./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro --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 32bit --witnessprinter.graph.data.programhash 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:58:51,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:58:51,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:58:51,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:58:51,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:58:51,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:58:51,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:58:51,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:58:51,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:58:51,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:58:51,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:58:51,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:58:51,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:58:51,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:58:51,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:58:51,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:58:51,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:58:51,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:58:51,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:58:51,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:58:51,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:58:51,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:58:51,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:58:51,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:58:51,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:58:51,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:58:51,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:58:51,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:58:51,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:58:51,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:58:51,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:58:51,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:58:51,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:58:51,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:58:51,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:58:51,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:58:51,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:58:51,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:58:51,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:58:51,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:58:51,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:58:51,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:58:51,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:58:51,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:58:51,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:58:51,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:58:51,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:58:51,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:58:51,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:58:51,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:58:51,928 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:58:51,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:58:51,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:58:51,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:58:51,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:58:51,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:58:51,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:58:51,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:58:51,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:58:51,930 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:58:51,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:58:51,931 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:58:51,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:58:51,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:58:51,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:58:51,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:58:51,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:58:51,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:58:51,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:58:51,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:58:51,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:58:51,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:58:51,933 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:58:51,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:58:51,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:58:51,934 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_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b75ecb951567bcc8ce71aeb3e25d04f795cdcdda48b1113da4558d335596a9c [2022-11-18 20:58:52,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:58:52,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:58:52,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:58:52,310 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:58:52,314 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:58:52,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-11-18 20:58:52,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/data/63f2df602/c47fef75862b488fbba8f4bcce8d45e8/FLAG3abeb14dd [2022-11-18 20:58:53,033 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:58:53,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/sv-benchmarks/c/reducercommutativity/sep20-1.i [2022-11-18 20:58:53,042 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/data/63f2df602/c47fef75862b488fbba8f4bcce8d45e8/FLAG3abeb14dd [2022-11-18 20:58:53,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/data/63f2df602/c47fef75862b488fbba8f4bcce8d45e8 [2022-11-18 20:58:53,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:58:53,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:58:53,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:58:53,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:58:53,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:58:53,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d68c7d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53, skipping insertion in model container [2022-11-18 20:58:53,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:58:53,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:58:53,615 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2022-11-18 20:58:53,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:58:53,628 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:58:53,650 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/sv-benchmarks/c/reducercommutativity/sep20-1.i[1293,1306] [2022-11-18 20:58:53,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:58:53,665 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:58:53,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53 WrapperNode [2022-11-18 20:58:53,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:58:53,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:58:53,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:58:53,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:58:53,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,702 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-18 20:58:53,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:58:53,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:58:53,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:58:53,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:58:53,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:58:53,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:58:53,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:58:53,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:58:53,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (1/1) ... [2022-11-18 20:58:53,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:58:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:53,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:58:53,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:58:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:58:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:58:53,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:58:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:58:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:58:53,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:58:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:58:53,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:58:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-18 20:58:53,822 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-18 20:58:53,907 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:58:53,909 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:58:54,217 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:58:54,231 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:58:54,231 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:58:54,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:58:54 BoogieIcfgContainer [2022-11-18 20:58:54,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:58:54,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:58:54,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:58:54,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:58:54,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:58:53" (1/3) ... [2022-11-18 20:58:54,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb11a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:58:54, skipping insertion in model container [2022-11-18 20:58:54,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:58:53" (2/3) ... [2022-11-18 20:58:54,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb11a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:58:54, skipping insertion in model container [2022-11-18 20:58:54,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:58:54" (3/3) ... [2022-11-18 20:58:54,248 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2022-11-18 20:58:54,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:58:54,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:58:54,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:58:54,395 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;@524df09d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:58:54,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:58:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:58:54,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:54,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:54,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-11-18 20:58:54,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285678196] [2022-11-18 20:58:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:54,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-18 20:58:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:54,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:58:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 20:58:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:58:54,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:54,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285678196] [2022-11-18 20:58:54,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285678196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:54,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:54,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:58:54,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938638675] [2022-11-18 20:58:54,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:54,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:54,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:54,967 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:58:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:55,029 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-11-18 20:58:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:55,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-18 20:58:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:55,047 INFO L225 Difference]: With dead ends: 52 [2022-11-18 20:58:55,047 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 20:58:55,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:55,057 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:55,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:58:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 20:58:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-18 20:58:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-18 20:58:55,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-11-18 20:58:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:55,105 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-18 20:58:55,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:58:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-18 20:58:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:58:55,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:55,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:58:55,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-11-18 20:58:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:55,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307582915] [2022-11-18 20:58:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:55,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:55,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:58:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-18 20:58:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:55,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-18 20:58:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:58:55,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:55,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307582915] [2022-11-18 20:58:55,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307582915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:55,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32873341] [2022-11-18 20:58:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:55,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:55,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:55,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:58:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:55,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:58:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:58:55,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:55,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32873341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:55,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:58:55,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 20:58:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549163209] [2022-11-18 20:58:55,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:55,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:58:55,581 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:58:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:55,596 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-18 20:58:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-18 20:58:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:55,603 INFO L225 Difference]: With dead ends: 45 [2022-11-18 20:58:55,604 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 20:58:55,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:58:55,638 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:55,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:58:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 20:58:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-18 20:58:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-18 20:58:55,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-11-18 20:58:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:55,646 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-18 20:58:55,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:58:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-18 20:58:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:58:55,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:55,651 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:55,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:55,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:55,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-11-18 20:58:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:55,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137073055] [2022-11-18 20:58:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:58:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 20:58:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 20:58:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:58:56,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137073055] [2022-11-18 20:58:56,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137073055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:56,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072349388] [2022-11-18 20:58:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:56,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:56,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:56,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:58:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:58:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:58:56,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:56,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072349388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:56,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:58:56,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-18 20:58:56,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604625882] [2022-11-18 20:58:56,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:56,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:56,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:56,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:56,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:58:56,330 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:58:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:56,347 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-18 20:58:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-18 20:58:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:56,349 INFO L225 Difference]: With dead ends: 41 [2022-11-18 20:58:56,349 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 20:58:56,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:58:56,351 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:56,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:58:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 20:58:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-18 20:58:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-18 20:58:56,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-11-18 20:58:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:56,359 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-18 20:58:56,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:58:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-18 20:58:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:58:56,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:56,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:56,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:58:56,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:56,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:56,568 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-11-18 20:58:56,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:56,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503678609] [2022-11-18 20:58:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:56,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-18 20:58:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-18 20:58:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-18 20:58:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:58:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:56,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503678609] [2022-11-18 20:58:56,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503678609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:56,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851200096] [2022-11-18 20:58:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:56,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:56,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:56,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:58:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:58:56,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:58:57,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:58:57,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851200096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:57,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:57,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-18 20:58:57,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737158673] [2022-11-18 20:58:57,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:57,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:58:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:58:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:58:57,084 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:58:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:57,177 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-18 20:58:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:58:57,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-18 20:58:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:57,181 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:58:57,181 INFO L226 Difference]: Without dead ends: 37 [2022-11-18 20:58:57,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:58:57,183 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:57,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:58:57,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-18 20:58:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-18 20:58:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-18 20:58:57,191 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-11-18 20:58:57,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:57,191 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-18 20:58:57,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:58:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-18 20:58:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 20:58:57,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:57,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:57,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:57,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:57,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-11-18 20:58:57,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:57,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982656811] [2022-11-18 20:58:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:57,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 20:58:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:57,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 20:58:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:57,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-18 20:58:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-18 20:58:57,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:57,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982656811] [2022-11-18 20:58:57,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982656811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:57,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122119344] [2022-11-18 20:58:57,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:57,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:57,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:57,728 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:57,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:58:57,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:58:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:58:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-18 20:58:57,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-18 20:58:58,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122119344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:58,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:58,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-18 20:58:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216641444] [2022-11-18 20:58:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:58:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:58:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:58:58,124 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:58:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:58,242 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-11-18 20:58:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:58:58,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-11-18 20:58:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:58,244 INFO L225 Difference]: With dead ends: 74 [2022-11-18 20:58:58,247 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:58:58,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:58:58,250 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:58,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:58:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:58:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-18 20:58:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-18 20:58:58,274 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-11-18 20:58:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:58,274 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-18 20:58:58,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:58:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-18 20:58:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:58:58,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:58,281 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:58,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:58,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:58,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-11-18 20:58:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:58,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597329220] [2022-11-18 20:58:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:58,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:58,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:58:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:58,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:58:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:59,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-18 20:58:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:58:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:59,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597329220] [2022-11-18 20:58:59,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597329220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126541208] [2022-11-18 20:58:59,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:58:59,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:59,068 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:59,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:58:59,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:58:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:58:59,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 20:58:59,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-18 20:58:59,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126541208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:59,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:59,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-18 20:58:59,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698905440] [2022-11-18 20:58:59,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:59,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:58:59,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:58:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:58:59,348 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:58:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:59,468 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-18 20:58:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:58:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-11-18 20:58:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:59,471 INFO L225 Difference]: With dead ends: 90 [2022-11-18 20:58:59,471 INFO L226 Difference]: Without dead ends: 64 [2022-11-18 20:58:59,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:58:59,473 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:59,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:58:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-18 20:58:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-18 20:58:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:58:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-18 20:58:59,485 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-11-18 20:58:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:59,485 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-18 20:58:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:58:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-18 20:58:59,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-18 20:58:59,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:59,488 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:59,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:58:59,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:59,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-11-18 20:58:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62292112] [2022-11-18 20:58:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:00,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 20:59:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:00,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-18 20:59:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:00,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-18 20:59:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-18 20:59:00,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62292112] [2022-11-18 20:59:00,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62292112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672225307] [2022-11-18 20:59:00,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:59:00,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:00,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:00,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:59:00,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:59:00,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:00,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:59:00,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-18 20:59:00,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-18 20:59:01,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672225307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:01,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:01,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-11-18 20:59:01,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226198469] [2022-11-18 20:59:01,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:01,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:59:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:59:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:59:01,049 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:59:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:01,162 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2022-11-18 20:59:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:59:01,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-11-18 20:59:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:01,167 INFO L225 Difference]: With dead ends: 119 [2022-11-18 20:59:01,168 INFO L226 Difference]: Without dead ends: 81 [2022-11-18 20:59:01,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:59:01,173 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:01,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:59:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-18 20:59:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-18 20:59:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:59:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-11-18 20:59:01,192 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 108 [2022-11-18 20:59:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:01,192 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-11-18 20:59:01,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:59:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-11-18 20:59:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-18 20:59:01,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:01,198 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:01,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:01,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:01,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2004558111, now seen corresponding path program 5 times [2022-11-18 20:59:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418007712] [2022-11-18 20:59:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:01,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:59:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:59:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:01,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-11-18 20:59:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-11-18 20:59:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418007712] [2022-11-18 20:59:01,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418007712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989125400] [2022-11-18 20:59:01,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:59:01,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:01,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:01,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:01,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:59:02,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-18 20:59:02,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:59:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2022-11-18 20:59:02,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-11-18 20:59:03,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989125400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:03,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:03,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-18 20:59:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157813326] [2022-11-18 20:59:03,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:03,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:59:03,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:03,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:59:03,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:59:03,208 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:59:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:03,301 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-11-18 20:59:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:59:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2022-11-18 20:59:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:03,307 INFO L225 Difference]: With dead ends: 142 [2022-11-18 20:59:03,307 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 20:59:03,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:59:03,310 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:03,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:59:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 20:59:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-18 20:59:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.17) internal successors, (117), 100 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:59:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2022-11-18 20:59:03,329 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 126 [2022-11-18 20:59:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:03,330 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2022-11-18 20:59:03,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:59:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2022-11-18 20:59:03,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-18 20:59:03,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:03,345 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:03,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:03,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:03,559 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash 848751647, now seen corresponding path program 6 times [2022-11-18 20:59:03,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:03,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997983150] [2022-11-18 20:59:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:04,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:59:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:04,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-18 20:59:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:04,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-18 20:59:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 1601 trivial. 0 not checked. [2022-11-18 20:59:04,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997983150] [2022-11-18 20:59:04,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997983150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143783143] [2022-11-18 20:59:04,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:59:04,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:04,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:04,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:04,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:59:05,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 20:59:05,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:59:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2022-11-18 20:59:05,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-11-18 20:59:05,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143783143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:05,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:05,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-11-18 20:59:05,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643710670] [2022-11-18 20:59:05,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:05,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:59:05,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:59:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:59:05,274 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:59:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:05,384 INFO L93 Difference]: Finished difference Result 179 states and 223 transitions. [2022-11-18 20:59:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:59:05,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2022-11-18 20:59:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:05,386 INFO L225 Difference]: With dead ends: 179 [2022-11-18 20:59:05,386 INFO L226 Difference]: Without dead ends: 118 [2022-11-18 20:59:05,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:59:05,388 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:05,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 236 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:59:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-18 20:59:05,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-11-18 20:59:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:59:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2022-11-18 20:59:05,401 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 198 [2022-11-18 20:59:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:05,401 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2022-11-18 20:59:05,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:59:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2022-11-18 20:59:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-18 20:59:05,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:05,406 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:05,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:05,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:59:05,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:05,613 INFO L85 PathProgramCache]: Analyzing trace with hash -217509715, now seen corresponding path program 7 times [2022-11-18 20:59:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:05,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531759400] [2022-11-18 20:59:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:59:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-18 20:59:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:07,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-18 20:59:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-11-18 20:59:07,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531759400] [2022-11-18 20:59:07,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531759400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857301505] [2022-11-18 20:59:07,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:59:07,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:07,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:07,106 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:07,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:59:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:59:07,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 1414 proven. 330 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2022-11-18 20:59:07,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 1808 trivial. 0 not checked. [2022-11-18 20:59:07,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857301505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:07,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:07,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2022-11-18 20:59:07,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274242953] [2022-11-18 20:59:07,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:07,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:59:07,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:07,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:59:07,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:59:07,890 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:59:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:07,981 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2022-11-18 20:59:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:59:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 215 [2022-11-18 20:59:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:07,986 INFO L225 Difference]: With dead ends: 203 [2022-11-18 20:59:07,987 INFO L226 Difference]: Without dead ends: 131 [2022-11-18 20:59:07,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 420 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:59:07,988 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:07,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 152 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:59:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-18 20:59:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-18 20:59:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:59:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-11-18 20:59:08,027 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 215 [2022-11-18 20:59:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:08,029 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-11-18 20:59:08,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:59:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-11-18 20:59:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-18 20:59:08,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:08,034 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:08,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:08,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:59:08,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2054059049, now seen corresponding path program 8 times [2022-11-18 20:59:08,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:08,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539006201] [2022-11-18 20:59:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:08,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:08,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:59:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 20:59:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-11-18 20:59:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-18 20:59:08,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:08,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539006201] [2022-11-18 20:59:08,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539006201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177522067] [2022-11-18 20:59:08,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:08,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:08,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:08,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:59:09,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:59:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:59:09,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 2490 proven. 36 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-11-18 20:59:09,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-18 20:59:09,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177522067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:09,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:09,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-18 20:59:09,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407768979] [2022-11-18 20:59:09,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:09,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:59:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:59:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:59:09,510 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:59:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:09,581 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2022-11-18 20:59:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:59:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 260 [2022-11-18 20:59:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:09,585 INFO L225 Difference]: With dead ends: 218 [2022-11-18 20:59:09,585 INFO L226 Difference]: Without dead ends: 147 [2022-11-18 20:59:09,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:59:09,587 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:09,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:59:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-18 20:59:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-18 20:59:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 142 states have internal predecessors, (165), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:59:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-11-18 20:59:09,605 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 260 [2022-11-18 20:59:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:09,605 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-11-18 20:59:09,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:59:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-11-18 20:59:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-18 20:59:09,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:09,611 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:09,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:09,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:59:09,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:09,819 INFO L85 PathProgramCache]: Analyzing trace with hash -371662137, now seen corresponding path program 9 times [2022-11-18 20:59:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:09,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519681571] [2022-11-18 20:59:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:11,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:59:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:11,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 20:59:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:11,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-11-18 20:59:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-18 20:59:11,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:11,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519681571] [2022-11-18 20:59:11,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519681571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:11,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299926319] [2022-11-18 20:59:11,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:59:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:11,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:11,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:59:17,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-18 20:59:17,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:59:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 2490 proven. 196 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2022-11-18 20:59:17,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6101 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2022-11-18 20:59:17,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299926319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:17,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:17,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-18 20:59:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201735058] [2022-11-18 20:59:17,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:59:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:59:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:59:17,999 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:59:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:18,084 INFO L93 Difference]: Finished difference Result 228 states and 277 transitions. [2022-11-18 20:59:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:59:18,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 276 [2022-11-18 20:59:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:18,088 INFO L225 Difference]: With dead ends: 228 [2022-11-18 20:59:18,088 INFO L226 Difference]: Without dead ends: 157 [2022-11-18 20:59:18,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 542 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:59:18,089 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:18,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:59:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-18 20:59:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-18 20:59:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.1513157894736843) internal successors, (175), 152 states have internal predecessors, (175), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:59:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2022-11-18 20:59:18,099 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 276 [2022-11-18 20:59:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:18,100 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2022-11-18 20:59:18,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:59:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2022-11-18 20:59:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-18 20:59:18,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:18,105 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:18,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:18,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:59:18,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2076360355, now seen corresponding path program 10 times [2022-11-18 20:59:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:18,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369902853] [2022-11-18 20:59:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:29,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:59:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:30,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 20:59:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:31,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-18 20:59:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 116 proven. 5524 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-11-18 20:59:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:59:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369902853] [2022-11-18 20:59:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369902853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:59:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172251226] [2022-11-18 20:59:34,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:59:34,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:34,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:59:34,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:59:34,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:59:35,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:59:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-18 20:59:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-11-18 20:59:37,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-11-18 20:59:41,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172251226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:41,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:59:41,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 30, 30] total 92 [2022-11-18 20:59:41,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131105370] [2022-11-18 20:59:41,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:41,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-18 20:59:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:59:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-18 20:59:41,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=8089, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 20:59:41,790 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-18 20:59:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:51,134 INFO L93 Difference]: Finished difference Result 902 states and 1308 transitions. [2022-11-18 20:59:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 20:59:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 286 [2022-11-18 20:59:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:51,154 INFO L225 Difference]: With dead ends: 902 [2022-11-18 20:59:51,154 INFO L226 Difference]: Without dead ends: 898 [2022-11-18 20:59:51,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 561 SyntacticMatches, 10 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=308, Invalid=8622, Unknown=0, NotChecked=0, Total=8930 [2022-11-18 20:59:51,160 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 233 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 10328 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 5281 SdHoareTripleChecker+Invalid, 10478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 10328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:51,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 5281 Invalid, 10478 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [150 Valid, 10328 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-18 20:59:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-18 20:59:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 584. [2022-11-18 20:59:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 576 states have (on average 1.2864583333333333) internal successors, (741), 577 states have internal predecessors, (741), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 20:59:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 755 transitions. [2022-11-18 20:59:51,296 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 755 transitions. Word has length 286 [2022-11-18 20:59:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:51,297 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 755 transitions. [2022-11-18 20:59:51,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 90 states have (on average 2.5444444444444443) internal successors, (229), 86 states have internal predecessors, (229), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-18 20:59:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 755 transitions. [2022-11-18 20:59:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-18 20:59:51,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:51,307 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:51,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:51,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:59:51,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:59:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1396301985, now seen corresponding path program 1 times [2022-11-18 20:59:51,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:59:51,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031347856] [2022-11-18 20:59:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:51,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:59:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:00,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:00:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 21:00:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:01,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-18 21:00:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1244 proven. 3639 refuted. 0 times theorem prover too weak. 1383 trivial. 0 not checked. [2022-11-18 21:00:03,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031347856] [2022-11-18 21:00:03,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031347856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:03,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756567390] [2022-11-18 21:00:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:03,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:03,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:03,729 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:03,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:00:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:04,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 165 conjunts are in the unsatisfiable core [2022-11-18 21:00:04,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:07,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2022-11-18 21:00:08,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-18 21:00:08,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-18 21:00:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 7 proven. 5322 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2022-11-18 21:00:12,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:17,711 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-18 21:00:17,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2022-11-18 21:00:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1301 proven. 3116 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2022-11-18 21:00:18,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756567390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:18,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:00:18,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 72, 32] total 124 [2022-11-18 21:00:18,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989375803] [2022-11-18 21:00:18,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-18 21:00:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-18 21:00:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=14788, Unknown=0, NotChecked=0, Total=15252 [2022-11-18 21:00:18,040 INFO L87 Difference]: Start difference. First operand 584 states and 755 transitions. Second operand has 124 states, 122 states have (on average 2.7704918032786887) internal successors, (338), 121 states have internal predecessors, (338), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-18 21:00:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:34,821 INFO L93 Difference]: Finished difference Result 2561 states and 3482 transitions. [2022-11-18 21:00:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-11-18 21:00:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 122 states have (on average 2.7704918032786887) internal successors, (338), 121 states have internal predecessors, (338), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 286 [2022-11-18 21:00:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:34,854 INFO L225 Difference]: With dead ends: 2561 [2022-11-18 21:00:34,854 INFO L226 Difference]: Without dead ends: 2509 [2022-11-18 21:00:34,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 565 SyntacticMatches, 9 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8789 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=1360, Invalid=38440, Unknown=0, NotChecked=0, Total=39800 [2022-11-18 21:00:34,877 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 582 mSDsluCounter, 7748 mSDsCounter, 0 mSdLazyCounter, 6013 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 7891 SdHoareTripleChecker+Invalid, 12262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 6013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6199 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:34,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 7891 Invalid, 12262 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 6013 Invalid, 0 Unknown, 6199 Unchecked, 5.1s Time] [2022-11-18 21:00:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2022-11-18 21:00:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2432. [2022-11-18 21:00:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2410 states have (on average 1.342323651452282) internal successors, (3235), 2419 states have internal predecessors, (3235), 9 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (61), 9 states have call predecessors, (61), 9 states have call successors, (61) [2022-11-18 21:00:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 3305 transitions. [2022-11-18 21:00:35,178 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 3305 transitions. Word has length 286 [2022-11-18 21:00:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:35,180 INFO L495 AbstractCegarLoop]: Abstraction has 2432 states and 3305 transitions. [2022-11-18 21:00:35,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 122 states have (on average 2.7704918032786887) internal successors, (338), 121 states have internal predecessors, (338), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-18 21:00:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 3305 transitions. [2022-11-18 21:00:35,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-18 21:00:35,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:35,236 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:35,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:35,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:35,447 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:00:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1818194917, now seen corresponding path program 2 times [2022-11-18 21:00:35,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:00:35,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319497833] [2022-11-18 21:00:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:35,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:00:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:55,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 21:00:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:55,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-18 21:00:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-11-18 21:00:56,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:56,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319497833] [2022-11-18 21:00:56,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319497833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:56,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298091956] [2022-11-18 21:00:56,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:00:56,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:56,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:56,804 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:56,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:00:57,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:00:57,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-18 21:00:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:57,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 21:00:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:58,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-18 21:00:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:00:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:59,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:00:59,870 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 21:00:59,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-11-18 21:01:00,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:01:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:00,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:01:00,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2022-11-18 21:01:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 240 proven. 5965 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 21:01:03,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2620 proven. 2651 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2022-11-18 21:01:35,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298091956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:35,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:01:35,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 89, 84] total 175 [2022-11-18 21:01:35,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158585164] [2022-11-18 21:01:35,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:35,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2022-11-18 21:01:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2022-11-18 21:01:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=29703, Unknown=0, NotChecked=0, Total=30450 [2022-11-18 21:01:35,363 INFO L87 Difference]: Start difference. First operand 2432 states and 3305 transitions. Second operand has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 21:01:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:56,992 INFO L93 Difference]: Finished difference Result 8528 states and 11652 transitions. [2022-11-18 21:01:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-18 21:01:56,994 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2022-11-18 21:01:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:57,026 INFO L225 Difference]: With dead ends: 8528 [2022-11-18 21:01:57,027 INFO L226 Difference]: Without dead ends: 6123 [2022-11-18 21:01:57,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 534 SyntacticMatches, 10 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13456 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=2046, Invalid=45260, Unknown=0, NotChecked=0, Total=47306 [2022-11-18 21:01:57,124 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 455 mSDsluCounter, 12301 mSDsCounter, 0 mSdLazyCounter, 12594 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 12440 SdHoareTripleChecker+Invalid, 20817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 12594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8142 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:57,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 12440 Invalid, 20817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [81 Valid, 12594 Invalid, 0 Unknown, 8142 Unchecked, 11.1s Time] [2022-11-18 21:01:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6123 states. [2022-11-18 21:01:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6123 to 5171. [2022-11-18 21:01:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5132 states have (on average 1.3265783320342945) internal successors, (6808), 5146 states have internal predecessors, (6808), 17 states have call successors, (17), 7 states have call predecessors, (17), 21 states have return successors, (120), 17 states have call predecessors, (120), 17 states have call successors, (120) [2022-11-18 21:01:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 6945 transitions. [2022-11-18 21:01:57,885 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 6945 transitions. Word has length 286 [2022-11-18 21:01:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:57,886 INFO L495 AbstractCegarLoop]: Abstraction has 5171 states and 6945 transitions. [2022-11-18 21:01:57,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 2.3085714285714287) internal successors, (404), 173 states have internal predecessors, (404), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 21:01:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 6945 transitions. [2022-11-18 21:01:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-18 21:01:57,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:57,929 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:57,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:58,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:58,144 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:01:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash 938743263, now seen corresponding path program 3 times [2022-11-18 21:01:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:58,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771145515] [2022-11-18 21:01:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:02:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 21:02:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:14,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-18 21:02:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4373 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2022-11-18 21:02:15,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:15,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771145515] [2022-11-18 21:02:15,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771145515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:15,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757044677] [2022-11-18 21:02:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:02:15,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:15,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:15,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:15,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:02:36,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2022-11-18 21:02:36,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:02:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 238 conjunts are in the unsatisfiable core [2022-11-18 21:02:36,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:36,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 21:02:36,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 21:02:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:37,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-18 21:02:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-18 21:02:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:38,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-18 21:02:38,998 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:38,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2022-11-18 21:02:39,297 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:39,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-18 21:02:39,488 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:39,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-18 21:02:39,544 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:39,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-18 21:02:39,729 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:39,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-18 21:02:39,895 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:39,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-18 21:02:40,050 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-18 21:02:40,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-11-18 21:02:40,220 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-18 21:02:40,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2022-11-18 21:02:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:40,625 INFO L321 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2022-11-18 21:02:40,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 69 [2022-11-18 21:02:41,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-18 21:02:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2268 proven. 2793 refuted. 0 times theorem prover too weak. 1205 trivial. 0 not checked. [2022-11-18 21:02:43,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757044677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:43,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:43,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 58] total 105 [2022-11-18 21:02:43,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209338481] [2022-11-18 21:02:43,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:43,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-18 21:02:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-18 21:02:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=10640, Unknown=0, NotChecked=0, Total=11130 [2022-11-18 21:02:43,642 INFO L87 Difference]: Start difference. First operand 5171 states and 6945 transitions. Second operand has 105 states, 105 states have (on average 2.3333333333333335) internal successors, (245), 104 states have internal predecessors, (245), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 21:09:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:36,109 INFO L93 Difference]: Finished difference Result 41698 states and 56179 transitions. [2022-11-18 21:09:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 732 states. [2022-11-18 21:09:36,110 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.3333333333333335) internal successors, (245), 104 states have internal predecessors, (245), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 286 [2022-11-18 21:09:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:36,296 INFO L225 Difference]: With dead ends: 41698 [2022-11-18 21:09:36,296 INFO L226 Difference]: Without dead ends: 34249 [2022-11-18 21:09:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 405 SyntacticMatches, 19 SemanticMatches, 786 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 264126 ImplicationChecksByTransitivity, 408.2s TimeCoverageRelationStatistics Valid=12972, Invalid=606882, Unknown=302, NotChecked=0, Total=620156 [2022-11-18 21:09:36,471 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 554 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 10012 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 21054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 10012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10868 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:36,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 535 Invalid, 21054 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [174 Valid, 10012 Invalid, 0 Unknown, 10868 Unchecked, 7.3s Time] [2022-11-18 21:09:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34249 states. [2022-11-18 21:09:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34249 to 15592. [2022-11-18 21:09:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15592 states, 15502 states have (on average 1.3653722100374146) internal successors, (21166), 15543 states have internal predecessors, (21166), 33 states have call successors, (33), 15 states have call predecessors, (33), 56 states have return successors, (520), 33 states have call predecessors, (520), 33 states have call successors, (520) [2022-11-18 21:09:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15592 states to 15592 states and 21719 transitions. [2022-11-18 21:09:40,188 INFO L78 Accepts]: Start accepts. Automaton has 15592 states and 21719 transitions. Word has length 286 [2022-11-18 21:09:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:40,189 INFO L495 AbstractCegarLoop]: Abstraction has 15592 states and 21719 transitions. [2022-11-18 21:09:40,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.3333333333333335) internal successors, (245), 104 states have internal predecessors, (245), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 21:09:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 15592 states and 21719 transitions. [2022-11-18 21:09:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-18 21:09:40,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:40,303 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:40,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:40,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 21:09:40,519 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash 224462235, now seen corresponding path program 4 times [2022-11-18 21:09:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:40,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547501722] [2022-11-18 21:09:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:40,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:53,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:09:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:55,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 21:09:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:55,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-11-18 21:09:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 1246 proven. 4372 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-11-18 21:09:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547501722] [2022-11-18 21:09:56,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547501722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619207480] [2022-11-18 21:09:56,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:09:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:56,372 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:56,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 21:09:56,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:09:56,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 213 conjunts are in the unsatisfiable core [2022-11-18 21:09:56,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:09:57,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-18 21:09:57,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:57,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:57,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:57,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-18 21:09:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:09:58,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:09:58,750 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 21:09:58,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-11-18 21:09:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:09:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:09:59,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:09:59,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 40 [2022-11-18 21:09:59,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-18 21:09:59,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-18 21:10:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2539 proven. 3110 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2022-11-18 21:10:02,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:25,768 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-18 21:10:25,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2022-11-18 21:10:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6266 backedges. 2673 proven. 2578 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2022-11-18 21:10:28,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619207480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:28,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:10:28,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 84, 80] total 173 [2022-11-18 21:10:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285133265] [2022-11-18 21:10:28,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-11-18 21:10:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-11-18 21:10:28,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=28813, Unknown=0, NotChecked=0, Total=29756 [2022-11-18 21:10:28,753 INFO L87 Difference]: Start difference. First operand 15592 states and 21719 transitions. Second operand has 173 states, 173 states have (on average 2.2658959537572256) internal successors, (392), 171 states have internal predecessors, (392), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 21:11:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:51,235 INFO L93 Difference]: Finished difference Result 51651 states and 73063 transitions. [2022-11-18 21:11:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-18 21:11:51,237 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.2658959537572256) internal successors, (392), 171 states have internal predecessors, (392), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 286 [2022-11-18 21:11:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:51,410 INFO L225 Difference]: With dead ends: 51651 [2022-11-18 21:11:51,411 INFO L226 Difference]: Without dead ends: 33386 [2022-11-18 21:11:51,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 537 SyntacticMatches, 17 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21673 ImplicationChecksByTransitivity, 99.8s TimeCoverageRelationStatistics Valid=3360, Invalid=67659, Unknown=3, NotChecked=0, Total=71022 [2022-11-18 21:11:51,506 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 298 mSDsluCounter, 9209 mSDsCounter, 0 mSdLazyCounter, 10337 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 9333 SdHoareTripleChecker+Invalid, 19016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 10337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8621 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:51,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 9333 Invalid, 19016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [58 Valid, 10337 Invalid, 0 Unknown, 8621 Unchecked, 7.5s Time] [2022-11-18 21:11:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33386 states. [2022-11-18 21:11:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33386 to 31922. [2022-11-18 21:11:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31922 states, 31746 states have (on average 1.3563283563283564) internal successors, (43058), 31825 states have internal predecessors, (43058), 65 states have call successors, (65), 31 states have call predecessors, (65), 110 states have return successors, (1516), 65 states have call predecessors, (1516), 65 states have call successors, (1516) [2022-11-18 21:11:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31922 states to 31922 states and 44639 transitions. [2022-11-18 21:11:57,031 INFO L78 Accepts]: Start accepts. Automaton has 31922 states and 44639 transitions. Word has length 286 [2022-11-18 21:11:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:57,032 INFO L495 AbstractCegarLoop]: Abstraction has 31922 states and 44639 transitions. [2022-11-18 21:11:57,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.2658959537572256) internal successors, (392), 171 states have internal predecessors, (392), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 21:11:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 31922 states and 44639 transitions. [2022-11-18 21:11:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-18 21:11:57,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:57,213 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:57,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:57,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41ff888d-4060-4df2-83bb-cd0ead34c0bb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:11:57,424 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1653658529, now seen corresponding path program 5 times [2022-11-18 21:11:57,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:57,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806807515] [2022-11-18 21:11:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:57,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:10,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 21:12:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:10,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-18 21:12:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat