./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dd421a3080bb23029889fd11d2acb487f62ce5e4deec439404f83b87ad86a470 --- 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 11:07:33,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:07:33,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:07:33,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:07:33,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:07:33,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:07:33,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:07:33,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:07:33,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:07:33,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:07:33,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:07:33,817 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:07:33,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:07:33,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:07:33,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:07:33,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:07:33,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:07:33,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:07:33,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:07:33,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:07:33,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:07:33,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:07:33,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:07:33,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:07:33,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:07:33,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:07:33,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:07:33,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:07:33,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:07:33,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:07:33,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:07:33,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:07:33,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:07:33,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:07:33,859 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:07:33,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:07:33,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:07:33,860 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:07:33,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:07:33,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:07:33,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:07:33,863 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:07:33,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:07:33,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:07:33,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:07:33,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:07:33,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:07:33,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:07:33,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:07:33,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:07:33,919 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:07:33,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:07:33,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:07:33,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:07:33,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:07:33,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:07:33,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:07:33,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:07:33,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:07:33,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:07:33,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:07:33,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:07:33,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:07:33,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:07:33,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:07:33,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:07:33,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:07:33,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:07:33,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:07:33,926 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:07:33,926 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:07:33,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:07:33,926 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_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd421a3080bb23029889fd11d2acb487f62ce5e4deec439404f83b87ad86a470 [2022-11-16 11:07:34,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:07:34,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:07:34,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:07:34,291 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:07:34,292 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:07:34,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c [2022-11-16 11:07:34,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/54c5f5a5b/1f67889dae554fa6bf869e544ba794f4/FLAG219d609b2 [2022-11-16 11:07:35,209 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:07:35,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c [2022-11-16 11:07:35,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/54c5f5a5b/1f67889dae554fa6bf869e544ba794f4/FLAG219d609b2 [2022-11-16 11:07:35,726 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/54c5f5a5b/1f67889dae554fa6bf869e544ba794f4 [2022-11-16 11:07:35,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:07:35,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:07:35,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:07:35,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:07:35,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:07:35,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:35" (1/1) ... [2022-11-16 11:07:35,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f58f36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:35, skipping insertion in model container [2022-11-16 11:07:35,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:35" (1/1) ... [2022-11-16 11:07:35,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:07:35,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:07:36,275 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_2ed18590-4896-45d3-9323-0d98ce3cf83a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c[1014,1027] [2022-11-16 11:07:37,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:07:37,230 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:07:37,241 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_2ed18590-4896-45d3-9323-0d98ce3cf83a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c[1014,1027] [2022-11-16 11:07:37,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:07:37,874 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:07:37,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37 WrapperNode [2022-11-16 11:07:37,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:07:37,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:07:37,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:07:37,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:07:37,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:38,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:38,829 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 15902 [2022-11-16 11:07:38,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:07:38,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:07:38,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:07:38,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:07:38,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:38,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:07:39,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:07:39,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:07:39,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:07:39,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (1/1) ... [2022-11-16 11:07:39,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:07:39,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:39,808 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:07:39,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:07:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:07:39,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:07:41,403 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:07:41,405 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:08:05,596 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:08:05,635 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:08:05,635 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:08:05,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:05 BoogieIcfgContainer [2022-11-16 11:08:05,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:08:05,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:08:05,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:08:05,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:08:05,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:07:35" (1/3) ... [2022-11-16 11:08:05,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528e16a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:05, skipping insertion in model container [2022-11-16 11:08:05,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:37" (2/3) ... [2022-11-16 11:08:05,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528e16a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:08:05, skipping insertion in model container [2022-11-16 11:08:05,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:08:05" (3/3) ... [2022-11-16 11:08:05,656 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rether.4.prop1-back-serstep.c [2022-11-16 11:08:05,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:08:05,677 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:08:05,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:08:05,819 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=PETRI_NET, 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;@1cbde333, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:08:05,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:08:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 2726 states, 2724 states have (on average 1.6659324522760646) internal successors, (4538), 2725 states have internal predecessors, (4538), 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 11:08:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-11-16 11:08:05,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:05,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:05,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1752414913, now seen corresponding path program 1 times [2022-11-16 11:08:05,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:05,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35571130] [2022-11-16 11:08:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:05,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:08,968 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 11:08:08,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:08,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35571130] [2022-11-16 11:08:08,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35571130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:08,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:08,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:08:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023627057] [2022-11-16 11:08:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:08,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:08:08,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:08:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:08:09,029 INFO L87 Difference]: Start difference. First operand has 2726 states, 2724 states have (on average 1.6659324522760646) internal successors, (4538), 2725 states have internal predecessors, (4538), 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 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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 11:08:11,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:13,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:14,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:14,690 INFO L93 Difference]: Finished difference Result 8950 states and 14912 transitions. [2022-11-16 11:08:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:08:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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 529 [2022-11-16 11:08:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:14,745 INFO L225 Difference]: With dead ends: 8950 [2022-11-16 11:08:14,745 INFO L226 Difference]: Without dead ends: 6226 [2022-11-16 11:08:14,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:08:14,760 INFO L413 NwaCegarLoop]: 5840 mSDtfsCounter, 13572 mSDsluCounter, 7143 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13572 SdHoareTripleChecker+Valid, 12983 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:14,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13572 Valid, 12983 Invalid, 19 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 11:08:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2022-11-16 11:08:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 2724. [2022-11-16 11:08:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.6650752846125596) internal successors, (4534), 2723 states have internal predecessors, (4534), 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 11:08:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4534 transitions. [2022-11-16 11:08:14,924 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4534 transitions. Word has length 529 [2022-11-16 11:08:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:14,928 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 4534 transitions. [2022-11-16 11:08:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 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 11:08:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4534 transitions. [2022-11-16 11:08:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-11-16 11:08:14,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:14,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:08:14,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1511500219, now seen corresponding path program 1 times [2022-11-16 11:08:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:14,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834220096] [2022-11-16 11:08:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:18,087 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 11:08:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834220096] [2022-11-16 11:08:18,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834220096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:18,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:18,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:08:18,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242810780] [2022-11-16 11:08:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:18,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:08:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:18,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:08:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:08:18,103 INFO L87 Difference]: Start difference. First operand 2724 states and 4534 transitions. Second operand has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 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 11:08:20,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:23,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:08:23,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:23,898 INFO L93 Difference]: Finished difference Result 10093 states and 16808 transitions. [2022-11-16 11:08:23,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:08:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 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 530 [2022-11-16 11:08:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:23,928 INFO L225 Difference]: With dead ends: 10093 [2022-11-16 11:08:23,928 INFO L226 Difference]: Without dead ends: 7371 [2022-11-16 11:08:23,933 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 11:08:23,935 INFO L413 NwaCegarLoop]: 4528 mSDtfsCounter, 10436 mSDsluCounter, 9052 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10436 SdHoareTripleChecker+Valid, 13580 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:23,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10436 Valid, 13580 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-16 11:08:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-16 11:08:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 3509. [2022-11-16 11:08:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.6650513112884835) internal successors, (5841), 3508 states have internal predecessors, (5841), 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 11:08:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 5841 transitions. [2022-11-16 11:08:24,072 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 5841 transitions. Word has length 530 [2022-11-16 11:08:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:24,074 INFO L495 AbstractCegarLoop]: Abstraction has 3509 states and 5841 transitions. [2022-11-16 11:08:24,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 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 11:08:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 5841 transitions. [2022-11-16 11:08:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2344 [2022-11-16 11:08:24,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:24,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:24,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:08:24,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1974401390, now seen corresponding path program 1 times [2022-11-16 11:08:24,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:24,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869557595] [2022-11-16 11:08:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:25,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:08:25,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29577536] [2022-11-16 11:08:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:25,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:25,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:25,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:08:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 19659 conjuncts, 151 conjunts are in the unsatisfiable core [2022-11-16 11:08:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:47,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:47,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869557595] [2022-11-16 11:08:47,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:08:47,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29577536] [2022-11-16 11:08:47,195 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-16 11:08:47,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:08:47,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:47,397 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 11:08:47,400 INFO L158 Benchmark]: Toolchain (without parser) took 71668.98ms. Allocated memory was 113.2MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 78.5MB in the beginning and 2.5GB in the end (delta: -2.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-16 11:08:47,401 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:08:47,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2142.71ms. Allocated memory was 113.2MB in the beginning and 264.2MB in the end (delta: 151.0MB). Free memory was 78.2MB in the beginning and 148.2MB in the end (delta: -69.9MB). Peak memory consumption was 135.2MB. Max. memory is 16.1GB. [2022-11-16 11:08:47,401 INFO L158 Benchmark]: Boogie Procedure Inliner took 952.00ms. Allocated memory is still 264.2MB. Free memory was 148.2MB in the beginning and 72.3MB in the end (delta: 75.9MB). Peak memory consumption was 105.9MB. Max. memory is 16.1GB. [2022-11-16 11:08:47,402 INFO L158 Benchmark]: Boogie Preprocessor took 936.45ms. Allocated memory was 264.2MB in the beginning and 545.3MB in the end (delta: 281.0MB). Free memory was 72.3MB in the beginning and 302.3MB in the end (delta: -230.0MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2022-11-16 11:08:47,402 INFO L158 Benchmark]: RCFGBuilder took 25874.97ms. Allocated memory was 545.3MB in the beginning and 2.3GB in the end (delta: 1.8GB). Free memory was 302.3MB in the beginning and 1.8GB in the end (delta: -1.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-16 11:08:47,403 INFO L158 Benchmark]: TraceAbstraction took 41751.77ms. Allocated memory was 2.3GB in the beginning and 3.2GB in the end (delta: 855.6MB). Free memory was 1.8GB in the beginning and 2.5GB in the end (delta: -708.9MB). Peak memory consumption was 813.4MB. Max. memory is 16.1GB. [2022-11-16 11:08:47,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2142.71ms. Allocated memory was 113.2MB in the beginning and 264.2MB in the end (delta: 151.0MB). Free memory was 78.2MB in the beginning and 148.2MB in the end (delta: -69.9MB). Peak memory consumption was 135.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 952.00ms. Allocated memory is still 264.2MB. Free memory was 148.2MB in the beginning and 72.3MB in the end (delta: 75.9MB). Peak memory consumption was 105.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 936.45ms. Allocated memory was 264.2MB in the beginning and 545.3MB in the end (delta: 281.0MB). Free memory was 72.3MB in the beginning and 302.3MB in the end (delta: -230.0MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. * RCFGBuilder took 25874.97ms. Allocated memory was 545.3MB in the beginning and 2.3GB in the end (delta: 1.8GB). Free memory was 302.3MB in the beginning and 1.8GB in the end (delta: -1.4GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * TraceAbstraction took 41751.77ms. Allocated memory was 2.3GB in the beginning and 3.2GB in the end (delta: 855.6MB). Free memory was 1.8GB in the beginning and 2.5GB in the end (delta: -708.9MB). Peak memory consumption was 813.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 11:08:47,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dd421a3080bb23029889fd11d2acb487f62ce5e4deec439404f83b87ad86a470 --- 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 11:08:49,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:08:49,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:08:49,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:08:49,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:08:49,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:08:49,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:08:49,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:08:49,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:08:49,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:08:49,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:08:49,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:08:49,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:08:49,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:08:49,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:08:49,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:08:49,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:08:49,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:08:49,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:08:49,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:08:49,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:08:49,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:08:49,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:08:49,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:08:49,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:08:49,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:08:49,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:08:49,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:08:49,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:08:49,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:08:49,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:08:49,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:08:49,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:08:49,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:08:49,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:08:49,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:08:49,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:08:49,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:08:49,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:08:49,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:08:49,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:08:49,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-16 11:08:50,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:08:50,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:08:50,010 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:08:50,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:08:50,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:08:50,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:08:50,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:08:50,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:08:50,013 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:08:50,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:08:50,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:08:50,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:08:50,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:08:50,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:08:50,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:08:50,016 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:08:50,016 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:08:50,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:08:50,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:08:50,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:08:50,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:08:50,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:08:50,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:08:50,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:08:50,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:08:50,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:08:50,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:08:50,019 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:08:50,019 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:08:50,019 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:08:50,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:08:50,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:08:50,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:08:50,021 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_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd421a3080bb23029889fd11d2acb487f62ce5e4deec439404f83b87ad86a470 [2022-11-16 11:08:50,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:08:50,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:08:50,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:08:50,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:08:50,453 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:08:50,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c [2022-11-16 11:08:50,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/6672de330/c2f3351545a34bb98a9104bfc248096d/FLAGe1ad7e4b0 [2022-11-16 11:08:51,472 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:08:51,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c [2022-11-16 11:08:51,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/6672de330/c2f3351545a34bb98a9104bfc248096d/FLAGe1ad7e4b0 [2022-11-16 11:08:51,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/data/6672de330/c2f3351545a34bb98a9104bfc248096d [2022-11-16 11:08:51,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:08:51,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:08:51,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:08:51,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:08:51,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:08:51,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:08:51" (1/1) ... [2022-11-16 11:08:51,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e295403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:51, skipping insertion in model container [2022-11-16 11:08:51,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:08:51" (1/1) ... [2022-11-16 11:08:51,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:08:52,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:08:52,466 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_2ed18590-4896-45d3-9323-0d98ce3cf83a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c[1014,1027] [2022-11-16 11:08:53,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:08:53,599 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:08:53,612 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_2ed18590-4896-45d3-9323-0d98ce3cf83a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.4.prop1-back-serstep.c[1014,1027] [2022-11-16 11:08:54,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:08:54,197 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:08:54,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54 WrapperNode [2022-11-16 11:08:54,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:08:54,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:08:54,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:08:54,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:08:54,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:54,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:54,858 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 9567 [2022-11-16 11:08:54,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:08:54,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:08:54,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:08:54,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:08:54,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:54,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:54,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:54,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:55,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:55,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:55,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:55,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:55,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:08:55,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:08:55,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:08:55,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:08:55,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (1/1) ... [2022-11-16 11:08:55,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:08:55,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:55,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:08:55,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:08:55,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:08:55,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:08:56,942 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:08:56,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:09:28,646 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:09:28,655 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:09:28,656 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:09:28,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:09:28 BoogieIcfgContainer [2022-11-16 11:09:28,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:09:28,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:09:28,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:09:28,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:09:28,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:08:51" (1/3) ... [2022-11-16 11:09:28,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24596167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:09:28, skipping insertion in model container [2022-11-16 11:09:28,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:08:54" (2/3) ... [2022-11-16 11:09:28,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24596167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:09:28, skipping insertion in model container [2022-11-16 11:09:28,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:09:28" (3/3) ... [2022-11-16 11:09:28,670 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rether.4.prop1-back-serstep.c [2022-11-16 11:09:28,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:09:28,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:09:28,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:09:28,765 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=PETRI_NET, 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;@762a5079, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:09:28,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:09:28,771 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 11:09:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:09:28,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:28,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:09:28,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-16 11:09:28,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:09:28,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501633637] [2022-11-16 11:09:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:28,806 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 11:09:28,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:09:28,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:09:28,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:09:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:09:30,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:31,113 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 11:09:31,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:09:31,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:09:31,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501633637] [2022-11-16 11:09:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501633637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:31,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:31,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:09:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607206876] [2022-11-16 11:09:31,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:31,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:09:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:09:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:09:31,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:09:31,177 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 11:09:34,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:09:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:34,535 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-16 11:09:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:09:34,539 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 11:09:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:34,547 INFO L225 Difference]: With dead ends: 19 [2022-11-16 11:09:34,548 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 11:09:34,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:09:34,555 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:34,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-16 11:09:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 11:09:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-16 11:09:34,592 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 11:09:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-16 11:09:34,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-16 11:09:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:34,595 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-16 11:09:34,596 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 11:09:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-16 11:09:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:09:34,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:34,597 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:34,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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)] Ended with exit code 0 [2022-11-16 11:09:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:09:34,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-16 11:09:34,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:09:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316442478] [2022-11-16 11:09:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:34,810 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 11:09:34,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:09:34,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:09:34,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:10:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 8600 conjuncts, 224 conjunts are in the unsatisfiable core [2022-11-16 11:10:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:03,857 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 11:10:03,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:14,996 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 11:10:14,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:10:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316442478] [2022-11-16 11:10:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316442478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:10:14,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:10:14,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 11:10:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271495571] [2022-11-16 11:10:14,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:15,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:10:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:10:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:10:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:10:15,001 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 11:10:18,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:21,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:10:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:21,195 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-11-16 11:10:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:10:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 11:10:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:21,197 INFO L225 Difference]: With dead ends: 15 [2022-11-16 11:10:21,197 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 11:10:21,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:10:21,199 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:21,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 2 Unknown, 6 Unchecked, 5.5s Time] [2022-11-16 11:10:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 11:10:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-16 11:10:21,202 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 11:10:21,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-16 11:10:21,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-16 11:10:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:21,204 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-16 11:10:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 11:10:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-16 11:10:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:10:21,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:21,205 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 11:10:21,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:10:21,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-16 11:10:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:10:21,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008233554] [2022-11-16 11:10:21,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:10:21,424 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 11:10:21,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:10:21,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:10:21,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 (4)] Waiting until timeout for monitored process [2022-11-16 11:11:34,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:11:34,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 16248 conjuncts, 558 conjunts are in the unsatisfiable core [2022-11-16 11:11:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:03,825 WARN L233 SmtUtils]: Spent 15.43s on a formula simplification. DAG size of input: 792 DAG size of output: 790 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:12:07,492 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 11:12:07,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:36,432 WARN L233 SmtUtils]: Spent 9.74s on a formula simplification that was a NOOP. DAG size: 1349 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:13:38,339 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 11:13:38,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008233554] [2022-11-16 11:13:38,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008233554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:38,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:13:38,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-16 11:13:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518116970] [2022-11-16 11:13:38,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:38,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:13:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:13:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:13:38,344 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 11:13:41,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:14:03,407 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 792 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:14:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:03,702 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2022-11-16 11:14:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:14:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 11:14:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:03,703 INFO L225 Difference]: With dead ends: 18 [2022-11-16 11:14:03,704 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 11:14:03,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 113.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:14:03,705 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:03,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 1 Unknown, 11 Unchecked, 3.1s Time] [2022-11-16 11:14:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 11:14:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-16 11:14:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 11:14:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-16 11:14:03,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2022-11-16 11:14:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:03,718 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-16 11:14:03,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 11:14:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-16 11:14:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:14:03,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:03,719 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2022-11-16 11:14:03,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:03,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:14:03,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1580781475, now seen corresponding path program 3 times [2022-11-16 11:14:03,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:03,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616045518] [2022-11-16 11:14:03,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:14:03,956 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 11:14:03,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:03,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 11:14:03,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed18590-4896-45d3-9323-0d98ce3cf83a/bin/uautomizer-tPACEb0tL8/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 (5)] Waiting until timeout for monitored process [2022-11-16 11:17:45,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:17:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 23896 conjuncts, 1937 conjunts are in the unsatisfiable core [2022-11-16 11:17:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:29,771 WARN L233 SmtUtils]: Spent 2.14m on a formula simplification. DAG size of input: 1324 DAG size of output: 1316 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)