:32:12,725 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.85ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:12,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 255 Invalid, 159 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [12 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 115.85ms Time] [2021-11-12 23:32:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-11-12 23:32:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 4676. [2021-11-12 23:32:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 3353 states have (on average 1.029824038174769) internal successors, (3453), 3258 states have internal predecessors, (3453), 756 states have call successors, (756), 376 states have call predecessors, (756), 565 states have return successors, (27985), 1041 states have call predecessors, (27985), 709 states have call successors, (27985) [2021-11-12 23:32:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 32194 transitions. [2021-11-12 23:32:14,022 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 32194 transitions. Word has length 1143 [2021-11-12 23:32:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:14,027 INFO L470 AbstractCegarLoop]: Abstraction has 4676 states and 32194 transitions. [2021-11-12 23:32:14,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 1 states have call successors, (5), 1 states have call predecessors, (5), 20 states have return successors, (22), 20 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-12 23:32:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 32194 transitions. [2021-11-12 23:32:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-12 23:32:14,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:14,487 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 1, 1, 1, 1] [2021-11-12 23:32:14,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:14,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-12 23:32:14,711 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:32:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1801483335, now seen corresponding path program 6 times [2021-11-12 23:32:14,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:32:14,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4736569] [2021-11-12 23:32:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:14,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:32:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 30879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:25,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:32:25,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4736569] [2021-11-12 23:32:25,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4736569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:32:25,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687110277] [2021-11-12 23:32:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:32:25,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:32:25,378 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:32:25,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:32:25,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:32:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:32:25,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2789 conjuncts, 381 conjunts are in the unsatisfiable core [2021-11-12 23:32:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 30879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 30879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:51,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687110277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:51,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658614730] [2021-11-12 23:32:51,899 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-12 23:32:51,899 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:32:51,899 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) [2021-11-12 23:32:51,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:32:51,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2021-11-12 23:32:51,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299524769] [2021-11-12 23:32:51,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:32:51,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-12 23:32:51,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:32:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-12 23:32:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37055, Invalid=110017, Unknown=0, NotChecked=0, Total=147072 [2021-11-12 23:32:51,938 INFO L87 Difference]: Start difference. First operand 4676 states and 32194 transitions. Second operand has 384 states, 383 states have (on average 2.9817232375979112) internal successors, (1142), 384 states have internal predecessors, (1142), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:35:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:51,078 INFO L93 Difference]: Finished difference Result 17575 states and 176548 transitions. [2021-11-12 23:35:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-12 23:35:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 2.9817232375979112) internal successors, (1142), 384 states have internal predecessors, (1142), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 664 [2021-11-12 23:35:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:53,147 INFO L225 Difference]: With dead ends: 17575 [2021-11-12 23:35:53,147 INFO L226 Difference]: Without dead ends: 17574 [2021-11-12 23:35:53,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1802 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72952 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=91682, Invalid=237220, Unknown=0, NotChecked=0, Total=328902 [2021-11-12 23:35:53,326 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 24401 mSDsluCounter, 9632 mSDsCounter, 0 mSdLazyCounter, 30364 mSolverCounterSat, 56228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35139.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24401 SdHoareTripleChecker+Valid, 10514 SdHoareTripleChecker+Invalid, 86592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 639.48ms SdHoareTripleChecker+Time, 56228 IncrementalHoareTripleChecker+Valid, 30364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42747.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:53,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24401 Valid, 10514 Invalid, 86592 Unknown, 0 Unchecked, 639.48ms Time], IncrementalHoareTripleChecker [56228 Valid, 30364 Invalid, 0 Unknown, 0 Unchecked, 42747.31ms Time] [2021-11-12 23:35:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17574 states. [2021-11-12 23:35:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17574 to 9764. [2021-11-12 23:35:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 6905 states have (on average 1.028385228095583) internal successors, (7101), 6714 states have internal predecessors, (7101), 1620 states have call successors, (1620), 760 states have call predecessors, (1620), 1237 states have return successors, (159505), 2289 states have call predecessors, (159505), 1525 states have call successors, (159505) [2021-11-12 23:36:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 168226 transitions. [2021-11-12 23:36:00,796 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 168226 transitions. Word has length 664 [2021-11-12 23:36:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:00,797 INFO L470 AbstractCegarLoop]: Abstraction has 9764 states and 168226 transitions. [2021-11-12 23:36:00,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 2.9817232375979112) internal successors, (1142), 384 states have internal predecessors, (1142), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:36:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 168226 transitions. [2021-11-12 23:36:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2268 [2021-11-12 23:36:02,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:02,881 INFO L514 BasicCegarLoop]: trace histogram [255, 255, 128, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 20, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:36:02,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:03,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-12 23:36:03,082 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:36:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1843623318, now seen corresponding path program 6 times [2021-11-12 23:36:03,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:03,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83560190] [2021-11-12 23:36:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:03,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:36:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 195584 backedges. 0 proven. 1143 refuted. 0 times theorem prover too weak. 194441 trivial. 0 not checked. [2021-11-12 23:36:04,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:36:04,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83560190] [2021-11-12 23:36:04,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83560190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:04,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215166367] [2021-11-12 23:36:04,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:36:04,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:04,730 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:36:04,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 23:36:05,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:36:05,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:36:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 6449 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-12 23:36:05,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 195584 backedges. 2372 proven. 11630 refuted. 0 times theorem prover too weak. 181582 trivial. 0 not checked. [2021-11-12 23:36:09,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 195584 backedges. 2372 proven. 12393 refuted. 0 times theorem prover too weak. 180819 trivial. 0 not checked. [2021-11-12 23:36:36,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215166367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:36,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447798603] [2021-11-12 23:36:36,655 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-12 23:36:36,655 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 23:36:36,656 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) [2021-11-12 23:36:36,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:36:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 34, 59] total 103 [2021-11-12 23:36:36,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207684344] [2021-11-12 23:36:36,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 23:36:36,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-12 23:36:36,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:36:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-12 23:36:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=9485, Unknown=0, NotChecked=0, Total=10506 [2021-11-12 23:36:36,666 INFO L87 Difference]: Start difference. First operand 9764 states and 168226 transitions. Second operand has 103 states, 101 states have (on average 3.98019801980198) internal successors, (402), 99 states have internal predecessors, (402), 40 states have call successors, (44), 3 states have call predecessors, (44), 48 states have return successors, (84), 49 states have call predecessors, (84), 38 states have call successors, (84) [2021-11-12 23:36:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:44,870 INFO L93 Difference]: Finished difference Result 11867 states and 194497 transitions. [2021-11-12 23:36:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-12 23:36:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 101 states have (on average 3.98019801980198) internal successors, (402), 99 states have internal predecessors, (402), 40 states have call successors, (44), 3 states have call predecessors, (44), 48 states have return successors, (84), 49 states have call predecessors, (84), 38 states have call successors, (84) Word has length 2267 [2021-11-12 23:36:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:48,088 INFO L225 Difference]: With dead ends: 11867 [2021-11-12 23:36:48,088 INFO L226 Difference]: Without dead ends: 11362 [2021-11-12 23:36:48,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4671 GetRequests, 4470 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9880 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5293, Invalid=35713, Unknown=0, NotChecked=0, Total=41006 [2021-11-12 23:36:48,151 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2055 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 4511 mSolverCounterSat, 952 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1668.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 5463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.41ms SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 4511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2019.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:48,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 745 Invalid, 5463 Unknown, 0 Unchecked, 14.41ms Time], IncrementalHoareTripleChecker [952 Valid, 4511 Invalid, 0 Unknown, 0 Unchecked, 2019.43ms Time] [2021-11-12 23:36:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-11-12 23:36:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 10274. [2021-11-12 23:36:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10274 states, 7225 states have (on average 1.027128027681661) internal successors, (7421), 7034 states have internal predecessors, (7421), 1745 states have call successors, (1745), 760 states have call predecessors, (1745), 1302 states have return successors, (181708), 2479 states have call predecessors, (181708), 1650 states have call successors, (181708) [2021-11-12 23:36:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10274 states to 10274 states and 190874 transitions. [2021-11-12 23:36:55,464 INFO L78 Accepts]: Start accepts. Automaton has 10274 states and 190874 transitions. Word has length 2267 [2021-11-12 23:36:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:55,466 INFO L470 AbstractCegarLoop]: Abstraction has 10274 states and 190874 transitions. [2021-11-12 23:36:55,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 101 states have (on average 3.98019801980198) internal successors, (402), 99 states have internal predecessors, (402), 40 states have call successors, (44), 3 states have call predecessors, (44), 48 states have return successors, (84), 49 states have call predecessors, (84), 38 states have call successors, (84) [2021-11-12 23:36:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10274 states and 190874 transitions. [2021-11-12 23:36:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1337 [2021-11-12 23:36:59,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:59,277 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 190, 190, 190, 190, 190, 1, 1, 1, 1] [2021-11-12 23:36:59,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-12 23:36:59,479 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-12 23:36:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash -136443321, now seen corresponding path program 7 times [2021-11-12 23:36:59,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:36:59,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214007445] [2021-11-12 23:36:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:59,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:37:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 126255 backedges. 0 proven. 126255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:37:38,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:37:38,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214007445] [2021-11-12 23:37:38,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214007445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:37:38,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880757696] [2021-11-12 23:37:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 23:37:38,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:37:38,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:37:38,846 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9162dafc-f925-4477-aa68-d8ac9a015ab9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)