./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0 --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 64bit --witnessprinter.graph.data.programhash ecdd92537224765109e6dc87add95fccbb3577c40656fa807e1aa68ef45fa853 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 16:19:28,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:19:28,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:19:28,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:19:28,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:19:28,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:19:28,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:19:28,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:19:28,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:19:28,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:19:28,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:19:28,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:19:28,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:19:28,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:19:28,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:19:28,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:19:28,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:19:28,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:19:28,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:19:28,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:19:28,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:19:28,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:19:28,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:19:28,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:19:28,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:19:28,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:19:28,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:19:28,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:19:28,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:19:28,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:19:28,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:19:28,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:19:28,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:19:28,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:19:28,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:19:28,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:19:28,878 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:19:28,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:19:28,879 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:19:28,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:19:28,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:19:28,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 16:19:28,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:19:28,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:19:28,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:19:28,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:19:28,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:19:28,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:19:28,908 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:19:28,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:19:28,908 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:19:28,909 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:19:28,909 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:19:28,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:19:28,909 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:19:28,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:19:28,910 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:19:28,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:19:28,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:19:28,911 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:19:28,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:19:28,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:19:28,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:19:28,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:19:28,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:19:28,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:19:28,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:19:28,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:19:28,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:19:28,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:19:28,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:19:28,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:19:28,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:19:28,915 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:19:28,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:19:28,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:19:28,916 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:19:28,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:19:28,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:19:28,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:19:28,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecdd92537224765109e6dc87add95fccbb3577c40656fa807e1aa68ef45fa853 [2022-11-16 16:19:29,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:19:29,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:19:29,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:19:29,213 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:19:29,214 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:19:29,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2022-11-16 16:19:29,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/ab86691d7/940b039f3b5e43eeb306ddcd3af4c6cb/FLAG68c20206f [2022-11-16 16:19:29,824 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:19:29,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2022-11-16 16:19:29,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/ab86691d7/940b039f3b5e43eeb306ddcd3af4c6cb/FLAG68c20206f [2022-11-16 16:19:30,199 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/ab86691d7/940b039f3b5e43eeb306ddcd3af4c6cb [2022-11-16 16:19:30,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:19:30,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:19:30,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:19:30,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:19:30,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:19:30,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eaf7658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30, skipping insertion in model container [2022-11-16 16:19:30,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:19:30,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:19:30,525 WARN L229 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_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1107,1120] [2022-11-16 16:19:30,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:19:30,623 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:19:30,646 WARN L229 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_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1107,1120] [2022-11-16 16:19:30,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:19:30,729 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:19:30,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30 WrapperNode [2022-11-16 16:19:30,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:19:30,731 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:19:30,731 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:19:30,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:19:30,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,800 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 134 [2022-11-16 16:19:30,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:19:30,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:19:30,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:19:30,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:19:30,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:19:30,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:19:30,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:19:30,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:19:30,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (1/1) ... [2022-11-16 16:19:30,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:19:30,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:30,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:19:30,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:19:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:19:30,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:19:31,112 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:19:31,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:19:31,332 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:19:31,678 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:19:31,679 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 16:19:31,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:19:31 BoogieIcfgContainer [2022-11-16 16:19:31,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:19:31,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:19:31,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:19:31,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:19:31,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:19:30" (1/3) ... [2022-11-16 16:19:31,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5520642a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:19:31, skipping insertion in model container [2022-11-16 16:19:31,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:30" (2/3) ... [2022-11-16 16:19:31,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5520642a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:19:31, skipping insertion in model container [2022-11-16 16:19:31,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:19:31" (3/3) ... [2022-11-16 16:19:31,706 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.paper_v3.c [2022-11-16 16:19:31,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:19:31,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:19:31,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:19:31,800 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e122cb5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:19:31,801 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:19:31,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 16:19:31,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:31,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 16:19:31,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 3714106, now seen corresponding path program 1 times [2022-11-16 16:19:31,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:19:31,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735631782] [2022-11-16 16:19:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:31,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:19:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:19:32,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 16:19:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:19:32,180 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 16:19:32,184 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 16:19:32,186 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 16:19:32,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:19:32,195 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-16 16:19:32,200 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 16:19:32,217 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-16 16:19:32,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 04:19:32 BoogieIcfgContainer [2022-11-16 16:19:32,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 16:19:32,225 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 16:19:32,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 16:19:32,226 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 16:19:32,226 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:19:31" (3/4) ... [2022-11-16 16:19:32,231 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-16 16:19:32,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 16:19:32,232 INFO L158 Benchmark]: Toolchain (without parser) took 2028.04ms. Allocated memory is still 115.3MB. Free memory was 74.2MB in the beginning and 80.9MB in the end (delta: -6.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:19:32,235 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 115.3MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:19:32,236 INFO L158 Benchmark]: CACSL2BoogieTranslator took 523.38ms. Allocated memory is still 115.3MB. Free memory was 74.0MB in the beginning and 88.5MB in the end (delta: -14.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 16:19:32,238 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.28ms. Allocated memory is still 115.3MB. Free memory was 88.5MB in the beginning and 86.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:19:32,240 INFO L158 Benchmark]: Boogie Preprocessor took 60.98ms. Allocated memory is still 115.3MB. Free memory was 86.3MB in the beginning and 84.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:19:32,241 INFO L158 Benchmark]: RCFGBuilder took 813.37ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 49.2MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-16 16:19:32,241 INFO L158 Benchmark]: TraceAbstraction took 540.22ms. Allocated memory is still 115.3MB. Free memory was 48.7MB in the beginning and 81.5MB in the end (delta: -32.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:19:32,242 INFO L158 Benchmark]: Witness Printer took 5.94ms. Allocated memory is still 115.3MB. Free memory was 81.5MB in the beginning and 80.9MB in the end (delta: 618.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:19:32,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 115.3MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 523.38ms. Allocated memory is still 115.3MB. Free memory was 74.0MB in the beginning and 88.5MB in the end (delta: -14.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.28ms. Allocated memory is still 115.3MB. Free memory was 88.5MB in the beginning and 86.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.98ms. Allocated memory is still 115.3MB. Free memory was 86.3MB in the beginning and 84.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 813.37ms. Allocated memory is still 115.3MB. Free memory was 84.8MB in the beginning and 49.2MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 540.22ms. Allocated memory is still 115.3MB. Free memory was 48.7MB in the beginning and 81.5MB in the end (delta: -32.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.94ms. Allocated memory is still 115.3MB. Free memory was 81.5MB in the beginning and 80.9MB in the end (delta: 618.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 54, overapproximation of bitwiseAnd at line 59. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_3 var_4 = 0; [L32] const SORT_1 var_13 = 1; [L33] const SORT_3 var_19 = 255; [L34] const SORT_3 var_23 = 1; [L36] SORT_1 input_2; [L38] SORT_3 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L39] SORT_3 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L41] SORT_3 init_6_arg_1 = var_4; [L42] state_5 = init_6_arg_1 [L43] SORT_3 init_8_arg_1 = var_4; [L44] state_7 = init_8_arg_1 VAL [init_6_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_3=255, msb_SORT_1=1, msb_SORT_3=128, state_5=0, state_7=0, var_13=1, var_19=255, var_23=1, var_4=0] [L47] input_2 = __VERIFIER_nondet_uchar() [L50] SORT_3 var_9_arg_0 = state_5; [L51] SORT_3 var_9_arg_1 = state_7; [L52] SORT_1 var_9 = var_9_arg_0 > var_9_arg_1; [L53] SORT_1 var_10_arg_0 = var_9; [L54] SORT_1 var_10 = ~var_10_arg_0; [L55] SORT_1 var_14_arg_0 = var_10; [L56] SORT_1 var_14 = ~var_14_arg_0; [L57] SORT_1 var_15_arg_0 = var_13; [L58] SORT_1 var_15_arg_1 = var_14; [L59] SORT_1 var_15 = var_15_arg_0 & var_15_arg_1; [L60] var_15 = var_15 & mask_SORT_1 [L61] SORT_1 bad_16_arg_0 = var_15; [L62] CALL __VERIFIER_assert(!(bad_16_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-16 16:19:32,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0 --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 64bit --witnessprinter.graph.data.programhash ecdd92537224765109e6dc87add95fccbb3577c40656fa807e1aa68ef45fa853 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 16:19:34,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:19:34,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:19:34,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:19:34,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:19:34,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:19:34,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:19:34,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:19:34,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:19:34,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:19:34,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:19:34,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:19:34,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:19:34,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:19:34,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:19:34,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:19:34,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:19:34,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:19:34,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:19:34,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:19:34,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:19:34,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:19:34,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:19:34,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:19:35,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:19:35,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:19:35,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:19:35,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:19:35,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:19:35,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:19:35,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:19:35,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:19:35,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:19:35,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:19:35,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:19:35,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:19:35,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:19:35,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:19:35,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:19:35,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:19:35,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:19:35,021 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-16 16:19:35,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:19:35,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:19:35,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:19:35,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:19:35,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:19:35,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:19:35,071 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:19:35,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:19:35,072 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:19:35,072 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:19:35,073 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:19:35,073 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:19:35,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:19:35,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:19:35,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:19:35,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:19:35,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:19:35,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 16:19:35,076 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 16:19:35,076 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 16:19:35,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:19:35,077 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:19:35,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:19:35,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:19:35,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 16:19:35,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:19:35,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:19:35,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:19:35,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:19:35,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:19:35,080 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 16:19:35,080 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 16:19:35,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:19:35,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:19:35,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 16:19:35,081 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecdd92537224765109e6dc87add95fccbb3577c40656fa807e1aa68ef45fa853 [2022-11-16 16:19:35,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:19:35,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:19:35,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:19:35,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:19:35,655 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:19:35,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2022-11-16 16:19:35,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/3e618c844/7bf867c659cc4c47865022056df29e44/FLAG7814766f9 [2022-11-16 16:19:36,490 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:19:36,495 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c [2022-11-16 16:19:36,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/3e618c844/7bf867c659cc4c47865022056df29e44/FLAG7814766f9 [2022-11-16 16:19:36,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/data/3e618c844/7bf867c659cc4c47865022056df29e44 [2022-11-16 16:19:36,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:19:36,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:19:36,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:19:36,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:19:36,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:19:36,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:19:36" (1/1) ... [2022-11-16 16:19:36,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d993643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:36, skipping insertion in model container [2022-11-16 16:19:36,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:19:36" (1/1) ... [2022-11-16 16:19:36,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:19:36,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:19:37,011 WARN L229 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_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1107,1120] [2022-11-16 16:19:37,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:19:37,070 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:19:37,079 WARN L229 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_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.paper_v3.c[1107,1120] [2022-11-16 16:19:37,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:19:37,161 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:19:37,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37 WrapperNode [2022-11-16 16:19:37,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:19:37,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:19:37,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:19:37,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:19:37,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,211 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2022-11-16 16:19:37,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:19:37,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:19:37,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:19:37,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:19:37,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,284 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:19:37,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:19:37,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:19:37,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:19:37,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (1/1) ... [2022-11-16 16:19:37,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:19:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:37,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:19:37,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:19:37,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:19:37,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:19:37,565 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:19:37,568 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:19:37,828 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:19:37,838 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:19:37,838 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 16:19:37,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:19:37 BoogieIcfgContainer [2022-11-16 16:19:37,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:19:37,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:19:37,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:19:37,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:19:37,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:19:36" (1/3) ... [2022-11-16 16:19:37,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc5ffb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:19:37, skipping insertion in model container [2022-11-16 16:19:37,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:19:37" (2/3) ... [2022-11-16 16:19:37,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc5ffb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:19:37, skipping insertion in model container [2022-11-16 16:19:37,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:19:37" (3/3) ... [2022-11-16 16:19:37,896 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.paper_v3.c [2022-11-16 16:19:37,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:19:37,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:19:38,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:19:38,014 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@12b6bdb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:19:38,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:19:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:19:38,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:38,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:19:38,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-16 16:19:38,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:38,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414592083] [2022-11-16 16:19:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:38,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:38,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:38,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 16:19:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:38,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:19:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:38,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:19:38,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:19:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414592083] [2022-11-16 16:19:38,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414592083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:19:38,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:19:38,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:19:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617859113] [2022-11-16 16:19:38,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:19:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:19:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:19:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:19:38,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:19:38,551 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:38,611 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-16 16:19:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 16:19:38,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:19:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:38,625 INFO L225 Difference]: With dead ends: 20 [2022-11-16 16:19:38,625 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 16:19:38,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:19:38,634 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:38,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:19:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 16:19:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-16 16:19:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-16 16:19:38,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-16 16:19:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:38,672 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-16 16:19:38,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-16 16:19:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:19:38,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:38,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:19:38,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:38,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:38,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-16 16:19:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222435957] [2022-11-16 16:19:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:38,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:38,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:38,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:38,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 16:19:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:38,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 16:19:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:39,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:40,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:19:40,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222435957] [2022-11-16 16:19:40,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222435957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:40,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008260454] [2022-11-16 16:19:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:40,833 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:19:40,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:19:40,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:19:40,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-16 16:19:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:40,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 16:19:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:41,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1008260454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:43,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435896252] [2022-11-16 16:19:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:19:43,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:43,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:43,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:19:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:19:43,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 16:19:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:43,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435896252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:44,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:19:44,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 12 [2022-11-16 16:19:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763906866] [2022-11-16 16:19:44,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:19:44,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:19:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:19:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:19:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:19:44,348 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-11-16 16:19:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:44,470 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-16 16:19:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 16:19:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 8 [2022-11-16 16:19:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:44,472 INFO L225 Difference]: With dead ends: 16 [2022-11-16 16:19:44,472 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 16:19:44,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:19:44,474 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:44,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-16 16:19:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 16:19:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-16 16:19:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-16 16:19:44,480 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-16 16:19:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:44,480 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-16 16:19:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-11-16 16:19:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-16 16:19:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:19:44,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:44,481 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 16:19:44,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2022-11-16 16:19:44,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:44,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-16 16:19:45,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:45,082 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:45,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-16 16:19:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:45,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537357819] [2022-11-16 16:19:45,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:19:45,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:45,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:45,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:45,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 16:19:45,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:19:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 16:19:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:45,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:47,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 16:19:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537357819] [2022-11-16 16:19:47,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537357819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768146156] [2022-11-16 16:19:47,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:19:47,081 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 16:19:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 16:19:47,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 16:19:47,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-16 16:19:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:19:47,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:47,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 16:19:47,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:47,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:49,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768146156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:49,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663279563] [2022-11-16 16:19:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 16:19:49,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:19:49,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:19:49,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:19:49,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 16:19:49,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 16:19:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:49,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:19:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663279563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:19:50,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 16:19:50,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2022-11-16 16:19:50,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819636504] [2022-11-16 16:19:50,681 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 16:19:50,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:19:50,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 16:19:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:19:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:19:50,685 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:19:50,873 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-11-16 16:19:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:19:50,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:19:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:19:50,874 INFO L225 Difference]: With dead ends: 21 [2022-11-16 16:19:50,874 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 16:19:50,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-11-16 16:19:50,876 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:19:50,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-16 16:19:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 16:19:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-16 16:19:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-11-16 16:19:50,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-11-16 16:19:50,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:19:50,883 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-11-16 16:19:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:19:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-11-16 16:19:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:19:50,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:19:50,884 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2022-11-16 16:19:50,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-16 16:19:51,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-16 16:19:51,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:19:51,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:19:51,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:19:51,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:19:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1250702327, now seen corresponding path program 3 times [2022-11-16 16:19:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 16:19:51,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414625948] [2022-11-16 16:19:51,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:19:51,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 16:19:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 16:19:51,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 16:19:51,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77317dc5-ae8a-4081-a089-5da3d6ce8cd7/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 16:19:51,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 16:19:51,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:19:51,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 153 conjunts are in the unsatisfiable core [2022-11-16 16:19:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:19:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:19:52,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:20:02,050 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 258 DAG size of output: 177 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 16:30:34,159 WARN L233 SmtUtils]: Spent 10.38m on a formula simplification. DAG size of input: 500 DAG size of output: 242 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)