./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS --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 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:13:23,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:13:23,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:13:23,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:13:23,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:13:23,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:13:23,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:13:23,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:13:23,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:13:23,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:13:23,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:13:23,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:13:23,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:13:23,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:13:23,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:13:23,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:13:23,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:13:23,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:13:23,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:13:23,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:13:23,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:13:23,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:13:23,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:13:23,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:13:23,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:13:23,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:13:23,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:13:23,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:13:23,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:13:23,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:13:23,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:13:23,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:13:23,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:13:23,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:13:23,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:13:23,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:13:23,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:13:23,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:13:23,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:13:23,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:13:23,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:13:23,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-19 07:13:23,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:13:23,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:13:23,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:13:23,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:13:23,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:13:23,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:13:23,469 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:13:23,469 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:13:23,470 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:13:23,470 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:13:23,471 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:13:23,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:13:23,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:13:23,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:13:23,472 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:13:23,472 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:13:23,472 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:13:23,473 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:13:23,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:13:23,474 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:13:23,474 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:13:23,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:13:23,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:13:23,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:13:23,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:13:23,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:13:23,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:13:23,477 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-19 07:13:23,477 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:13:23,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:13:23,478 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:13:23,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:13:23,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:13:23,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:13:23,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:23,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:13:23,479 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:13:23,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:13:23,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:13:23,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:13:23,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:13:23,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:13:23,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:13:23,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97832baecac12bd55b66fbc3c6c38a25db85e9dc70cfa8f34b5e7a9e59086f06 [2022-11-19 07:13:23,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:13:23,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:13:23,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:13:23,806 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:13:23,807 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:13:23,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2022-11-19 07:13:23,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/data/e2d582557/c905f755e279419fa1c55441bb9e27a6/FLAG53f66212d [2022-11-19 07:13:24,395 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:13:24,400 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2022-11-19 07:13:24,413 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/data/e2d582557/c905f755e279419fa1c55441bb9e27a6/FLAG53f66212d [2022-11-19 07:13:24,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/data/e2d582557/c905f755e279419fa1c55441bb9e27a6 [2022-11-19 07:13:24,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:13:24,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:13:24,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:24,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:13:24,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:13:24,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:13:24" (1/1) ... [2022-11-19 07:13:24,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cadb9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:24, skipping insertion in model container [2022-11-19 07:13:24,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:13:24" (1/1) ... [2022-11-19 07:13:24,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:13:24,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:13:25,045 WARN L234 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_243f4226-9e40-46f1-aebd-4a824b84478c/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[3996,4009] [2022-11-19 07:13:25,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:25,067 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:13:25,108 WARN L234 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_243f4226-9e40-46f1-aebd-4a824b84478c/sv-benchmarks/c/weaver/chl-node-subst.wvr.c[3996,4009] [2022-11-19 07:13:25,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:25,130 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:13:25,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25 WrapperNode [2022-11-19 07:13:25,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:25,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:25,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:13:25,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:13:25,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,212 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 479 [2022-11-19 07:13:25,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:25,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:13:25,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:13:25,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:13:25,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:13:25,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:13:25,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:13:25,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:13:25,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (1/1) ... [2022-11-19 07:13:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:25,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:25,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:13:25,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:13:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:13:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:13:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:13:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:13:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:13:25,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:13:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:13:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:13:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:13:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:13:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:13:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:13:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:13:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:13:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:13:25,346 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:13:25,480 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:13:25,482 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:13:26,592 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:13:26,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:13:26,617 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:13:26,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:26 BoogieIcfgContainer [2022-11-19 07:13:26,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:13:26,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:13:26,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:13:26,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:13:26,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:13:24" (1/3) ... [2022-11-19 07:13:26,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10de0c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:26, skipping insertion in model container [2022-11-19 07:13:26,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:25" (2/3) ... [2022-11-19 07:13:26,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10de0c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:26, skipping insertion in model container [2022-11-19 07:13:26,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:26" (3/3) ... [2022-11-19 07:13:26,631 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2022-11-19 07:13:26,642 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 07:13:26,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:13:26,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-19 07:13:26,655 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:13:26,863 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 07:13:26,931 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:13:26,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 620 places, 657 transitions, 1338 flow [2022-11-19 07:13:26,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 620 places, 657 transitions, 1338 flow [2022-11-19 07:13:26,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 620 places, 657 transitions, 1338 flow [2022-11-19 07:13:27,319 INFO L130 PetriNetUnfolder]: 47/654 cut-off events. [2022-11-19 07:13:27,320 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 07:13:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 654 events. 47/654 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1082 event pairs, 0 based on Foata normal form. 0/565 useless extension candidates. Maximal degree in co-relation 551. Up to 2 conditions per place. [2022-11-19 07:13:27,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 40128 [2022-11-19 07:14:06,447 INFO L134 LiptonReduction]: Checked pairs total: 49753 [2022-11-19 07:14:06,447 INFO L136 LiptonReduction]: Total number of compositions: 835 [2022-11-19 07:14:06,455 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 87 transitions, 198 flow [2022-11-19 07:14:06,673 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3318 states, 2952 states have (on average 3.835027100271003) internal successors, (11321), 3317 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:06,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:14:06,698 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c2b738a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:14:06,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2022-11-19 07:14:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 3318 states, 2952 states have (on average 3.835027100271003) internal successors, (11321), 3317 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-19 07:14:06,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:06,715 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-19 07:14:06,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2613, now seen corresponding path program 1 times [2022-11-19 07:14:06,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:06,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567435595] [2022-11-19 07:14:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:06,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:06,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567435595] [2022-11-19 07:14:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567435595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:06,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:06,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-19 07:14:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881710073] [2022-11-19 07:14:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:06,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:14:06,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:14:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:14:06,874 INFO L87 Difference]: Start difference. First operand has 3318 states, 2952 states have (on average 3.835027100271003) internal successors, (11321), 3317 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:07,066 INFO L93 Difference]: Finished difference Result 1884 states and 6341 transitions. [2022-11-19 07:14:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:14:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1 [2022-11-19 07:14:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:07,102 INFO L225 Difference]: With dead ends: 1884 [2022-11-19 07:14:07,102 INFO L226 Difference]: Without dead ends: 1884 [2022-11-19 07:14:07,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:14:07,106 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:07,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-11-19 07:14:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1884. [2022-11-19 07:14:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1738 states have (on average 3.648446490218642) internal successors, (6341), 1883 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6341 transitions. [2022-11-19 07:14:07,252 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6341 transitions. Word has length 1 [2022-11-19 07:14:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:07,253 INFO L495 AbstractCegarLoop]: Abstraction has 1884 states and 6341 transitions. [2022-11-19 07:14:07,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6341 transitions. [2022-11-19 07:14:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:14:07,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:07,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:14:07,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:14:07,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash 83514, now seen corresponding path program 1 times [2022-11-19 07:14:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:07,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989481886] [2022-11-19 07:14:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:07,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:07,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:07,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989481886] [2022-11-19 07:14:07,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989481886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:07,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:07,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911806646] [2022-11-19 07:14:07,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:07,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:07,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:07,474 INFO L87 Difference]: Start difference. First operand 1884 states and 6341 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:07,647 INFO L93 Difference]: Finished difference Result 1882 states and 6339 transitions. [2022-11-19 07:14:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:14:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:07,664 INFO L225 Difference]: With dead ends: 1882 [2022-11-19 07:14:07,664 INFO L226 Difference]: Without dead ends: 1882 [2022-11-19 07:14:07,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:07,666 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:07,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-11-19 07:14:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1882. [2022-11-19 07:14:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1738 states have (on average 3.6472957422324512) internal successors, (6339), 1881 states have internal predecessors, (6339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6339 transitions. [2022-11-19 07:14:07,748 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6339 transitions. Word has length 2 [2022-11-19 07:14:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:07,749 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 6339 transitions. [2022-11-19 07:14:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6339 transitions. [2022-11-19 07:14:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:14:07,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:07,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:14:07,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:14:07,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 83516, now seen corresponding path program 1 times [2022-11-19 07:14:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:07,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037382704] [2022-11-19 07:14:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:07,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:07,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037382704] [2022-11-19 07:14:07,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037382704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:07,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:07,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034389063] [2022-11-19 07:14:07,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:07,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:07,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:07,889 INFO L87 Difference]: Start difference. First operand 1882 states and 6339 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:08,033 INFO L93 Difference]: Finished difference Result 1880 states and 6337 transitions. [2022-11-19 07:14:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:14:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:08,048 INFO L225 Difference]: With dead ends: 1880 [2022-11-19 07:14:08,049 INFO L226 Difference]: Without dead ends: 1880 [2022-11-19 07:14:08,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:08,050 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:08,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-11-19 07:14:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1880. [2022-11-19 07:14:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1738 states have (on average 3.64614499424626) internal successors, (6337), 1879 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 6337 transitions. [2022-11-19 07:14:08,124 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 6337 transitions. Word has length 2 [2022-11-19 07:14:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 1880 states and 6337 transitions. [2022-11-19 07:14:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 6337 transitions. [2022-11-19 07:14:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:14:08,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:08,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:14:08,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:14:08,126 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 83415, now seen corresponding path program 1 times [2022-11-19 07:14:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:08,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642720052] [2022-11-19 07:14:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:08,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642720052] [2022-11-19 07:14:08,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642720052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:08,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:08,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204236526] [2022-11-19 07:14:08,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:08,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:08,285 INFO L87 Difference]: Start difference. First operand 1880 states and 6337 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:08,585 INFO L93 Difference]: Finished difference Result 3753 states and 12667 transitions. [2022-11-19 07:14:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:08,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:14:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:08,614 INFO L225 Difference]: With dead ends: 3753 [2022-11-19 07:14:08,614 INFO L226 Difference]: Without dead ends: 3753 [2022-11-19 07:14:08,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:08,620 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:08,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:14:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-11-19 07:14:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 1883. [2022-11-19 07:14:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1741 states have (on average 3.6456059735784034) internal successors, (6347), 1882 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 6347 transitions. [2022-11-19 07:14:08,802 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 6347 transitions. Word has length 2 [2022-11-19 07:14:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:08,802 INFO L495 AbstractCegarLoop]: Abstraction has 1883 states and 6347 transitions. [2022-11-19 07:14:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 6347 transitions. [2022-11-19 07:14:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:14:08,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:08,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:14:08,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:14:08,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2591563, now seen corresponding path program 1 times [2022-11-19 07:14:08,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:08,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393709284] [2022-11-19 07:14:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:08,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:08,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393709284] [2022-11-19 07:14:08,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393709284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:08,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245673315] [2022-11-19 07:14:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:08,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:08,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:08,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:08,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:14:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:14:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:09,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:09,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245673315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:09,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:14:09,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-11-19 07:14:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736031442] [2022-11-19 07:14:09,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:09,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:09,098 INFO L87 Difference]: Start difference. First operand 1883 states and 6347 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:09,437 INFO L93 Difference]: Finished difference Result 3750 states and 12664 transitions. [2022-11-19 07:14:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:14:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:09,476 INFO L225 Difference]: With dead ends: 3750 [2022-11-19 07:14:09,491 INFO L226 Difference]: Without dead ends: 3750 [2022-11-19 07:14:09,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:09,492 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:09,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:14:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-11-19 07:14:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 1880. [2022-11-19 07:14:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1741 states have (on average 3.643882825962091) internal successors, (6344), 1879 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 6344 transitions. [2022-11-19 07:14:09,619 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 6344 transitions. Word has length 3 [2022-11-19 07:14:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:09,619 INFO L495 AbstractCegarLoop]: Abstraction has 1880 states and 6344 transitions. [2022-11-19 07:14:09,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 6344 transitions. [2022-11-19 07:14:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:14:09,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:09,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:14:09,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:09,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:09,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2591564, now seen corresponding path program 1 times [2022-11-19 07:14:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:09,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488068424] [2022-11-19 07:14:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:09,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:09,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488068424] [2022-11-19 07:14:09,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488068424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:09,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433486485] [2022-11-19 07:14:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:09,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:09,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:09,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:10,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:14:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:14:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:10,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:10,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433486485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966898659] [2022-11-19 07:14:10,148 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-19 07:14:10,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:10,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-19 07:14:10,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049831854] [2022-11-19 07:14:10,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:10,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:14:10,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:14:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:14:10,160 INFO L87 Difference]: Start difference. First operand 1880 states and 6344 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:10,901 INFO L93 Difference]: Finished difference Result 9369 states and 31654 transitions. [2022-11-19 07:14:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:14:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:14:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:10,979 INFO L225 Difference]: With dead ends: 9369 [2022-11-19 07:14:10,979 INFO L226 Difference]: Without dead ends: 9369 [2022-11-19 07:14:10,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:14:10,981 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 406 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:10,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 0 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:14:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2022-11-19 07:14:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 1889. [2022-11-19 07:14:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1750 states have (on average 3.6422857142857143) internal successors, (6374), 1888 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6374 transitions. [2022-11-19 07:14:11,210 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6374 transitions. Word has length 3 [2022-11-19 07:14:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:11,211 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 6374 transitions. [2022-11-19 07:14:11,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6374 transitions. [2022-11-19 07:14:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:14:11,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:11,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:14:11,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:11,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:14:11,419 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2594556, now seen corresponding path program 1 times [2022-11-19 07:14:11,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:11,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291604785] [2022-11-19 07:14:11,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:11,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:11,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:11,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291604785] [2022-11-19 07:14:11,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291604785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:11,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:11,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692538881] [2022-11-19 07:14:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:11,487 INFO L87 Difference]: Start difference. First operand 1889 states and 6374 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:11,614 INFO L93 Difference]: Finished difference Result 1887 states and 6368 transitions. [2022-11-19 07:14:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:14:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:11,624 INFO L225 Difference]: With dead ends: 1887 [2022-11-19 07:14:11,625 INFO L226 Difference]: Without dead ends: 1887 [2022-11-19 07:14:11,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:11,626 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:11,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2022-11-19 07:14:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1887. [2022-11-19 07:14:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1750 states have (on average 3.638857142857143) internal successors, (6368), 1886 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 6368 transitions. [2022-11-19 07:14:11,692 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 6368 transitions. Word has length 3 [2022-11-19 07:14:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:11,693 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 6368 transitions. [2022-11-19 07:14:11,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 6368 transitions. [2022-11-19 07:14:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:14:11,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:11,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:14:11,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:14:11,694 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:11,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2594676, now seen corresponding path program 1 times [2022-11-19 07:14:11,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:11,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766181649] [2022-11-19 07:14:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:11,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:11,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:11,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766181649] [2022-11-19 07:14:11,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766181649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:11,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:11,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:11,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39730601] [2022-11-19 07:14:11,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:11,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:11,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:11,765 INFO L87 Difference]: Start difference. First operand 1887 states and 6368 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:11,884 INFO L93 Difference]: Finished difference Result 1885 states and 6362 transitions. [2022-11-19 07:14:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:14:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:11,894 INFO L225 Difference]: With dead ends: 1885 [2022-11-19 07:14:11,894 INFO L226 Difference]: Without dead ends: 1885 [2022-11-19 07:14:11,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:11,895 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:11,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-11-19 07:14:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1885. [2022-11-19 07:14:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1750 states have (on average 3.6354285714285712) internal successors, (6362), 1884 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6362 transitions. [2022-11-19 07:14:11,980 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6362 transitions. Word has length 3 [2022-11-19 07:14:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:11,980 INFO L495 AbstractCegarLoop]: Abstraction has 1885 states and 6362 transitions. [2022-11-19 07:14:11,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6362 transitions. [2022-11-19 07:14:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:14:11,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:11,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:14:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:14:11,981 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 80440989, now seen corresponding path program 1 times [2022-11-19 07:14:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160708765] [2022-11-19 07:14:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:12,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:12,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160708765] [2022-11-19 07:14:12,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160708765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:12,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:12,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:12,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896396412] [2022-11-19 07:14:12,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:12,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:12,061 INFO L87 Difference]: Start difference. First operand 1885 states and 6362 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:12,172 INFO L93 Difference]: Finished difference Result 1884 states and 6357 transitions. [2022-11-19 07:14:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:14:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:12,182 INFO L225 Difference]: With dead ends: 1884 [2022-11-19 07:14:12,182 INFO L226 Difference]: Without dead ends: 1884 [2022-11-19 07:14:12,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:12,184 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:12,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-11-19 07:14:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1884. [2022-11-19 07:14:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1750 states have (on average 3.6325714285714286) internal successors, (6357), 1883 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6357 transitions. [2022-11-19 07:14:12,243 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6357 transitions. Word has length 4 [2022-11-19 07:14:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:12,244 INFO L495 AbstractCegarLoop]: Abstraction has 1884 states and 6357 transitions. [2022-11-19 07:14:12,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6357 transitions. [2022-11-19 07:14:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:14:12,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:12,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:14:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:14:12,245 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash 80440990, now seen corresponding path program 1 times [2022-11-19 07:14:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128721898] [2022-11-19 07:14:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:12,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128721898] [2022-11-19 07:14:12,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128721898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:12,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:12,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:14:12,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516494212] [2022-11-19 07:14:12,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:12,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:12,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:12,309 INFO L87 Difference]: Start difference. First operand 1884 states and 6357 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:12,419 INFO L93 Difference]: Finished difference Result 1883 states and 6352 transitions. [2022-11-19 07:14:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:14:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:12,429 INFO L225 Difference]: With dead ends: 1883 [2022-11-19 07:14:12,429 INFO L226 Difference]: Without dead ends: 1883 [2022-11-19 07:14:12,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:12,430 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:12,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-11-19 07:14:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1883. [2022-11-19 07:14:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1750 states have (on average 3.629714285714286) internal successors, (6352), 1882 states have internal predecessors, (6352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 6352 transitions. [2022-11-19 07:14:12,487 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 6352 transitions. Word has length 4 [2022-11-19 07:14:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:12,487 INFO L495 AbstractCegarLoop]: Abstraction has 1883 states and 6352 transitions. [2022-11-19 07:14:12,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 6352 transitions. [2022-11-19 07:14:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:14:12,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:12,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:14:12,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:14:12,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1801291000, now seen corresponding path program 1 times [2022-11-19 07:14:12,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:12,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613250196] [2022-11-19 07:14:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:12,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613250196] [2022-11-19 07:14:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613250196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:12,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:12,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:14:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461596022] [2022-11-19 07:14:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:12,578 INFO L87 Difference]: Start difference. First operand 1883 states and 6352 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:12,775 INFO L93 Difference]: Finished difference Result 3741 states and 12664 transitions. [2022-11-19 07:14:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:14:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:12,794 INFO L225 Difference]: With dead ends: 3741 [2022-11-19 07:14:12,794 INFO L226 Difference]: Without dead ends: 3741 [2022-11-19 07:14:12,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:12,795 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:12,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:14:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-11-19 07:14:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 1886. [2022-11-19 07:14:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1753 states have (on average 3.626925270964062) internal successors, (6358), 1885 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6358 transitions. [2022-11-19 07:14:12,871 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6358 transitions. Word has length 5 [2022-11-19 07:14:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:12,872 INFO L495 AbstractCegarLoop]: Abstraction has 1886 states and 6358 transitions. [2022-11-19 07:14:12,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6358 transitions. [2022-11-19 07:14:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:14:12,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:12,873 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:14:12,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:14:12,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash -98499880, now seen corresponding path program 2 times [2022-11-19 07:14:12,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241502966] [2022-11-19 07:14:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:12,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:12,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241502966] [2022-11-19 07:14:12,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241502966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:12,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019529483] [2022-11-19 07:14:12,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:14:12,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:12,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:12,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:14:13,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:14:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:14:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:14:13,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:13,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019529483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:13,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:14:13,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-11-19 07:14:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432795808] [2022-11-19 07:14:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:13,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:13,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:13,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:14:13,142 INFO L87 Difference]: Start difference. First operand 1886 states and 6358 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:13,247 INFO L93 Difference]: Finished difference Result 1883 states and 6355 transitions. [2022-11-19 07:14:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:14:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:13,256 INFO L225 Difference]: With dead ends: 1883 [2022-11-19 07:14:13,256 INFO L226 Difference]: Without dead ends: 1883 [2022-11-19 07:14:13,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:14:13,257 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:13,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-11-19 07:14:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1871. [2022-11-19 07:14:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1741 states have (on average 3.63641585295807) internal successors, (6331), 1870 states have internal predecessors, (6331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6331 transitions. [2022-11-19 07:14:13,349 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6331 transitions. Word has length 6 [2022-11-19 07:14:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:13,350 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 6331 transitions. [2022-11-19 07:14:13,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6331 transitions. [2022-11-19 07:14:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:14:13,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:13,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:14:13,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:13,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:13,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash -5442437, now seen corresponding path program 1 times [2022-11-19 07:14:13,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:13,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647114496] [2022-11-19 07:14:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:13,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:13,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647114496] [2022-11-19 07:14:13,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647114496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537657976] [2022-11-19 07:14:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:13,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:13,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:13,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:13,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:14:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:13,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:14:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:14:13,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:13,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537657976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:13,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:14:13,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-19 07:14:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414983783] [2022-11-19 07:14:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:13,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:13,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:13,823 INFO L87 Difference]: Start difference. First operand 1871 states and 6331 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:13,972 INFO L93 Difference]: Finished difference Result 1872 states and 6332 transitions. [2022-11-19 07:14:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:14:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:13,981 INFO L225 Difference]: With dead ends: 1872 [2022-11-19 07:14:13,981 INFO L226 Difference]: Without dead ends: 1872 [2022-11-19 07:14:13,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:13,982 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:13,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-11-19 07:14:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1872. [2022-11-19 07:14:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1742 states have (on average 3.634902411021814) internal successors, (6332), 1871 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6332 transitions. [2022-11-19 07:14:14,041 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6332 transitions. Word has length 6 [2022-11-19 07:14:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:14,041 INFO L495 AbstractCegarLoop]: Abstraction has 1872 states and 6332 transitions. [2022-11-19 07:14:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6332 transitions. [2022-11-19 07:14:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:14:14,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:14,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:14,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:14,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:14:14,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:14,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1334534127, now seen corresponding path program 1 times [2022-11-19 07:14:14,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:14,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743071639] [2022-11-19 07:14:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:14,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:14:14,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743071639] [2022-11-19 07:14:14,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743071639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346306045] [2022-11-19 07:14:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:14,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:14,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:14,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:14:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:14:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:14:14,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:14,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346306045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:14,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:14:14,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-19 07:14:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106535977] [2022-11-19 07:14:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:14,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:14,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:14:14,506 INFO L87 Difference]: Start difference. First operand 1872 states and 6332 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:14,645 INFO L93 Difference]: Finished difference Result 1873 states and 6333 transitions. [2022-11-19 07:14:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:14:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:14,685 INFO L225 Difference]: With dead ends: 1873 [2022-11-19 07:14:14,685 INFO L226 Difference]: Without dead ends: 1873 [2022-11-19 07:14:14,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:14:14,686 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:14,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-11-19 07:14:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1873. [2022-11-19 07:14:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1743 states have (on average 3.6333907056798624) internal successors, (6333), 1872 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6333 transitions. [2022-11-19 07:14:14,757 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6333 transitions. Word has length 7 [2022-11-19 07:14:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:14,757 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 6333 transitions. [2022-11-19 07:14:14,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6333 transitions. [2022-11-19 07:14:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:14:14,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:14,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:14,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:14,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:14:14,974 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:14,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:14,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1716633291, now seen corresponding path program 1 times [2022-11-19 07:14:14,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:14,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853720592] [2022-11-19 07:14:14,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:14,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:14:15,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:15,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853720592] [2022-11-19 07:14:15,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853720592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:15,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600141206] [2022-11-19 07:14:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:15,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:15,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:15,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:14:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:14:15,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:15,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:15,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600141206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:15,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:14:15,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-19 07:14:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020875313] [2022-11-19 07:14:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:14:15,284 INFO L87 Difference]: Start difference. First operand 1873 states and 6333 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:15,433 INFO L93 Difference]: Finished difference Result 1874 states and 6334 transitions. [2022-11-19 07:14:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:15,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:14:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:15,443 INFO L225 Difference]: With dead ends: 1874 [2022-11-19 07:14:15,443 INFO L226 Difference]: Without dead ends: 1874 [2022-11-19 07:14:15,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:14:15,446 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:15,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2022-11-19 07:14:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1874. [2022-11-19 07:14:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1744 states have (on average 3.631880733944954) internal successors, (6334), 1873 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 6334 transitions. [2022-11-19 07:14:15,503 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 6334 transitions. Word has length 8 [2022-11-19 07:14:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:15,503 INFO L495 AbstractCegarLoop]: Abstraction has 1874 states and 6334 transitions. [2022-11-19 07:14:15,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 6334 transitions. [2022-11-19 07:14:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:14:15,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:15,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:15,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:15,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:14:15,710 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1679632192, now seen corresponding path program 1 times [2022-11-19 07:14:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:15,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2265993] [2022-11-19 07:14:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:15,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:15,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2265993] [2022-11-19 07:14:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2265993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671842039] [2022-11-19 07:14:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:15,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:15,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:14:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:14:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:14:16,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:14:16,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671842039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:16,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136065981] [2022-11-19 07:14:16,123 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-19 07:14:16,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:14:16,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2022-11-19 07:14:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773099210] [2022-11-19 07:14:16,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:14:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:14:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:14:16,125 INFO L87 Difference]: Start difference. First operand 1874 states and 6334 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:16,883 INFO L93 Difference]: Finished difference Result 11169 states and 37902 transitions. [2022-11-19 07:14:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:14:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:14:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:16,936 INFO L225 Difference]: With dead ends: 11169 [2022-11-19 07:14:16,936 INFO L226 Difference]: Without dead ends: 11169 [2022-11-19 07:14:16,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:14:16,937 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 758 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:16,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 0 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:14:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11169 states. [2022-11-19 07:14:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11169 to 1884. [2022-11-19 07:14:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1754 states have (on average 3.622576966932725) internal successors, (6354), 1883 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6354 transitions. [2022-11-19 07:14:17,085 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6354 transitions. Word has length 9 [2022-11-19 07:14:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:17,085 INFO L495 AbstractCegarLoop]: Abstraction has 1884 states and 6354 transitions. [2022-11-19 07:14:17,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6354 transitions. [2022-11-19 07:14:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:14:17,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:17,087 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:17,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:14:17,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:17,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:17,294 INFO L85 PathProgramCache]: Analyzing trace with hash 136136909, now seen corresponding path program 1 times [2022-11-19 07:14:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:17,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719634074] [2022-11-19 07:14:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:17,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:14:17,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719634074] [2022-11-19 07:14:17,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719634074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:17,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:17,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:14:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029761307] [2022-11-19 07:14:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:17,357 INFO L87 Difference]: Start difference. First operand 1884 states and 6354 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:17,466 INFO L93 Difference]: Finished difference Result 1881 states and 6348 transitions. [2022-11-19 07:14:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:17,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:14:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:17,475 INFO L225 Difference]: With dead ends: 1881 [2022-11-19 07:14:17,476 INFO L226 Difference]: Without dead ends: 1881 [2022-11-19 07:14:17,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:17,477 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:17,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-11-19 07:14:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1881. [2022-11-19 07:14:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1754 states have (on average 3.6191562143671607) internal successors, (6348), 1880 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6348 transitions. [2022-11-19 07:14:17,532 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6348 transitions. Word has length 10 [2022-11-19 07:14:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:17,532 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 6348 transitions. [2022-11-19 07:14:17,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6348 transitions. [2022-11-19 07:14:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:14:17,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:17,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:14:17,533 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash -74719433, now seen corresponding path program 2 times [2022-11-19 07:14:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:17,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156586024] [2022-11-19 07:14:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:14:17,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156586024] [2022-11-19 07:14:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156586024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024240914] [2022-11-19 07:14:17,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:14:17,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:17,653 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:17,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:14:17,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:14:17,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:17,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:14:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:14:17,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:17,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024240914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:17,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:14:17,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 07:14:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483583055] [2022-11-19 07:14:17,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:17,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:14:17,840 INFO L87 Difference]: Start difference. First operand 1881 states and 6348 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:17,947 INFO L93 Difference]: Finished difference Result 1878 states and 6345 transitions. [2022-11-19 07:14:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:14:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:17,957 INFO L225 Difference]: With dead ends: 1878 [2022-11-19 07:14:17,957 INFO L226 Difference]: Without dead ends: 1878 [2022-11-19 07:14:17,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:14:17,958 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:17,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-19 07:14:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1872. [2022-11-19 07:14:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1748 states have (on average 3.6229977116704806) internal successors, (6333), 1871 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6333 transitions. [2022-11-19 07:14:18,012 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6333 transitions. Word has length 11 [2022-11-19 07:14:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:18,012 INFO L495 AbstractCegarLoop]: Abstraction has 1872 states and 6333 transitions. [2022-11-19 07:14:18,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6333 transitions. [2022-11-19 07:14:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:14:18,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:18,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:18,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:14:18,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:14:18,226 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -837783902, now seen corresponding path program 1 times [2022-11-19 07:14:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249927713] [2022-11-19 07:14:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:18,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:18,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:18,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249927713] [2022-11-19 07:14:18,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249927713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:18,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:18,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063497591] [2022-11-19 07:14:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:14:18,350 INFO L87 Difference]: Start difference. First operand 1872 states and 6333 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:18,483 INFO L93 Difference]: Finished difference Result 1873 states and 6333 transitions. [2022-11-19 07:14:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 07:14:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:18,493 INFO L225 Difference]: With dead ends: 1873 [2022-11-19 07:14:18,493 INFO L226 Difference]: Without dead ends: 1873 [2022-11-19 07:14:18,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:18,494 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:18,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-11-19 07:14:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1873. [2022-11-19 07:14:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1749 states have (on average 3.620926243567753) internal successors, (6333), 1872 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 6333 transitions. [2022-11-19 07:14:18,547 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 6333 transitions. Word has length 16 [2022-11-19 07:14:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:18,548 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 6333 transitions. [2022-11-19 07:14:18,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 6333 transitions. [2022-11-19 07:14:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:14:18,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:18,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:18,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:14:18,551 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1224794175, now seen corresponding path program 1 times [2022-11-19 07:14:18,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:18,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460802957] [2022-11-19 07:14:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:18,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:14:18,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:18,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460802957] [2022-11-19 07:14:18,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460802957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:18,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:18,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:18,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826925529] [2022-11-19 07:14:18,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:18,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:18,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:18,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:14:18,725 INFO L87 Difference]: Start difference. First operand 1873 states and 6333 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:18,869 INFO L93 Difference]: Finished difference Result 1874 states and 6334 transitions. [2022-11-19 07:14:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:18,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:14:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:18,878 INFO L225 Difference]: With dead ends: 1874 [2022-11-19 07:14:18,878 INFO L226 Difference]: Without dead ends: 1874 [2022-11-19 07:14:18,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:14:18,879 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:18,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2022-11-19 07:14:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1874. [2022-11-19 07:14:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1750 states have (on average 3.619428571428571) internal successors, (6334), 1873 states have internal predecessors, (6334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 6334 transitions. [2022-11-19 07:14:18,929 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 6334 transitions. Word has length 17 [2022-11-19 07:14:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:18,929 INFO L495 AbstractCegarLoop]: Abstraction has 1874 states and 6334 transitions. [2022-11-19 07:14:18,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 6334 transitions. [2022-11-19 07:14:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:14:18,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:18,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:18,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:14:18,931 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -342552779, now seen corresponding path program 1 times [2022-11-19 07:14:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:18,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132431783] [2022-11-19 07:14:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:14:19,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132431783] [2022-11-19 07:14:19,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132431783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:19,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:19,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:19,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477649483] [2022-11-19 07:14:19,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:19,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:19,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:19,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:19,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:14:19,050 INFO L87 Difference]: Start difference. First operand 1874 states and 6334 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:19,182 INFO L93 Difference]: Finished difference Result 1875 states and 6335 transitions. [2022-11-19 07:14:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:14:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:19,192 INFO L225 Difference]: With dead ends: 1875 [2022-11-19 07:14:19,192 INFO L226 Difference]: Without dead ends: 1875 [2022-11-19 07:14:19,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:19,193 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:19,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:14:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-11-19 07:14:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1875. [2022-11-19 07:14:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1751 states have (on average 3.6179326099371787) internal successors, (6335), 1874 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 6335 transitions. [2022-11-19 07:14:19,244 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 6335 transitions. Word has length 18 [2022-11-19 07:14:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:19,244 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 6335 transitions. [2022-11-19 07:14:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 6335 transitions. [2022-11-19 07:14:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:14:19,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:19,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:19,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:14:19,246 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 60 more)] === [2022-11-19 07:14:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:19,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1970619144, now seen corresponding path program 1 times [2022-11-19 07:14:19,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:19,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529308469] [2022-11-19 07:14:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:19,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:21,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:21,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529308469] [2022-11-19 07:14:21,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529308469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:21,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69854384] [2022-11-19 07:14:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:21,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:21,038 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:21,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_243f4226-9e40-46f1-aebd-4a824b84478c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:14:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 07:14:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:21,369 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-11-19 07:14:21,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 39 [2022-11-19 07:14:21,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:14:21,521 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:14:21,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:14:21,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:21,643 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:14:21,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:14:21,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:21,810 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:14:21,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 07:14:21,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:21,971 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 07:14:21,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 07:14:22,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:22,044 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-19 07:14:22,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:14:22,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:22,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:22,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:22,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:22,534 WARN L837 $PredicateComparison]: unable to prove that (forall ((~get_5~0.offset Int) (~id_3~0 Int) (~get_5~0.base Int) (v_ArrVal_764 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_764))) (let ((.cse0 (select (select .cse1 ~get_5~0.base) (+ (* ~id_3~0 4) ~get_5~0.offset)))) (or (not (<= 0 .cse0)) (not (<= .cse0 9223372039002259455)) (< (select (select .cse1 c_~get_2~0.base) (+ (* c_~id_0~0 4) c_~get_2~0.offset)) (+ .cse0 2147483648)))))) is different from false [2022-11-19 07:14:24,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:14:24,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 130 [2022-11-19 07:14:28,060 INFO L321 Elim1Store]: treesize reduction 4, result has 92.2 percent of original size [2022-11-19 07:14:28,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14613086189 treesize of output 14478344211