./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/gcd-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/gcd-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abac4834eb8b1123405a2c6108c3d30e84ad22df2224a055d262e226b4ba66e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:18:51,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:18:51,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:18:51,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:18:51,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:18:51,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:18:51,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:18:51,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:18:51,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:18:51,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:18:51,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:18:51,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:18:51,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:18:51,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:18:51,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:18:51,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:18:51,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:18:51,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:18:51,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:18:51,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:18:51,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:18:51,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:18:51,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:18:51,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:18:51,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:18:51,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:18:51,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:18:51,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:18:51,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:18:51,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:18:51,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:18:51,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:18:51,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:18:51,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:18:51,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:18:51,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:18:51,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:18:51,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:18:51,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:18:51,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:18:51,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:18:51,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:18:51,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:18:51,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:18:51,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:18:51,785 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:18:51,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:18:51,786 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:18:51,786 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:18:51,786 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:18:51,786 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:18:51,787 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:18:51,787 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:18:51,787 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:18:51,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:18:51,788 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:18:51,788 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:18:51,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:18:51,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:18:51,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:18:51,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:18:51,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:18:51,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:18:51,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:18:51,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:18:51,791 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:18:51,791 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:18:51,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:18:51,792 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:18:51,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:18:51,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:18:51,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:18:51,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:18:51,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:18:51,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:18:51,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:18:51,794 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:18:51,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:18:51,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:18:51,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:18:51,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:18:51,795 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abac4834eb8b1123405a2c6108c3d30e84ad22df2224a055d262e226b4ba66e1 [2021-11-07 01:18:52,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:18:52,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:18:52,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:18:52,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:18:52,086 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:18:52,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/pthread-atomic/gcd-2.i [2021-11-07 01:18:52,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/data/5c68dca77/2a7dce7de196479092992fed00982525/FLAGe2658ec57 [2021-11-07 01:18:52,694 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:18:52,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/sv-benchmarks/c/pthread-atomic/gcd-2.i [2021-11-07 01:18:52,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/data/5c68dca77/2a7dce7de196479092992fed00982525/FLAGe2658ec57 [2021-11-07 01:18:52,987 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/data/5c68dca77/2a7dce7de196479092992fed00982525 [2021-11-07 01:18:52,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:18:52,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:18:52,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:18:52,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:18:52,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:18:52,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:18:52" (1/1) ... [2021-11-07 01:18:52,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1631bc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:52, skipping insertion in model container [2021-11-07 01:18:52,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:18:52" (1/1) ... [2021-11-07 01:18:53,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:18:53,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:18:53,318 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] [2021-11-07 01:18:53,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:18:53,526 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:18:53,542 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/sv-benchmarks/c/pthread-atomic/gcd-2.i[938,951] [2021-11-07 01:18:53,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:18:53,658 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:18:53,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53 WrapperNode [2021-11-07 01:18:53,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:18:53,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:18:53,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:18:53,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:18:53,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:18:53,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:18:53,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:18:53,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:18:53,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:18:53,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:18:53,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:18:53,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:18:53,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (1/1) ... [2021-11-07 01:18:53,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:18:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:18:53,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:18:53,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:18:53,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 01:18:53,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 01:18:53,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:18:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:18:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure dec_a [2021-11-07 01:18:53,908 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_a [2021-11-07 01:18:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure dec_b [2021-11-07 01:18:53,908 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_b [2021-11-07 01:18:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:18:53,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:18:53,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:18:53,910 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 01:18:54,421 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:18:54,421 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-07 01:18:54,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:18:54 BoogieIcfgContainer [2021-11-07 01:18:54,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:18:54,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:18:54,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:18:54,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:18:54,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:18:52" (1/3) ... [2021-11-07 01:18:54,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa87735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:18:54, skipping insertion in model container [2021-11-07 01:18:54,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:53" (2/3) ... [2021-11-07 01:18:54,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa87735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:18:54, skipping insertion in model container [2021-11-07 01:18:54,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:18:54" (3/3) ... [2021-11-07 01:18:54,431 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd-2.i [2021-11-07 01:18:54,437 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:18:54,438 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:18:54,438 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-07 01:18:54,438 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:18:54,490 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,490 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,490 WARN L322 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,490 WARN L322 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,491 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,491 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,491 WARN L322 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,491 WARN L322 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,492 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,492 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,492 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,492 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,493 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,493 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,493 WARN L322 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,494 WARN L322 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,494 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,494 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,494 WARN L322 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,494 WARN L322 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,495 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,495 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,495 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,496 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,499 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,514 WARN L322 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,514 WARN L322 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,514 WARN L322 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,517 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,517 WARN L322 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,517 WARN L322 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,517 WARN L322 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:18:54,523 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-07 01:18:54,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:18:54,590 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:18:54,590 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:18:54,605 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:18:54,616 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 129 transitions, 274 flow [2021-11-07 01:18:54,619 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 129 transitions, 274 flow [2021-11-07 01:18:54,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 129 transitions, 274 flow [2021-11-07 01:18:54,778 INFO L129 PetriNetUnfolder]: 12/127 cut-off events. [2021-11-07 01:18:54,778 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-07 01:18:54,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 12/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2021-11-07 01:18:54,795 INFO L116 LiptonReduction]: Number of co-enabled transitions 308 [2021-11-07 01:19:15,621 WARN L207 SmtUtils]: Spent 7.25 s on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-11-07 01:19:23,127 INFO L131 LiptonReduction]: Checked pairs total: 750 [2021-11-07 01:19:23,127 INFO L133 LiptonReduction]: Total number of compositions: 149 [2021-11-07 01:19:23,143 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-11-07 01:19:23,159 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:19:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:19:23,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:23,172 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:23,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1994466237, now seen corresponding path program 1 times [2021-11-07 01:19:23,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:23,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472457707] [2021-11-07 01:19:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:23,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:23,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:19:23,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156833749] [2021-11-07 01:19:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:23,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:19:23,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:23,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:19:23,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:19:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 01:19:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:23,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:26,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:26,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472457707] [2021-11-07 01:19:26,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:19:26,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156833749] [2021-11-07 01:19:26,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156833749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:26,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:26,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 01:19:26,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575254244] [2021-11-07 01:19:26,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:26,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 01:19:26,627 INFO L87 Difference]: Start difference. First operand has 54 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 53 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:07,358 INFO L93 Difference]: Finished difference Result 130 states and 274 transitions. [2021-11-07 01:20:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:20:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 13 [2021-11-07 01:20:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:07,487 INFO L225 Difference]: With dead ends: 130 [2021-11-07 01:20:07,487 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 01:20:07,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:20:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 01:20:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 113. [2021-11-07 01:20:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 2.3) internal successors, (253), 112 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 253 transitions. [2021-11-07 01:20:07,534 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 253 transitions. Word has length 13 [2021-11-07 01:20:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:07,535 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 253 transitions. [2021-11-07 01:20:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 253 transitions. [2021-11-07 01:20:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:20:07,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:07,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:07,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:07,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-07 01:20:07,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1994466238, now seen corresponding path program 1 times [2021-11-07 01:20:07,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:07,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618052979] [2021-11-07 01:20:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:07,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:07,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:20:07,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745186896] [2021-11-07 01:20:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:07,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:07,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:07,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:20:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 01:20:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:08,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:10,766 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 Int)) (let ((.cse0 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72)))) (or (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72 4294967296)) 4294967296) 0)) (<= .cse0 1) (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_72_61_72) (<= 4294967296 .cse0)))) is different from false [2021-11-07 01:20:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:13,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:13,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618052979] [2021-11-07 01:20:13,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:20:13,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745186896] [2021-11-07 01:20:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745186896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:13,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:13,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 01:20:13,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725497060] [2021-11-07 01:20:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:13,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:13,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:13,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=12, Unknown=1, NotChecked=6, Total=30 [2021-11-07 01:20:13,664 INFO L87 Difference]: Start difference. First operand 113 states and 253 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:20:33,780 WARN L207 SmtUtils]: Spent 20.07 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-11-07 01:20:53,315 WARN L207 SmtUtils]: Spent 9.40 s on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-11-07 01:21:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:11,652 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2021-11-07 01:21:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:21:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 13 [2021-11-07 01:21:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:11,657 INFO L225 Difference]: With dead ends: 173 [2021-11-07 01:21:11,658 INFO L226 Difference]: Without dead ends: 173 [2021-11-07 01:21:11,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=30, Invalid=28, Unknown=2, NotChecked=12, Total=72 [2021-11-07 01:21:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-07 01:21:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2021-11-07 01:21:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 132 states have (on average 2.265151515151515) internal successors, (299), 134 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 299 transitions. [2021-11-07 01:21:11,677 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 299 transitions. Word has length 13 [2021-11-07 01:21:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:11,677 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 299 transitions. [2021-11-07 01:21:11,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 299 transitions. [2021-11-07 01:21:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:21:11,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:11,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:11,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:11,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:11,883 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1994466239, now seen corresponding path program 1 times [2021-11-07 01:21:11,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:21:11,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650062954] [2021-11-07 01:21:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:11,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:21:11,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:21:11,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322293719] [2021-11-07 01:21:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:11,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:21:11,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:21:11,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:21:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:21:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:12,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:12,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:21:12,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650062954] [2021-11-07 01:21:12,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:21:12,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322293719] [2021-11-07 01:21:12,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322293719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:12,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:12,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-07 01:21:12,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568014490] [2021-11-07 01:21:12,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:21:12,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:21:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:21:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:12,572 INFO L87 Difference]: Start difference. First operand 135 states and 299 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:13,831 INFO L93 Difference]: Finished difference Result 185 states and 396 transitions. [2021-11-07 01:21:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:21:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 13 [2021-11-07 01:21:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:13,834 INFO L225 Difference]: With dead ends: 185 [2021-11-07 01:21:13,835 INFO L226 Difference]: Without dead ends: 149 [2021-11-07 01:21:13,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:21:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-07 01:21:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-11-07 01:21:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 114 states have (on average 2.210526315789474) internal successors, (252), 116 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 252 transitions. [2021-11-07 01:21:13,850 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 252 transitions. Word has length 13 [2021-11-07 01:21:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 252 transitions. [2021-11-07 01:21:13,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 252 transitions. [2021-11-07 01:21:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:21:13,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:13,866 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:13,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:14,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:14,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 251279071, now seen corresponding path program 1 times [2021-11-07 01:21:14,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:21:14,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996450854] [2021-11-07 01:21:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:14,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:21:14,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:21:14,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699047632] [2021-11-07 01:21:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:14,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:14,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:21:14,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:21:14,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:21:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:14,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 01:21:14,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:21:14,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:21:14,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:21:14,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996450854] [2021-11-07 01:21:14,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:21:14,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699047632] [2021-11-07 01:21:14,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699047632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:14,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:21:14,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 01:21:14,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222022986] [2021-11-07 01:21:14,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:21:14,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:21:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:21:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:21:14,972 INFO L87 Difference]: Start difference. First operand 117 states and 252 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:17,342 INFO L93 Difference]: Finished difference Result 163 states and 344 transitions. [2021-11-07 01:21:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:21:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 15 [2021-11-07 01:21:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:17,346 INFO L225 Difference]: With dead ends: 163 [2021-11-07 01:21:17,346 INFO L226 Difference]: Without dead ends: 163 [2021-11-07 01:21:17,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:21:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-07 01:21:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 131. [2021-11-07 01:21:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 128 states have (on average 2.25) internal successors, (288), 130 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 288 transitions. [2021-11-07 01:21:17,360 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 288 transitions. Word has length 15 [2021-11-07 01:21:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:17,361 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 288 transitions. [2021-11-07 01:21:17,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:17,361 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 288 transitions. [2021-11-07 01:21:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:21:17,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:17,363 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:21:17,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 01:21:17,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:17,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:21:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash 251279073, now seen corresponding path program 1 times [2021-11-07 01:21:17,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:21:17,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042367466] [2021-11-07 01:21:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:17,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:21:17,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:21:17,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678905072] [2021-11-07 01:21:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:17,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:21:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:21:17,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:21:17,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:21:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:17,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 01:21:17,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:18,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:21:34,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:21:34,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042367466] [2021-11-07 01:21:34,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:21:34,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678905072] [2021-11-07 01:21:34,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678905072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:34,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318188326] [2021-11-07 01:21:34,784 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 01:21:34,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:34,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-07 01:21:34,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450860365] [2021-11-07 01:21:34,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:21:34,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:21:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:21:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=54, Unknown=5, NotChecked=0, Total=90 [2021-11-07 01:21:34,790 INFO L87 Difference]: Start difference. First operand 131 states and 288 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:21:57,437 WARN L207 SmtUtils]: Spent 16.14 s on a formula simplification that was a NOOP. DAG size: 40 [2021-11-07 01:22:39,829 WARN L207 SmtUtils]: Spent 36.80 s on a formula simplification. DAG size of input: 45 DAG size of output: 21 [2021-11-07 01:22:56,815 WARN L207 SmtUtils]: Spent 8.38 s on a formula simplification that was a NOOP. DAG size: 24 [2021-11-07 01:23:25,144 WARN L207 SmtUtils]: Spent 14.75 s on a formula simplification that was a NOOP. DAG size: 32 [2021-11-07 01:24:14,550 WARN L207 SmtUtils]: Spent 8.67 s on a formula simplification that was a NOOP. DAG size: 27 [2021-11-07 01:24:43,831 WARN L207 SmtUtils]: Spent 17.05 s on a formula simplification that was a NOOP. DAG size: 34 [2021-11-07 01:25:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:16,713 INFO L93 Difference]: Finished difference Result 320 states and 693 transitions. [2021-11-07 01:25:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:25:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 15 [2021-11-07 01:25:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:16,721 INFO L225 Difference]: With dead ends: 320 [2021-11-07 01:25:16,721 INFO L226 Difference]: Without dead ends: 259 [2021-11-07 01:25:16,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 142.6s TimeCoverageRelationStatistics Valid=95, Invalid=195, Unknown=16, NotChecked=0, Total=306 [2021-11-07 01:25:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-07 01:25:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 217. [2021-11-07 01:25:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 214 states have (on average 2.3317757009345796) internal successors, (499), 216 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 499 transitions. [2021-11-07 01:25:16,743 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 499 transitions. Word has length 15 [2021-11-07 01:25:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:16,744 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 499 transitions. [2021-11-07 01:25:16,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 499 transitions. [2021-11-07 01:25:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 01:25:16,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:16,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:16,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:16,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:16,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:25:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 628987161, now seen corresponding path program 1 times [2021-11-07 01:25:16,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:16,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130483963] [2021-11-07 01:25:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:16,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:16,998 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:16,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800834157] [2021-11-07 01:25:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:16,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:16,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:17,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:17,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 01:25:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 01:25:17,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:18,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:25:28,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:25:28,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130483963] [2021-11-07 01:25:28,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:25:28,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800834157] [2021-11-07 01:25:28,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800834157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:25:28,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703301227] [2021-11-07 01:25:28,959 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 01:25:28,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:25:28,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-11-07 01:25:28,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173432875] [2021-11-07 01:25:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:25:28,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:25:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:25:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:28,963 INFO L87 Difference]: Start difference. First operand 217 states and 499 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:48,010 INFO L93 Difference]: Finished difference Result 304 states and 664 transitions. [2021-11-07 01:25:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:25:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 15 [2021-11-07 01:25:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:48,016 INFO L225 Difference]: With dead ends: 304 [2021-11-07 01:25:48,016 INFO L226 Difference]: Without dead ends: 278 [2021-11-07 01:25:48,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:25:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-07 01:25:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 231. [2021-11-07 01:25:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 2.3157894736842106) internal successors, (528), 230 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 528 transitions. [2021-11-07 01:25:48,032 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 528 transitions. Word has length 15 [2021-11-07 01:25:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:48,033 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 528 transitions. [2021-11-07 01:25:48,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 528 transitions. [2021-11-07 01:25:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 01:25:48,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:48,037 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:48,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 01:25:48,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 01:25:48,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:25:48,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 463366076, now seen corresponding path program 1 times [2021-11-07 01:25:48,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:25:48,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246683868] [2021-11-07 01:25:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:48,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:25:48,309 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 01:25:48,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870312677] [2021-11-07 01:25:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:48,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:25:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:48,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:25:48,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90801dd4-895b-4823-b415-c2963d0ab444/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 01:26:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:02,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 01:26:03,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:26:09,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:12,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse1 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse0 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse0) 4294967296) 0)) (<= 4294967296 .cse1) (<= .cse1 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse0) 4294967296) 0))))) is different from false [2021-11-07 01:28:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-07 01:28:07,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:28:07,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246683868] [2021-11-07 01:28:07,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:28:07,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870312677] [2021-11-07 01:28:07,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870312677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:07,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931771040] [2021-11-07 01:28:07,750 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 01:28:07,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:07,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-07 01:28:07,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591578574] [2021-11-07 01:28:07,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:28:07,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:28:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:28:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=66, Unknown=17, NotChecked=18, Total=132 [2021-11-07 01:28:07,752 INFO L87 Difference]: Start difference. First operand 231 states and 528 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:32,558 WARN L207 SmtUtils]: Spent 24.52 s on a formula simplification that was a NOOP. DAG size: 107 [2021-11-07 01:30:07,260 WARN L207 SmtUtils]: Spent 27.53 s on a formula simplification. DAG size of input: 60 DAG size of output: 22 [2021-11-07 01:30:46,950 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~a~0 4294967294)) (.cse4 (mod c_~a~0 4294967296)) (.cse5 (mod c_~b~0 4294967296)) (.cse6 (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse11 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse10 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse10) 4294967296) 0)) (<= 4294967296 .cse11) (<= .cse11 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse10) 4294967296) 0))))))) (and (or (not (= (mod (+ .cse0 c_~b~0) 4294967296) 0)) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse2 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (let ((.cse1 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 4294967295)) 4294967296)) (.cse3 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse2 4294967296))) (or (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse1) 4294967296) 0)) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse2 1)) (<= (+ (* 2 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (* 4 (div (+ (- 1) (* c_~a~0 (- 1))) (- 4294967296)))) (+ 7 (div (+ c_~a~0 (* (mod c_~b~0 4294967296) (- 1))) 4294967296) (div (+ c_~a~0 (- 4294967296)) 4294967296) (* 2 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse1) 4294967296) 0)) (<= .cse3 c_~a~0) (<= .cse3 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102)))))) (or (and (not (= (mod (+ .cse4 (* c_~b~0 4294967295)) (- 4294967296)) 0)) (or (<= .cse5 .cse4) (not (= (mod (+ (* c_~a~0 4294967295) c_~b~0 (* .cse4 4294967295)) 4294967296) 0)))) .cse6) (or (not (= (mod (+ (* c_~b~0 3) .cse0) 4294967296) 0)) (<= .cse4 .cse5) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117))) (let ((.cse9 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse7 c_~b~0 4294967296)) (.cse8 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 4294967295) (* c_~b~0 4294967295)) 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse7 c_~b~0 1)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse8) 4294967296) 0)) (<= (+ (* 2 (div (+ (- 1) (* c_~a~0 (- 1)) c_~b~0) (- 4294967296))) aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (+ 3 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 (div (+ c_~a~0 (* c_~b~0 (- 1)) (* (mod c_~b~0 4294967296) (- 1))) 4294967296))) (<= .cse9 c_~a~0) (<= .cse9 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse8) 4294967296) 0))))))) .cse6)) is different from false [2021-11-07 01:31:12,949 WARN L207 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-11-07 01:31:23,270 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~b_in~0 4294967296)) (.cse1 (mod c_~a~0 4294967296)) (.cse2 (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse4 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse3 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse3) 4294967296) 0)) (<= 4294967296 .cse4) (<= .cse4 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse3) 4294967296) 0))))))) (and (or (= c_ULTIMATE.start_main_~a_in~0 c_~a~0) (and (= c_ULTIMATE.start_main_~a_in~0 (+ c_ULTIMATE.start_main_~b_in~0 c_~a~0)) (< .cse0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)))) (= (mod (+ c_~a~0 .cse1 (* c_ULTIMATE.start_main_~b_in~0 4294967295)) (- 4294967296)) 0) (< .cse1 .cse0) (or (and (not (= (mod (+ .cse1 (* c_~b~0 4294967295)) (- 4294967296)) 0)) (or (<= (mod c_~b~0 4294967296) .cse1) (not (= (mod (+ (* c_~a~0 4294967295) c_~b~0 (* .cse1 4294967295)) 4294967296) 0)))) .cse2) .cse2)) is different from false [2021-11-07 01:31:33,792 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)) (.cse7 (mod c_~a~0 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~b_in~0 4294967296))) (let ((.cse1 (* c_~a~0 4294967294)) (.cse9 (mod c_~b~0 4294967296)) (.cse13 (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse16 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse15 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse15) 4294967296) 0)) (<= 4294967296 .cse16) (<= .cse16 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse15) 4294967296) 0)))))) (.cse8 (< .cse7 .cse14)) (.cse5 (= c_ULTIMATE.start_main_~a_in~0 c_~a~0)) (.cse6 (and (= c_ULTIMATE.start_main_~a_in~0 (+ c_ULTIMATE.start_main_~b_in~0 c_~a~0)) (< .cse14 .cse0)))) (and (< 0 .cse0) (or (not (= (mod (+ .cse1 c_~b~0) 4294967296) 0)) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse3 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (let ((.cse2 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 4294967295)) 4294967296)) (.cse4 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse3 4294967296))) (or (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse2) 4294967296) 0)) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse3 1)) (<= (+ (* 2 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (* 4 (div (+ (- 1) (* c_~a~0 (- 1))) (- 4294967296)))) (+ 7 (div (+ c_~a~0 (* (mod c_~b~0 4294967296) (- 1))) 4294967296) (div (+ c_~a~0 (- 4294967296)) 4294967296) (* 2 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse2) 4294967296) 0)) (<= .cse4 c_~a~0) (<= .cse4 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102)))))) (or .cse5 .cse6) (= (mod (+ c_~a~0 .cse7 (* c_ULTIMATE.start_main_~b_in~0 4294967295)) (- 4294967296)) 0) .cse8 (or (not (= (mod (+ (* c_~b~0 3) .cse1) 4294967296) 0)) (<= .cse7 .cse9) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse10 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117))) (let ((.cse12 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse10 c_~b~0 4294967296)) (.cse11 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 4294967295) (* c_~b~0 4294967295)) 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse10 c_~b~0 1)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse11) 4294967296) 0)) (<= (+ (* 2 (div (+ (- 1) (* c_~a~0 (- 1)) c_~b~0) (- 4294967296))) aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (+ 3 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 (div (+ c_~a~0 (* c_~b~0 (- 1)) (* (mod c_~b~0 4294967296) (- 1))) 4294967296))) (<= .cse12 c_~a~0) (<= .cse12 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse11) 4294967296) 0))))))) (or (not (= .cse9 .cse7)) .cse13) (not (= .cse14 .cse7)) (or (<= .cse9 .cse7) (not (= (mod (+ (* c_~a~0 4294967295) c_~b~0 (* .cse7 4294967295)) 4294967296) 0)) .cse13) (or (and .cse8 (= (+ c_~b~0 c_~a~0) c_ULTIMATE.start_main_~b_in~0)) (and (= c_ULTIMATE.start_main_~b_in~0 c_~b~0) (<= .cse14 .cse7))) (or (and .cse5 (<= .cse0 .cse14)) .cse6)))) is different from false [2021-11-07 01:31:56,113 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~a~0 4294967294)) (.cse5 (mod c_~b~0 4294967296)) (.cse4 (mod c_~a~0 4294967296))) (and (or (not (= (mod (+ .cse0 c_~b~0) 4294967296) 0)) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse2 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (let ((.cse1 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 4294967295)) 4294967296)) (.cse3 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse2 4294967296))) (or (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse1) 4294967296) 0)) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse2 1)) (<= (+ (* 2 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (* 4 (div (+ (- 1) (* c_~a~0 (- 1))) (- 4294967296)))) (+ 7 (div (+ c_~a~0 (* (mod c_~b~0 4294967296) (- 1))) 4294967296) (div (+ c_~a~0 (- 4294967296)) 4294967296) (* 2 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse1) 4294967296) 0)) (<= .cse3 c_~a~0) (<= .cse3 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102)))))) (or (not (= (mod (+ (* c_~b~0 3) .cse0) 4294967296) 0)) (<= .cse4 .cse5) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse6 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117))) (let ((.cse8 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse6 c_~b~0 4294967296)) (.cse7 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 4294967295) (* c_~b~0 4294967295)) 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse6 c_~b~0 1)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse7) 4294967296) 0)) (<= (+ (* 2 (div (+ (- 1) (* c_~a~0 (- 1)) c_~b~0) (- 4294967296))) aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (+ 3 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 (div (+ c_~a~0 (* c_~b~0 (- 1)) (* (mod c_~b~0 4294967296) (- 1))) 4294967296))) (<= .cse8 c_~a~0) (<= .cse8 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse7) 4294967296) 0))))))) (or (<= .cse5 .cse4) (not (= (mod (+ (* c_~a~0 4294967295) c_~b~0 (* .cse4 4294967295)) 4294967296) 0)) (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse10 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse9 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse9) 4294967296) 0)) (<= 4294967296 .cse10) (<= .cse10 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse9) 4294967296) 0)))))))) is different from true [2021-11-07 01:32:10,621 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_ULTIMATE.start_main_~b_in~0 4294967296)) (.cse1 (mod c_~a~0 4294967296)) (.cse2 (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse4 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse3 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse3) 4294967296) 0)) (<= 4294967296 .cse4) (<= .cse4 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse3) 4294967296) 0))))))) (and (or (= c_ULTIMATE.start_main_~a_in~0 c_~a~0) (and (= c_ULTIMATE.start_main_~a_in~0 (+ c_ULTIMATE.start_main_~b_in~0 c_~a~0)) (< .cse0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)))) (= (mod (+ c_~a~0 .cse1 (* c_ULTIMATE.start_main_~b_in~0 4294967295)) (- 4294967296)) 0) (< .cse1 .cse0) .cse2 (or (<= (mod c_~b~0 4294967296) .cse1) (not (= (mod (+ (* c_~a~0 4294967295) c_~b~0 (* .cse1 4294967295)) 4294967296) 0)) .cse2))) is different from false [2021-11-07 01:32:12,654 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_ULTIMATE.start_main_~b_in~0 4294967296)) (.cse0 (* c_~a~0 4294967294)) (.cse6 (mod c_~b~0 4294967296)) (.cse5 (mod c_~a~0 4294967296)) (.cse10 (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse12 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse11 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse11) 4294967296) 0)) (<= 4294967296 .cse12) (<= .cse12 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse11) 4294967296) 0))))))) (and (or (not (= (mod (+ .cse0 c_~b~0) 4294967296) 0)) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse2 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (let ((.cse1 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 4294967295)) 4294967296)) (.cse3 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse2 4294967296))) (or (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse1) 4294967296) 0)) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102 .cse2 1)) (<= (+ (* 2 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (* 4 (div (+ (- 1) (* c_~a~0 (- 1))) (- 4294967296)))) (+ 7 (div (+ c_~a~0 (* (mod c_~b~0 4294967296) (- 1))) 4294967296) (div (+ c_~a~0 (- 4294967296)) 4294967296) (* 2 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse1) 4294967296) 0)) (<= .cse3 c_~a~0) (<= .cse3 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_102)))))) (or (= c_ULTIMATE.start_main_~a_in~0 c_~a~0) (and (= c_ULTIMATE.start_main_~a_in~0 (+ c_ULTIMATE.start_main_~b_in~0 c_~a~0)) (< .cse4 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)))) (= (mod (+ c_~a~0 .cse5 (* c_ULTIMATE.start_main_~b_in~0 4294967295)) (- 4294967296)) 0) (< .cse5 .cse4) (or (not (= (mod (+ (* c_~b~0 3) .cse0) 4294967296) 0)) (<= .cse5 .cse6) (forall ((aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117))) (let ((.cse9 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse7 c_~b~0 4294967296)) (.cse8 (mod (+ c_~a~0 (* aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 4294967295) (* c_~b~0 4294967295)) 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117) (<= c_~a~0 (+ aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 .cse7 c_~b~0 1)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse8) 4294967296) 0)) (<= (+ (* 2 (div (+ (- 1) (* c_~a~0 (- 1)) c_~b~0) (- 4294967296))) aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (+ 3 aux_div_aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72_117 (div (+ c_~a~0 (* c_~b~0 (- 1)) (* (mod c_~b~0 4294967296) (- 1))) 4294967296))) (<= .cse9 c_~a~0) (<= .cse9 (+ c_~a~0 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse8) 4294967296) 0))))))) .cse10 (or (<= .cse6 .cse5) (not (= (mod (+ (* c_~a~0 4294967295) c_~b~0 (* .cse5 4294967295)) 4294967296) 0)) .cse10))) is different from false [2021-11-07 01:32:39,103 WARN L207 SmtUtils]: Spent 7.60 s on a formula simplification that was a NOOP. DAG size: 124 [2021-11-07 01:33:08,517 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~a~0 4294967296)) (.cse0 (mod c_ULTIMATE.start_main_~b_in~0 4294967296))) (and (or (= c_ULTIMATE.start_main_~a_in~0 c_~a~0) (and (= c_ULTIMATE.start_main_~a_in~0 (+ c_ULTIMATE.start_main_~b_in~0 c_~a~0)) (< .cse0 (mod c_ULTIMATE.start_main_~a_in~0 4294967296)))) (= (mod (+ c_~a~0 .cse1 (* c_ULTIMATE.start_main_~b_in~0 4294967295)) (- 4294967296)) 0) (< .cse1 .cse0) (forall ((aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int) (aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 Int)) (let ((.cse3 (+ aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72))) (.cse2 (mod aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 4294967296))) (or (<= 4294967296 aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72) (<= aux_mod_aux_mod_v_ULTIMATE.start_check_gcd_~guessed_gcd~0_77_61_72 1) (not (= (mod (mod (mod c_ULTIMATE.start_main_~a_in~0 4294967296) .cse2) 4294967296) 0)) (<= 4294967296 .cse3) (<= .cse3 (mod c_~a~0 4294967296)) (not (= (mod (mod (mod c_ULTIMATE.start_main_~b_in~0 4294967296) .cse2) 4294967296) 0))))))) is different from false