./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a --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 a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a --- 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-b5237d8 [2022-11-21 08:54:48,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 08:54:48,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 08:54:48,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 08:54:48,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 08:54:48,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 08:54:48,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 08:54:48,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 08:54:48,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 08:54:48,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 08:54:48,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 08:54:48,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 08:54:48,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 08:54:48,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 08:54:48,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 08:54:48,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 08:54:48,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 08:54:48,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 08:54:48,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 08:54:48,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 08:54:48,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 08:54:48,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 08:54:48,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 08:54:48,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 08:54:48,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 08:54:48,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 08:54:48,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 08:54:48,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 08:54:48,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 08:54:48,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 08:54:48,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 08:54:48,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 08:54:48,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 08:54:48,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 08:54:48,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 08:54:48,737 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 08:54:48,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 08:54:48,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 08:54:48,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 08:54:48,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 08:54:48,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 08:54:48,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 08:54:48,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 08:54:48,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 08:54:48,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 08:54:48,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 08:54:48,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 08:54:48,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 08:54:48,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 08:54:48,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 08:54:48,789 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 08:54:48,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 08:54:48,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 08:54:48,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 08:54:48,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 08:54:48,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 08:54:48,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 08:54:48,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 08:54:48,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 08:54:48,791 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 08:54:48,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 08:54:48,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 08:54:48,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 08:54:48,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 08:54:48,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 08:54:48,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 08:54:48,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 08:54:48,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 08:54:48,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 08:54:48,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 08:54:48,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 08:54:48,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 08:54:48,794 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 08:54:48,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 08:54:48,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 08:54:48,795 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_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a [2022-11-21 08:54:49,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 08:54:49,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 08:54:49,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 08:54:49,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 08:54:49,091 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 08:54:49,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-11-21 08:54:52,129 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 08:54:52,355 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 08:54:52,355 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-11-21 08:54:52,385 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/data/58ce043ce/e3f2085c3acf4b43b9ba6820dbf14d03/FLAGdc0372dfb [2022-11-21 08:54:52,399 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/data/58ce043ce/e3f2085c3acf4b43b9ba6820dbf14d03 [2022-11-21 08:54:52,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 08:54:52,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 08:54:52,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 08:54:52,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 08:54:52,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 08:54:52,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:54:52" (1/1) ... [2022-11-21 08:54:52,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29e7f4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:52, skipping insertion in model container [2022-11-21 08:54:52,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:54:52" (1/1) ... [2022-11-21 08:54:52,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 08:54:52,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 08:54:52,612 WARN L237 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_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2022-11-21 08:54:52,692 WARN L237 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_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2022-11-21 08:54:52,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 08:54:52,866 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 08:54:52,882 WARN L237 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_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2022-11-21 08:54:52,915 WARN L237 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_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2022-11-21 08:54:53,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 08:54:53,038 INFO L208 MainTranslator]: Completed translation [2022-11-21 08:54:53,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53 WrapperNode [2022-11-21 08:54:53,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 08:54:53,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 08:54:53,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 08:54:53,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 08:54:53,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,117 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1045 [2022-11-21 08:54:53,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 08:54:53,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 08:54:53,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 08:54:53,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 08:54:53,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 08:54:53,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 08:54:53,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 08:54:53,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 08:54:53,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (1/1) ... [2022-11-21 08:54:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 08:54:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 08:54:53,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 08:54:53,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 08:54:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 08:54:53,302 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-21 08:54:53,303 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-21 08:54:53,304 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-21 08:54:53,305 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-21 08:54:53,305 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-21 08:54:53,305 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-21 08:54:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-21 08:54:53,306 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-21 08:54:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-21 08:54:53,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-21 08:54:53,306 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-21 08:54:53,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-21 08:54:53,307 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-21 08:54:53,307 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-21 08:54:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-21 08:54:53,308 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-21 08:54:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-21 08:54:53,308 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-21 08:54:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-21 08:54:53,308 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-21 08:54:53,308 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-21 08:54:53,309 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-21 08:54:53,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 08:54:53,309 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-21 08:54:53,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-21 08:54:53,309 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-21 08:54:53,309 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-21 08:54:53,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 08:54:53,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 08:54:53,310 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-21 08:54:53,310 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-21 08:54:53,311 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-21 08:54:53,311 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-21 08:54:53,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 08:54:53,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 08:54:54,586 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 08:54:54,598 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 08:54:54,598 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-21 08:54:54,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:54:54 BoogieIcfgContainer [2022-11-21 08:54:54,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 08:54:54,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 08:54:54,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 08:54:54,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 08:54:54,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:54:52" (1/3) ... [2022-11-21 08:54:54,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6410088b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:54:54, skipping insertion in model container [2022-11-21 08:54:54,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:54:53" (2/3) ... [2022-11-21 08:54:54,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6410088b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:54:54, skipping insertion in model container [2022-11-21 08:54:54,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:54:54" (3/3) ... [2022-11-21 08:54:54,610 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2022-11-21 08:54:54,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 08:54:54,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 08:54:54,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 08:54:54,696 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;@74b9506c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 08:54:54,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 08:54:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 491 states, 431 states have (on average 1.6450116009280742) internal successors, (709), 439 states have internal predecessors, (709), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-21 08:54:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:54:54,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:54:54,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:54:54,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:54:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:54:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1117056757, now seen corresponding path program 1 times [2022-11-21 08:54:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:54:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724411410] [2022-11-21 08:54:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:54:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:54:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:54:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:54:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:54:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:54:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:54:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:54:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:54:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:54:55,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:54:55,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724411410] [2022-11-21 08:54:55,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724411410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:54:55,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:54:55,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 08:54:55,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479518554] [2022-11-21 08:54:55,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:54:55,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 08:54:55,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:54:55,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 08:54:55,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 08:54:55,379 INFO L87 Difference]: Start difference. First operand has 491 states, 431 states have (on average 1.6450116009280742) internal successors, (709), 439 states have internal predecessors, (709), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:54:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:54:57,096 INFO L93 Difference]: Finished difference Result 1088 states and 1744 transitions. [2022-11-21 08:54:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 08:54:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 08:54:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:54:57,127 INFO L225 Difference]: With dead ends: 1088 [2022-11-21 08:54:57,128 INFO L226 Difference]: Without dead ends: 615 [2022-11-21 08:54:57,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-21 08:54:57,140 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 1225 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 08:54:57,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 2191 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 08:54:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-21 08:54:57,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 576. [2022-11-21 08:54:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 499 states have (on average 1.531062124248497) internal successors, (764), 506 states have internal predecessors, (764), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2022-11-21 08:54:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 871 transitions. [2022-11-21 08:54:57,280 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 871 transitions. Word has length 65 [2022-11-21 08:54:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:54:57,280 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 871 transitions. [2022-11-21 08:54:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:54:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 871 transitions. [2022-11-21 08:54:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:54:57,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:54:57,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:54:57,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 08:54:57,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:54:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:54:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -713270806, now seen corresponding path program 1 times [2022-11-21 08:54:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:54:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688779046] [2022-11-21 08:54:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:54:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:54:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:54:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:54:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:54:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:54:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:54:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:54:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:54:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:54:57,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:54:57,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688779046] [2022-11-21 08:54:57,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688779046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:54:57,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:54:57,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 08:54:57,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714968528] [2022-11-21 08:54:57,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:54:57,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 08:54:57,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:54:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 08:54:57,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 08:54:57,579 INFO L87 Difference]: Start difference. First operand 576 states and 871 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:54:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:54:59,133 INFO L93 Difference]: Finished difference Result 923 states and 1348 transitions. [2022-11-21 08:54:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 08:54:59,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 08:54:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:54:59,140 INFO L225 Difference]: With dead ends: 923 [2022-11-21 08:54:59,140 INFO L226 Difference]: Without dead ends: 746 [2022-11-21 08:54:59,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-21 08:54:59,145 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 1867 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1898 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 08:54:59,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1898 Valid, 2032 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 08:54:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-21 08:54:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 672. [2022-11-21 08:54:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 575 states have (on average 1.5095652173913043) internal successors, (868), 584 states have internal predecessors, (868), 64 states have call successors, (64), 29 states have call predecessors, (64), 31 states have return successors, (73), 62 states have call predecessors, (73), 60 states have call successors, (73) [2022-11-21 08:54:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1005 transitions. [2022-11-21 08:54:59,244 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1005 transitions. Word has length 65 [2022-11-21 08:54:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:54:59,245 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1005 transitions. [2022-11-21 08:54:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:54:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1005 transitions. [2022-11-21 08:54:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:54:59,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:54:59,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:54:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 08:54:59,248 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:54:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:54:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1553110380, now seen corresponding path program 1 times [2022-11-21 08:54:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:54:59,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127196382] [2022-11-21 08:54:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:54:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:54:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:54:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:54:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:54:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:54:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:54:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:54:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:54:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:54:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:54:59,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:54:59,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127196382] [2022-11-21 08:54:59,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127196382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:54:59,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:54:59,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 08:54:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712340997] [2022-11-21 08:54:59,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:54:59,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 08:54:59,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:54:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 08:54:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 08:54:59,552 INFO L87 Difference]: Start difference. First operand 672 states and 1005 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:01,154 INFO L93 Difference]: Finished difference Result 973 states and 1419 transitions. [2022-11-21 08:55:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 08:55:01,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-11-21 08:55:01,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:01,164 INFO L225 Difference]: With dead ends: 973 [2022-11-21 08:55:01,165 INFO L226 Difference]: Without dead ends: 706 [2022-11-21 08:55:01,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 08:55:01,175 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 978 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:01,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 2593 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 08:55:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-11-21 08:55:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 677. [2022-11-21 08:55:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 579 states have (on average 1.5025906735751295) internal successors, (870), 588 states have internal predecessors, (870), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (74), 63 states have call predecessors, (74), 60 states have call successors, (74) [2022-11-21 08:55:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1008 transitions. [2022-11-21 08:55:01,255 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1008 transitions. Word has length 65 [2022-11-21 08:55:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:01,255 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1008 transitions. [2022-11-21 08:55:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:01,256 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1008 transitions. [2022-11-21 08:55:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:55:01,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:01,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:01,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 08:55:01,258 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash 523751082, now seen corresponding path program 1 times [2022-11-21 08:55:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161904073] [2022-11-21 08:55:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:01,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:01,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:01,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161904073] [2022-11-21 08:55:01,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161904073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:01,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:01,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 08:55:01,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814835210] [2022-11-21 08:55:01,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 08:55:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 08:55:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-21 08:55:01,411 INFO L87 Difference]: Start difference. First operand 677 states and 1008 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 08:55:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:03,877 INFO L93 Difference]: Finished difference Result 1999 states and 2804 transitions. [2022-11-21 08:55:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 08:55:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2022-11-21 08:55:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:03,887 INFO L225 Difference]: With dead ends: 1999 [2022-11-21 08:55:03,887 INFO L226 Difference]: Without dead ends: 1709 [2022-11-21 08:55:03,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 08:55:03,898 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 3684 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3698 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:03,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3698 Valid, 2671 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 08:55:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-11-21 08:55:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1578. [2022-11-21 08:55:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1294 states have (on average 1.3979907264296754) internal successors, (1809), 1318 states have internal predecessors, (1809), 152 states have call successors, (152), 112 states have call predecessors, (152), 130 states have return successors, (188), 150 states have call predecessors, (188), 148 states have call successors, (188) [2022-11-21 08:55:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2149 transitions. [2022-11-21 08:55:04,061 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2149 transitions. Word has length 65 [2022-11-21 08:55:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:04,062 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 2149 transitions. [2022-11-21 08:55:04,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-21 08:55:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2149 transitions. [2022-11-21 08:55:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:55:04,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:04,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:04,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 08:55:04,065 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:04,065 INFO L85 PathProgramCache]: Analyzing trace with hash 116960512, now seen corresponding path program 1 times [2022-11-21 08:55:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:04,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436088900] [2022-11-21 08:55:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:04,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:04,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:04,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436088900] [2022-11-21 08:55:04,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436088900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:04,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:04,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 08:55:04,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658466143] [2022-11-21 08:55:04,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:04,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 08:55:04,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 08:55:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-21 08:55:04,262 INFO L87 Difference]: Start difference. First operand 1578 states and 2149 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:05,897 INFO L93 Difference]: Finished difference Result 2869 states and 3822 transitions. [2022-11-21 08:55:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 08:55:05,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-11-21 08:55:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:05,905 INFO L225 Difference]: With dead ends: 2869 [2022-11-21 08:55:05,905 INFO L226 Difference]: Without dead ends: 1684 [2022-11-21 08:55:05,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-21 08:55:05,908 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 660 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 2925 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:05,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 2925 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 08:55:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2022-11-21 08:55:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1608. [2022-11-21 08:55:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1318 states have (on average 1.3846737481031866) internal successors, (1825), 1342 states have internal predecessors, (1825), 152 states have call successors, (152), 112 states have call predecessors, (152), 136 states have return successors, (194), 156 states have call predecessors, (194), 148 states have call successors, (194) [2022-11-21 08:55:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2171 transitions. [2022-11-21 08:55:06,016 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2171 transitions. Word has length 65 [2022-11-21 08:55:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:06,016 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2171 transitions. [2022-11-21 08:55:06,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2171 transitions. [2022-11-21 08:55:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:55:06,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:06,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:06,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 08:55:06,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1503163906, now seen corresponding path program 1 times [2022-11-21 08:55:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:06,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56834525] [2022-11-21 08:55:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:06,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:06,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:06,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56834525] [2022-11-21 08:55:06,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56834525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:06,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:06,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 08:55:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383319116] [2022-11-21 08:55:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:06,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 08:55:06,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 08:55:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 08:55:06,231 INFO L87 Difference]: Start difference. First operand 1608 states and 2171 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:55:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:07,695 INFO L93 Difference]: Finished difference Result 2863 states and 3718 transitions. [2022-11-21 08:55:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 08:55:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 08:55:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:07,704 INFO L225 Difference]: With dead ends: 2863 [2022-11-21 08:55:07,705 INFO L226 Difference]: Without dead ends: 1871 [2022-11-21 08:55:07,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-21 08:55:07,709 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1452 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:07,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 2155 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 08:55:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-11-21 08:55:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1550. [2022-11-21 08:55:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1276 states have (on average 1.3824451410658307) internal successors, (1764), 1295 states have internal predecessors, (1764), 146 states have call successors, (146), 107 states have call predecessors, (146), 126 states have return successors, (179), 149 states have call predecessors, (179), 142 states have call successors, (179) [2022-11-21 08:55:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2089 transitions. [2022-11-21 08:55:07,841 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2089 transitions. Word has length 65 [2022-11-21 08:55:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:07,842 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2089 transitions. [2022-11-21 08:55:07,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:55:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2089 transitions. [2022-11-21 08:55:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 08:55:07,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:07,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:07,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 08:55:07,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1369150400, now seen corresponding path program 1 times [2022-11-21 08:55:07,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:07,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396877209] [2022-11-21 08:55:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:07,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396877209] [2022-11-21 08:55:07,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396877209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:07,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:07,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:07,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892124980] [2022-11-21 08:55:07,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:07,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:07,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:07,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:07,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:07,950 INFO L87 Difference]: Start difference. First operand 1550 states and 2089 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:55:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:09,045 INFO L93 Difference]: Finished difference Result 3889 states and 5050 transitions. [2022-11-21 08:55:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 08:55:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-21 08:55:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:09,057 INFO L225 Difference]: With dead ends: 3889 [2022-11-21 08:55:09,058 INFO L226 Difference]: Without dead ends: 2733 [2022-11-21 08:55:09,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-21 08:55:09,062 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1420 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:09,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1453 Valid, 1788 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 08:55:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-11-21 08:55:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2613. [2022-11-21 08:55:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2096 states have (on average 1.3148854961832062) internal successors, (2756), 2132 states have internal predecessors, (2756), 265 states have call successors, (265), 206 states have call predecessors, (265), 250 states have return successors, (370), 277 states have call predecessors, (370), 261 states have call successors, (370) [2022-11-21 08:55:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3391 transitions. [2022-11-21 08:55:09,239 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3391 transitions. Word has length 65 [2022-11-21 08:55:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:09,241 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 3391 transitions. [2022-11-21 08:55:09,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-21 08:55:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3391 transitions. [2022-11-21 08:55:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-21 08:55:09,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:09,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:09,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 08:55:09,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash 176493782, now seen corresponding path program 1 times [2022-11-21 08:55:09,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825595785] [2022-11-21 08:55:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:09,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825595785] [2022-11-21 08:55:09,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825595785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:09,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:09,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 08:55:09,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097926406] [2022-11-21 08:55:09,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:09,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 08:55:09,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 08:55:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 08:55:09,347 INFO L87 Difference]: Start difference. First operand 2613 states and 3391 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:10,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:10,471 INFO L93 Difference]: Finished difference Result 5929 states and 7536 transitions. [2022-11-21 08:55:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 08:55:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-11-21 08:55:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:10,488 INFO L225 Difference]: With dead ends: 5929 [2022-11-21 08:55:10,489 INFO L226 Difference]: Without dead ends: 3715 [2022-11-21 08:55:10,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:55:10,496 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1196 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:10,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 1440 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 08:55:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2022-11-21 08:55:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3447. [2022-11-21 08:55:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2744 states have (on average 1.2940962099125364) internal successors, (3551), 2785 states have internal predecessors, (3551), 357 states have call successors, (357), 286 states have call predecessors, (357), 344 states have return successors, (484), 378 states have call predecessors, (484), 353 states have call successors, (484) [2022-11-21 08:55:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4392 transitions. [2022-11-21 08:55:10,777 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4392 transitions. Word has length 66 [2022-11-21 08:55:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:10,778 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 4392 transitions. [2022-11-21 08:55:10,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4392 transitions. [2022-11-21 08:55:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-21 08:55:10,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:10,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:10,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 08:55:10,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:10,781 INFO L85 PathProgramCache]: Analyzing trace with hash 138145877, now seen corresponding path program 1 times [2022-11-21 08:55:10,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:10,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916434900] [2022-11-21 08:55:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:10,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:10,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:10,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916434900] [2022-11-21 08:55:10,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916434900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:10,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:10,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 08:55:10,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845444254] [2022-11-21 08:55:10,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:10,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 08:55:10,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:10,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 08:55:10,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 08:55:10,860 INFO L87 Difference]: Start difference. First operand 3447 states and 4392 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:11,863 INFO L93 Difference]: Finished difference Result 7319 states and 9166 transitions. [2022-11-21 08:55:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 08:55:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-21 08:55:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:11,881 INFO L225 Difference]: With dead ends: 7319 [2022-11-21 08:55:11,882 INFO L226 Difference]: Without dead ends: 4269 [2022-11-21 08:55:11,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:55:11,889 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 1742 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:11,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1776 Valid, 1167 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 08:55:11,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2022-11-21 08:55:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4001. [2022-11-21 08:55:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 3184 states have (on average 1.2848618090452262) internal successors, (4091), 3229 states have internal predecessors, (4091), 413 states have call successors, (413), 336 states have call predecessors, (413), 402 states have return successors, (557), 438 states have call predecessors, (557), 409 states have call successors, (557) [2022-11-21 08:55:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 5061 transitions. [2022-11-21 08:55:12,241 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 5061 transitions. Word has length 72 [2022-11-21 08:55:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:12,242 INFO L495 AbstractCegarLoop]: Abstraction has 4001 states and 5061 transitions. [2022-11-21 08:55:12,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-21 08:55:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 5061 transitions. [2022-11-21 08:55:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-21 08:55:12,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:12,244 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:12,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 08:55:12,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:12,245 INFO L85 PathProgramCache]: Analyzing trace with hash -529402658, now seen corresponding path program 1 times [2022-11-21 08:55:12,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:12,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066401087] [2022-11-21 08:55:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:12,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:12,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066401087] [2022-11-21 08:55:12,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066401087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:12,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:12,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:12,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889244267] [2022-11-21 08:55:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:12,347 INFO L87 Difference]: Start difference. First operand 4001 states and 5061 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 08:55:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:13,578 INFO L93 Difference]: Finished difference Result 5087 states and 6356 transitions. [2022-11-21 08:55:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 08:55:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-11-21 08:55:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:13,600 INFO L225 Difference]: With dead ends: 5087 [2022-11-21 08:55:13,600 INFO L226 Difference]: Without dead ends: 5084 [2022-11-21 08:55:13,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-21 08:55:13,604 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 2442 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:13,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 1143 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 08:55:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2022-11-21 08:55:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 4463. [2022-11-21 08:55:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3539 states have (on average 1.2735235942356598) internal successors, (4507), 3587 states have internal predecessors, (4507), 463 states have call successors, (463), 380 states have call predecessors, (463), 459 states have return successors, (634), 498 states have call predecessors, (634), 460 states have call successors, (634) [2022-11-21 08:55:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 5604 transitions. [2022-11-21 08:55:14,007 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 5604 transitions. Word has length 73 [2022-11-21 08:55:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:14,008 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 5604 transitions. [2022-11-21 08:55:14,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 08:55:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 5604 transitions. [2022-11-21 08:55:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-21 08:55:14,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:14,010 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:14,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 08:55:14,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash 766925247, now seen corresponding path program 1 times [2022-11-21 08:55:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:14,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830822815] [2022-11-21 08:55:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:14,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830822815] [2022-11-21 08:55:14,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830822815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 08:55:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232809355] [2022-11-21 08:55:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 08:55:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 08:55:14,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 08:55:14,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 08:55:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:14,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 08:55:14,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 08:55:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:14,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 08:55:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232809355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 08:55:15,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 08:55:15,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2022-11-21 08:55:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300507162] [2022-11-21 08:55:15,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 08:55:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 08:55:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 08:55:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-21 08:55:15,003 INFO L87 Difference]: Start difference. First operand 4463 states and 5604 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-21 08:55:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:17,946 INFO L93 Difference]: Finished difference Result 8781 states and 10813 transitions. [2022-11-21 08:55:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-21 08:55:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2022-11-21 08:55:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:17,995 INFO L225 Difference]: With dead ends: 8781 [2022-11-21 08:55:17,995 INFO L226 Difference]: Without dead ends: 8778 [2022-11-21 08:55:17,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-11-21 08:55:18,000 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1909 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1973 SdHoareTripleChecker+Valid, 2941 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:18,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1973 Valid, 2941 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-21 08:55:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2022-11-21 08:55:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 7880. [2022-11-21 08:55:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6214 states have (on average 1.2536208561313165) internal successors, (7790), 6297 states have internal predecessors, (7790), 822 states have call successors, (822), 694 states have call predecessors, (822), 842 states have return successors, (1135), 891 states have call predecessors, (1135), 819 states have call successors, (1135) [2022-11-21 08:55:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 9747 transitions. [2022-11-21 08:55:18,851 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 9747 transitions. Word has length 74 [2022-11-21 08:55:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:18,851 INFO L495 AbstractCegarLoop]: Abstraction has 7880 states and 9747 transitions. [2022-11-21 08:55:18,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-21 08:55:18,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 9747 transitions. [2022-11-21 08:55:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 08:55:18,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:18,854 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:18,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 08:55:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 08:55:19,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:19,061 INFO L85 PathProgramCache]: Analyzing trace with hash 889380766, now seen corresponding path program 2 times [2022-11-21 08:55:19,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:19,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127384509] [2022-11-21 08:55:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:19,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:19,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127384509] [2022-11-21 08:55:19,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127384509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:19,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:19,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 08:55:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074169137] [2022-11-21 08:55:19,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 08:55:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 08:55:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 08:55:19,142 INFO L87 Difference]: Start difference. First operand 7880 states and 9747 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 08:55:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:20,412 INFO L93 Difference]: Finished difference Result 10474 states and 12956 transitions. [2022-11-21 08:55:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 08:55:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-11-21 08:55:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:20,440 INFO L225 Difference]: With dead ends: 10474 [2022-11-21 08:55:20,440 INFO L226 Difference]: Without dead ends: 4300 [2022-11-21 08:55:20,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 08:55:20,453 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1651 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:20,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1687 Valid, 1201 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 08:55:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2022-11-21 08:55:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 3292. [2022-11-21 08:55:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 2632 states have (on average 1.2693768996960486) internal successors, (3341), 2661 states have internal predecessors, (3341), 341 states have call successors, (341), 276 states have call predecessors, (341), 317 states have return successors, (434), 357 states have call predecessors, (434), 338 states have call successors, (434) [2022-11-21 08:55:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 4116 transitions. [2022-11-21 08:55:20,921 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 4116 transitions. Word has length 77 [2022-11-21 08:55:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:20,922 INFO L495 AbstractCegarLoop]: Abstraction has 3292 states and 4116 transitions. [2022-11-21 08:55:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-21 08:55:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 4116 transitions. [2022-11-21 08:55:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-21 08:55:20,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:20,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:20,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 08:55:20,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1748274255, now seen corresponding path program 1 times [2022-11-21 08:55:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:20,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266979900] [2022-11-21 08:55:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-21 08:55:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 08:55:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266979900] [2022-11-21 08:55:21,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266979900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:21,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:21,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 08:55:21,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52439901] [2022-11-21 08:55:21,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 08:55:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:21,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 08:55:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-21 08:55:21,067 INFO L87 Difference]: Start difference. First operand 3292 states and 4116 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 08:55:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:22,893 INFO L93 Difference]: Finished difference Result 9076 states and 11113 transitions. [2022-11-21 08:55:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 08:55:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-11-21 08:55:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:22,912 INFO L225 Difference]: With dead ends: 9076 [2022-11-21 08:55:22,912 INFO L226 Difference]: Without dead ends: 5378 [2022-11-21 08:55:22,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-11-21 08:55:22,921 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1910 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1922 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:22,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1922 Valid, 1899 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 08:55:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5378 states. [2022-11-21 08:55:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5378 to 5118. [2022-11-21 08:55:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5118 states, 4023 states have (on average 1.230673626646781) internal successors, (4951), 4089 states have internal predecessors, (4951), 541 states have call successors, (541), 448 states have call predecessors, (541), 552 states have return successors, (784), 583 states have call predecessors, (784), 538 states have call successors, (784) [2022-11-21 08:55:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5118 states to 5118 states and 6276 transitions. [2022-11-21 08:55:23,454 INFO L78 Accepts]: Start accepts. Automaton has 5118 states and 6276 transitions. Word has length 84 [2022-11-21 08:55:23,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:23,455 INFO L495 AbstractCegarLoop]: Abstraction has 5118 states and 6276 transitions. [2022-11-21 08:55:23,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 08:55:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5118 states and 6276 transitions. [2022-11-21 08:55:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-21 08:55:23,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:23,458 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:23,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 08:55:23,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1535694468, now seen corresponding path program 1 times [2022-11-21 08:55:23,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:23,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091142215] [2022-11-21 08:55:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:23,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-21 08:55:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 08:55:23,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091142215] [2022-11-21 08:55:23,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091142215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:23,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:23,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 08:55:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946961988] [2022-11-21 08:55:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 08:55:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 08:55:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-21 08:55:23,620 INFO L87 Difference]: Start difference. First operand 5118 states and 6276 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 08:55:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:25,575 INFO L93 Difference]: Finished difference Result 8478 states and 10294 transitions. [2022-11-21 08:55:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 08:55:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2022-11-21 08:55:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:25,592 INFO L225 Difference]: With dead ends: 8478 [2022-11-21 08:55:25,593 INFO L226 Difference]: Without dead ends: 4279 [2022-11-21 08:55:25,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-11-21 08:55:25,603 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 2407 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:25,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2446 Valid, 2256 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-21 08:55:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2022-11-21 08:55:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3858. [2022-11-21 08:55:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3029 states have (on average 1.2231759656652361) internal successors, (3705), 3083 states have internal predecessors, (3705), 406 states have call successors, (406), 330 states have call predecessors, (406), 421 states have return successors, (553), 447 states have call predecessors, (553), 403 states have call successors, (553) [2022-11-21 08:55:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 4664 transitions. [2022-11-21 08:55:26,009 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 4664 transitions. Word has length 93 [2022-11-21 08:55:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:26,010 INFO L495 AbstractCegarLoop]: Abstraction has 3858 states and 4664 transitions. [2022-11-21 08:55:26,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-21 08:55:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 4664 transitions. [2022-11-21 08:55:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-21 08:55:26,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:26,014 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:26,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 08:55:26,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:26,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1225012879, now seen corresponding path program 1 times [2022-11-21 08:55:26,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:26,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988741517] [2022-11-21 08:55:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:26,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-21 08:55:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-21 08:55:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-21 08:55:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-21 08:55:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-11-21 08:55:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-21 08:55:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-21 08:55:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-21 08:55:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:26,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988741517] [2022-11-21 08:55:26,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988741517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 08:55:26,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530273274] [2022-11-21 08:55:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:26,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 08:55:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 08:55:26,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 08:55:26,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 08:55:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 08:55:26,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 08:55:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 08:55:26,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 08:55:26,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530273274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:26,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 08:55:26,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-11-21 08:55:26,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203081352] [2022-11-21 08:55:26,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 08:55:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 08:55:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-21 08:55:26,525 INFO L87 Difference]: Start difference. First operand 3858 states and 4664 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 08:55:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:26,881 INFO L93 Difference]: Finished difference Result 5733 states and 6903 transitions. [2022-11-21 08:55:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:55:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2022-11-21 08:55:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:26,891 INFO L225 Difference]: With dead ends: 5733 [2022-11-21 08:55:26,892 INFO L226 Difference]: Without dead ends: 2274 [2022-11-21 08:55:26,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 08:55:26,901 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 34 mSDsluCounter, 2904 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:26,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3640 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 08:55:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2022-11-21 08:55:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2152. [2022-11-21 08:55:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1769 states have (on average 1.2521198417184851) internal successors, (2215), 1786 states have internal predecessors, (2215), 195 states have call successors, (195), 144 states have call predecessors, (195), 186 states have return successors, (260), 222 states have call predecessors, (260), 192 states have call successors, (260) [2022-11-21 08:55:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2670 transitions. [2022-11-21 08:55:27,144 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2670 transitions. Word has length 145 [2022-11-21 08:55:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:27,145 INFO L495 AbstractCegarLoop]: Abstraction has 2152 states and 2670 transitions. [2022-11-21 08:55:27,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-21 08:55:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2670 transitions. [2022-11-21 08:55:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-21 08:55:27,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:27,150 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:27,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 08:55:27,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 08:55:27,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash -732374681, now seen corresponding path program 1 times [2022-11-21 08:55:27,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196014798] [2022-11-21 08:55:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:27,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-21 08:55:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-21 08:55:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-21 08:55:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-21 08:55:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-21 08:55:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-11-21 08:55:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-21 08:55:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-21 08:55:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196014798] [2022-11-21 08:55:27,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196014798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:27,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:27,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 08:55:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950523210] [2022-11-21 08:55:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 08:55:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 08:55:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 08:55:27,465 INFO L87 Difference]: Start difference. First operand 2152 states and 2670 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 08:55:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:28,329 INFO L93 Difference]: Finished difference Result 2200 states and 2720 transitions. [2022-11-21 08:55:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:55:28,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2022-11-21 08:55:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:28,341 INFO L225 Difference]: With dead ends: 2200 [2022-11-21 08:55:28,342 INFO L226 Difference]: Without dead ends: 1826 [2022-11-21 08:55:28,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 08:55:28,344 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1072 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:28,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1378 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 08:55:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-11-21 08:55:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1781. [2022-11-21 08:55:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1482 states have (on average 1.2746288798920378) internal successors, (1889), 1496 states have internal predecessors, (1889), 154 states have call successors, (154), 109 states have call predecessors, (154), 143 states have return successors, (205), 176 states have call predecessors, (205), 151 states have call successors, (205) [2022-11-21 08:55:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2248 transitions. [2022-11-21 08:55:28,555 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2248 transitions. Word has length 147 [2022-11-21 08:55:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:28,556 INFO L495 AbstractCegarLoop]: Abstraction has 1781 states and 2248 transitions. [2022-11-21 08:55:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-21 08:55:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2248 transitions. [2022-11-21 08:55:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-21 08:55:28,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:28,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:28,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 08:55:28,560 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash -256970733, now seen corresponding path program 1 times [2022-11-21 08:55:28,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:28,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563013646] [2022-11-21 08:55:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-21 08:55:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 08:55:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-21 08:55:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-21 08:55:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-11-21 08:55:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-11-21 08:55:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-11-21 08:55:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-21 08:55:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:28,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563013646] [2022-11-21 08:55:28,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563013646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:28,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:28,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:28,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093251047] [2022-11-21 08:55:28,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:28,714 INFO L87 Difference]: Start difference. First operand 1781 states and 2248 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-21 08:55:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:29,870 INFO L93 Difference]: Finished difference Result 3047 states and 3747 transitions. [2022-11-21 08:55:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 08:55:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2022-11-21 08:55:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:29,878 INFO L225 Difference]: With dead ends: 3047 [2022-11-21 08:55:29,878 INFO L226 Difference]: Without dead ends: 1754 [2022-11-21 08:55:29,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:55:29,881 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 684 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:29,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2214 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 08:55:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2022-11-21 08:55:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1670. [2022-11-21 08:55:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1395 states have (on average 1.2845878136200717) internal successors, (1792), 1409 states have internal predecessors, (1792), 142 states have call successors, (142), 99 states have call predecessors, (142), 131 states have return successors, (187), 162 states have call predecessors, (187), 139 states have call successors, (187) [2022-11-21 08:55:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2121 transitions. [2022-11-21 08:55:30,047 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2121 transitions. Word has length 159 [2022-11-21 08:55:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:30,047 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2121 transitions. [2022-11-21 08:55:30,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-21 08:55:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2121 transitions. [2022-11-21 08:55:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-21 08:55:30,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:30,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:30,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 08:55:30,051 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1070811765, now seen corresponding path program 1 times [2022-11-21 08:55:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:30,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65403379] [2022-11-21 08:55:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:30,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 08:55:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-21 08:55:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-21 08:55:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-21 08:55:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-21 08:55:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-21 08:55:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-21 08:55:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-11-21 08:55:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 08:55:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-21 08:55:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-11-21 08:55:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-21 08:55:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-21 08:55:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-21 08:55:30,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65403379] [2022-11-21 08:55:30,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65403379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 08:55:30,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574417626] [2022-11-21 08:55:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:30,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 08:55:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 08:55:30,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 08:55:30,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 08:55:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 08:55:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 08:55:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-21 08:55:30,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 08:55:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-21 08:55:31,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574417626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 08:55:31,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 08:55:31,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2022-11-21 08:55:31,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517548028] [2022-11-21 08:55:31,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 08:55:31,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 08:55:31,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 08:55:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-21 08:55:31,082 INFO L87 Difference]: Start difference. First operand 1670 states and 2121 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2022-11-21 08:55:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:33,017 INFO L93 Difference]: Finished difference Result 3406 states and 4260 transitions. [2022-11-21 08:55:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 08:55:33,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2022-11-21 08:55:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:33,024 INFO L225 Difference]: With dead ends: 3406 [2022-11-21 08:55:33,024 INFO L226 Difference]: Without dead ends: 2061 [2022-11-21 08:55:33,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2022-11-21 08:55:33,028 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 2241 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2273 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:33,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2273 Valid, 2114 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 08:55:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-11-21 08:55:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1948. [2022-11-21 08:55:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1598 states have (on average 1.2484355444305382) internal successors, (1995), 1613 states have internal predecessors, (1995), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2022-11-21 08:55:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2433 transitions. [2022-11-21 08:55:33,231 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2433 transitions. Word has length 162 [2022-11-21 08:55:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:33,231 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 2433 transitions. [2022-11-21 08:55:33,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2022-11-21 08:55:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2433 transitions. [2022-11-21 08:55:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:33,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:33,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:33,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 08:55:33,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1e9b6b4-de7f-4355-ad27-0fd7d613ae6c/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 08:55:33,446 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1451778894, now seen corresponding path program 1 times [2022-11-21 08:55:33,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:33,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992432428] [2022-11-21 08:55:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:33,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:33,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:33,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:33,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:33,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992432428] [2022-11-21 08:55:33,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992432428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:33,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:33,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 08:55:33,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584871207] [2022-11-21 08:55:33,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 08:55:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 08:55:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 08:55:33,620 INFO L87 Difference]: Start difference. First operand 1948 states and 2433 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:36,227 INFO L93 Difference]: Finished difference Result 2465 states and 3271 transitions. [2022-11-21 08:55:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:55:36,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:55:36,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:36,233 INFO L225 Difference]: With dead ends: 2465 [2022-11-21 08:55:36,234 INFO L226 Difference]: Without dead ends: 2090 [2022-11-21 08:55:36,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 08:55:36,236 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 1147 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:36,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 1001 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 08:55:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-11-21 08:55:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1948. [2022-11-21 08:55:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1598 states have (on average 1.2478097622027535) internal successors, (1994), 1613 states have internal predecessors, (1994), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2022-11-21 08:55:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2432 transitions. [2022-11-21 08:55:36,591 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2432 transitions. Word has length 179 [2022-11-21 08:55:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:36,592 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 2432 transitions. [2022-11-21 08:55:36,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2432 transitions. [2022-11-21 08:55:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:36,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:36,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 08:55:36,596 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2141610384, now seen corresponding path program 1 times [2022-11-21 08:55:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835458625] [2022-11-21 08:55:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:36,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:36,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:36,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:36,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835458625] [2022-11-21 08:55:36,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835458625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:36,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:36,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 08:55:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879137360] [2022-11-21 08:55:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:36,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 08:55:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 08:55:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 08:55:36,769 INFO L87 Difference]: Start difference. First operand 1948 states and 2432 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:39,423 INFO L93 Difference]: Finished difference Result 2457 states and 3254 transitions. [2022-11-21 08:55:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:55:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:55:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:39,430 INFO L225 Difference]: With dead ends: 2457 [2022-11-21 08:55:39,430 INFO L226 Difference]: Without dead ends: 2090 [2022-11-21 08:55:39,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 08:55:39,433 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1138 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:39,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 999 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 08:55:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-11-21 08:55:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1948. [2022-11-21 08:55:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1598 states have (on average 1.2471839799749687) internal successors, (1993), 1613 states have internal predecessors, (1993), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2022-11-21 08:55:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2431 transitions. [2022-11-21 08:55:39,824 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2431 transitions. Word has length 179 [2022-11-21 08:55:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:39,825 INFO L495 AbstractCegarLoop]: Abstraction has 1948 states and 2431 transitions. [2022-11-21 08:55:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2431 transitions. [2022-11-21 08:55:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:39,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:39,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:39,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 08:55:39,829 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1367359022, now seen corresponding path program 1 times [2022-11-21 08:55:39,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:39,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516168069] [2022-11-21 08:55:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:39,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:40,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:40,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:40,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:40,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516168069] [2022-11-21 08:55:40,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516168069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:40,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:40,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 08:55:40,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607866524] [2022-11-21 08:55:40,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:40,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 08:55:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 08:55:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 08:55:40,053 INFO L87 Difference]: Start difference. First operand 1948 states and 2431 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:44,471 INFO L93 Difference]: Finished difference Result 2978 states and 4102 transitions. [2022-11-21 08:55:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 08:55:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:55:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:44,478 INFO L225 Difference]: With dead ends: 2978 [2022-11-21 08:55:44,478 INFO L226 Difference]: Without dead ends: 2614 [2022-11-21 08:55:44,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:55:44,481 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1797 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1826 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:44,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1826 Valid, 1557 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 08:55:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2022-11-21 08:55:44,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2329. [2022-11-21 08:55:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1951 states have (on average 1.3116350589441312) internal successors, (2559), 1967 states have internal predecessors, (2559), 203 states have call successors, (203), 143 states have call predecessors, (203), 173 states have return successors, (280), 219 states have call predecessors, (280), 200 states have call successors, (280) [2022-11-21 08:55:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3042 transitions. [2022-11-21 08:55:44,900 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3042 transitions. Word has length 179 [2022-11-21 08:55:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:44,901 INFO L495 AbstractCegarLoop]: Abstraction has 2329 states and 3042 transitions. [2022-11-21 08:55:44,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3042 transitions. [2022-11-21 08:55:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:44,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:44,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 08:55:44,905 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1541868494, now seen corresponding path program 1 times [2022-11-21 08:55:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:44,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021379808] [2022-11-21 08:55:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:45,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:45,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:45,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:45,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:45,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021379808] [2022-11-21 08:55:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021379808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:45,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:45,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542375836] [2022-11-21 08:55:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:45,198 INFO L87 Difference]: Start difference. First operand 2329 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:50,458 INFO L93 Difference]: Finished difference Result 3903 states and 5602 transitions. [2022-11-21 08:55:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 08:55:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:55:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:50,472 INFO L225 Difference]: With dead ends: 3903 [2022-11-21 08:55:50,473 INFO L226 Difference]: Without dead ends: 3158 [2022-11-21 08:55:50,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 08:55:50,478 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 1836 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1865 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 3935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:50,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1865 Valid, 2795 Invalid, 3935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-21 08:55:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2022-11-21 08:55:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 2684. [2022-11-21 08:55:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2278 states have (on average 1.3489903424056189) internal successors, (3073), 2295 states have internal predecessors, (3073), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2022-11-21 08:55:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3600 transitions. [2022-11-21 08:55:50,974 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3600 transitions. Word has length 179 [2022-11-21 08:55:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:50,975 INFO L495 AbstractCegarLoop]: Abstraction has 2684 states and 3600 transitions. [2022-11-21 08:55:50,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3600 transitions. [2022-11-21 08:55:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:50,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:50,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:50,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 08:55:50,979 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 930599436, now seen corresponding path program 1 times [2022-11-21 08:55:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:50,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198468272] [2022-11-21 08:55:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:51,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:51,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198468272] [2022-11-21 08:55:51,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198468272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:51,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770260912] [2022-11-21 08:55:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:51,220 INFO L87 Difference]: Start difference. First operand 2684 states and 3600 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:53,938 INFO L93 Difference]: Finished difference Result 4274 states and 6198 transitions. [2022-11-21 08:55:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:55:53,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:55:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:53,948 INFO L225 Difference]: With dead ends: 4274 [2022-11-21 08:55:53,948 INFO L226 Difference]: Without dead ends: 3174 [2022-11-21 08:55:53,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:55:53,953 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1581 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:53,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1611 Valid, 1289 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 08:55:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2022-11-21 08:55:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2684. [2022-11-21 08:55:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2278 states have (on average 1.3476733977172959) internal successors, (3070), 2295 states have internal predecessors, (3070), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2022-11-21 08:55:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3597 transitions. [2022-11-21 08:55:54,513 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3597 transitions. Word has length 179 [2022-11-21 08:55:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:54,513 INFO L495 AbstractCegarLoop]: Abstraction has 2684 states and 3597 transitions. [2022-11-21 08:55:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3597 transitions. [2022-11-21 08:55:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:54,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:54,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 08:55:54,517 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash -474592242, now seen corresponding path program 1 times [2022-11-21 08:55:54,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639198393] [2022-11-21 08:55:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:54,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:54,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:54,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:54,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639198393] [2022-11-21 08:55:54,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639198393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:54,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:54,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861857623] [2022-11-21 08:55:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:54,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:54,763 INFO L87 Difference]: Start difference. First operand 2684 states and 3597 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:55:57,478 INFO L93 Difference]: Finished difference Result 4270 states and 6181 transitions. [2022-11-21 08:55:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:55:57,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:55:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:55:57,486 INFO L225 Difference]: With dead ends: 4270 [2022-11-21 08:55:57,486 INFO L226 Difference]: Without dead ends: 3170 [2022-11-21 08:55:57,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:55:57,491 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1579 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 08:55:57,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 1289 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1827 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 08:55:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2022-11-21 08:55:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 2684. [2022-11-21 08:55:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2278 states have (on average 1.3463564530289729) internal successors, (3067), 2295 states have internal predecessors, (3067), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2022-11-21 08:55:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3594 transitions. [2022-11-21 08:55:57,923 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3594 transitions. Word has length 179 [2022-11-21 08:55:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:55:57,924 INFO L495 AbstractCegarLoop]: Abstraction has 2684 states and 3594 transitions. [2022-11-21 08:55:57,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:55:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3594 transitions. [2022-11-21 08:55:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:55:57,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:55:57,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:55:57,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-21 08:55:57,928 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:55:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:55:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1419741644, now seen corresponding path program 1 times [2022-11-21 08:55:57,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:55:57,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22468530] [2022-11-21 08:55:57,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:55:57,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:55:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:55:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:58,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:55:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:58,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:55:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:58,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:55:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:58,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:55:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:55:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:55:58,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:55:58,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22468530] [2022-11-21 08:55:58,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22468530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:55:58,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:55:58,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:55:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420267680] [2022-11-21 08:55:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:55:58,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:55:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:55:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:55:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:55:58,224 INFO L87 Difference]: Start difference. First operand 2684 states and 3594 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:03,729 INFO L93 Difference]: Finished difference Result 5257 states and 7744 transitions. [2022-11-21 08:56:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 08:56:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:03,743 INFO L225 Difference]: With dead ends: 5257 [2022-11-21 08:56:03,743 INFO L226 Difference]: Without dead ends: 4157 [2022-11-21 08:56:03,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 08:56:03,748 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 1817 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3758 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 3862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:03,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1846 Valid, 2793 Invalid, 3862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3758 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-21 08:56:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-21 08:56:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 3403. [2022-11-21 08:56:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 2941 states have (on average 1.3954437266235975) internal successors, (4104), 2960 states have internal predecessors, (4104), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2022-11-21 08:56:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 4723 transitions. [2022-11-21 08:56:04,287 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 4723 transitions. Word has length 179 [2022-11-21 08:56:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:04,288 INFO L495 AbstractCegarLoop]: Abstraction has 3403 states and 4723 transitions. [2022-11-21 08:56:04,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 4723 transitions. [2022-11-21 08:56:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:04,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:04,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:04,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 08:56:04,301 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1428644786, now seen corresponding path program 1 times [2022-11-21 08:56:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:04,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036882345] [2022-11-21 08:56:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:04,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:04,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:04,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:04,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:04,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:04,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:04,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036882345] [2022-11-21 08:56:04,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036882345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:04,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:04,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:04,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483417270] [2022-11-21 08:56:04,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:04,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:04,566 INFO L87 Difference]: Start difference. First operand 3403 states and 4723 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:07,837 INFO L93 Difference]: Finished difference Result 5962 states and 8860 transitions. [2022-11-21 08:56:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:56:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:07,870 INFO L225 Difference]: With dead ends: 5962 [2022-11-21 08:56:07,870 INFO L226 Difference]: Without dead ends: 4143 [2022-11-21 08:56:07,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:56:07,877 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1360 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:07,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 1543 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 08:56:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-11-21 08:56:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3403. [2022-11-21 08:56:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 2941 states have (on average 1.393743624617477) internal successors, (4099), 2960 states have internal predecessors, (4099), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2022-11-21 08:56:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 4718 transitions. [2022-11-21 08:56:08,498 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 4718 transitions. Word has length 179 [2022-11-21 08:56:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:08,498 INFO L495 AbstractCegarLoop]: Abstraction has 3403 states and 4718 transitions. [2022-11-21 08:56:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 4718 transitions. [2022-11-21 08:56:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:08,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:08,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:08,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-21 08:56:08,502 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1943155084, now seen corresponding path program 1 times [2022-11-21 08:56:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:08,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923693983] [2022-11-21 08:56:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:08,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:08,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:08,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:08,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:08,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:08,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:08,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:08,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923693983] [2022-11-21 08:56:08,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923693983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:08,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:08,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:08,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577043915] [2022-11-21 08:56:08,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:08,760 INFO L87 Difference]: Start difference. First operand 3403 states and 4718 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:14,742 INFO L93 Difference]: Finished difference Result 7880 states and 11881 transitions. [2022-11-21 08:56:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 08:56:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:14,764 INFO L225 Difference]: With dead ends: 7880 [2022-11-21 08:56:14,764 INFO L226 Difference]: Without dead ends: 6061 [2022-11-21 08:56:14,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 08:56:14,771 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1908 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1937 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 3488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:14,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1937 Valid, 1889 Invalid, 3488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-21 08:56:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2022-11-21 08:56:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4845. [2022-11-21 08:56:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.444860688363381) internal successors, (6171), 4294 states have internal predecessors, (6171), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2022-11-21 08:56:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6980 transitions. [2022-11-21 08:56:15,605 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6980 transitions. Word has length 179 [2022-11-21 08:56:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:15,606 INFO L495 AbstractCegarLoop]: Abstraction has 4845 states and 6980 transitions. [2022-11-21 08:56:15,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6980 transitions. [2022-11-21 08:56:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:15,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:15,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:15,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-21 08:56:15,611 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1965949810, now seen corresponding path program 1 times [2022-11-21 08:56:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:15,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701827912] [2022-11-21 08:56:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:15,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:15,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:15,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:15,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701827912] [2022-11-21 08:56:15,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701827912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:15,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:15,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357804755] [2022-11-21 08:56:15,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:15,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:15,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:15,909 INFO L87 Difference]: Start difference. First operand 4845 states and 6980 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:19,662 INFO L93 Difference]: Finished difference Result 9342 states and 14211 transitions. [2022-11-21 08:56:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:56:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:19,678 INFO L225 Difference]: With dead ends: 9342 [2022-11-21 08:56:19,678 INFO L226 Difference]: Without dead ends: 6081 [2022-11-21 08:56:19,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:56:19,687 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1364 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:19,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1394 Valid, 1543 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 08:56:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6081 states. [2022-11-21 08:56:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6081 to 4845. [2022-11-21 08:56:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.442753453523765) internal successors, (6162), 4294 states have internal predecessors, (6162), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2022-11-21 08:56:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6971 transitions. [2022-11-21 08:56:20,631 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6971 transitions. Word has length 179 [2022-11-21 08:56:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:20,631 INFO L495 AbstractCegarLoop]: Abstraction has 4845 states and 6971 transitions. [2022-11-21 08:56:20,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6971 transitions. [2022-11-21 08:56:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:20,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:20,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-21 08:56:20,637 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:20,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2064369996, now seen corresponding path program 1 times [2022-11-21 08:56:20,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:20,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917042548] [2022-11-21 08:56:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:20,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:20,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:20,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917042548] [2022-11-21 08:56:20,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917042548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:20,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065319286] [2022-11-21 08:56:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:20,870 INFO L87 Difference]: Start difference. First operand 4845 states and 6971 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:24,285 INFO L93 Difference]: Finished difference Result 9322 states and 14144 transitions. [2022-11-21 08:56:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:56:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:24,300 INFO L225 Difference]: With dead ends: 9322 [2022-11-21 08:56:24,300 INFO L226 Difference]: Without dead ends: 6061 [2022-11-21 08:56:24,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:56:24,309 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1579 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 1289 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1758 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 08:56:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2022-11-21 08:56:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4845. [2022-11-21 08:56:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.4406462186841489) internal successors, (6153), 4294 states have internal predecessors, (6153), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2022-11-21 08:56:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6962 transitions. [2022-11-21 08:56:25,163 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6962 transitions. Word has length 179 [2022-11-21 08:56:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:25,163 INFO L495 AbstractCegarLoop]: Abstraction has 4845 states and 6962 transitions. [2022-11-21 08:56:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6962 transitions. [2022-11-21 08:56:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:25,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:25,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:25,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-21 08:56:25,168 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash 741191050, now seen corresponding path program 1 times [2022-11-21 08:56:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:25,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77869053] [2022-11-21 08:56:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:25,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:25,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:25,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:25,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77869053] [2022-11-21 08:56:25,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77869053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:25,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:25,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267907387] [2022-11-21 08:56:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:25,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:25,406 INFO L87 Difference]: Start difference. First operand 4845 states and 6962 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:29,177 INFO L93 Difference]: Finished difference Result 9312 states and 14097 transitions. [2022-11-21 08:56:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:56:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:29,192 INFO L225 Difference]: With dead ends: 9312 [2022-11-21 08:56:29,192 INFO L226 Difference]: Without dead ends: 6051 [2022-11-21 08:56:29,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:56:29,201 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1359 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:29,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1389 Valid, 1543 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 08:56:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2022-11-21 08:56:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4845. [2022-11-21 08:56:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.4385389838445328) internal successors, (6144), 4294 states have internal predecessors, (6144), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2022-11-21 08:56:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6953 transitions. [2022-11-21 08:56:30,129 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6953 transitions. Word has length 179 [2022-11-21 08:56:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:30,129 INFO L495 AbstractCegarLoop]: Abstraction has 4845 states and 6953 transitions. [2022-11-21 08:56:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6953 transitions. [2022-11-21 08:56:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:30,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:30,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:30,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-21 08:56:30,134 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:30,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1656796788, now seen corresponding path program 1 times [2022-11-21 08:56:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:30,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833857044] [2022-11-21 08:56:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:30,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:30,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:30,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:30,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:30,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:30,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833857044] [2022-11-21 08:56:30,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833857044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:30,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:30,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:30,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158226606] [2022-11-21 08:56:30,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:30,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:30,384 INFO L87 Difference]: Start difference. First operand 4845 states and 6953 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:37,353 INFO L93 Difference]: Finished difference Result 13096 states and 20005 transitions. [2022-11-21 08:56:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 08:56:37,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:37,386 INFO L225 Difference]: With dead ends: 13096 [2022-11-21 08:56:37,386 INFO L226 Difference]: Without dead ends: 9835 [2022-11-21 08:56:37,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-21 08:56:37,397 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 1789 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:37,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 2793 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-21 08:56:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2022-11-21 08:56:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 7770. [2022-11-21 08:56:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 6972 states have (on average 1.4799196787148594) internal successors, (10318), 7003 states have internal predecessors, (10318), 518 states have call successors, (518), 233 states have call predecessors, (518), 278 states have return successors, (689), 549 states have call predecessors, (689), 515 states have call successors, (689) [2022-11-21 08:56:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 11525 transitions. [2022-11-21 08:56:38,925 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 11525 transitions. Word has length 179 [2022-11-21 08:56:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:38,925 INFO L495 AbstractCegarLoop]: Abstraction has 7770 states and 11525 transitions. [2022-11-21 08:56:38,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 11525 transitions. [2022-11-21 08:56:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:38,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:38,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:38,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-21 08:56:38,932 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1318509238, now seen corresponding path program 1 times [2022-11-21 08:56:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964976622] [2022-11-21 08:56:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:38,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:39,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:39,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:39,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:39,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964976622] [2022-11-21 08:56:39,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964976622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:39,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:39,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:39,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205784314] [2022-11-21 08:56:39,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:39,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:39,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:39,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:39,167 INFO L87 Difference]: Start difference. First operand 7770 states and 11525 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:43,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:43,507 INFO L93 Difference]: Finished difference Result 16078 states and 24764 transitions. [2022-11-21 08:56:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 08:56:43,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:43,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:43,535 INFO L225 Difference]: With dead ends: 16078 [2022-11-21 08:56:43,535 INFO L226 Difference]: Without dead ends: 9892 [2022-11-21 08:56:43,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-21 08:56:43,549 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1574 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:43,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1604 Valid, 1287 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 08:56:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9892 states. [2022-11-21 08:56:45,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9892 to 7770. [2022-11-21 08:56:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 6972 states have (on average 1.4774813539873781) internal successors, (10301), 7003 states have internal predecessors, (10301), 518 states have call successors, (518), 233 states have call predecessors, (518), 278 states have return successors, (689), 549 states have call predecessors, (689), 515 states have call successors, (689) [2022-11-21 08:56:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 11508 transitions. [2022-11-21 08:56:45,097 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 11508 transitions. Word has length 179 [2022-11-21 08:56:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:45,098 INFO L495 AbstractCegarLoop]: Abstraction has 7770 states and 11508 transitions. [2022-11-21 08:56:45,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 11508 transitions. [2022-11-21 08:56:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:45,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:45,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:45,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-21 08:56:45,104 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -891954740, now seen corresponding path program 1 times [2022-11-21 08:56:45,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577311612] [2022-11-21 08:56:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:45,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:45,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:45,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:45,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:45,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577311612] [2022-11-21 08:56:45,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577311612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:45,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:45,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33114551] [2022-11-21 08:56:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:45,436 INFO L87 Difference]: Start difference. First operand 7770 states and 11508 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:56:56,501 INFO L93 Difference]: Finished difference Result 26233 states and 40561 transitions. [2022-11-21 08:56:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 08:56:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:56:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:56:56,573 INFO L225 Difference]: With dead ends: 26233 [2022-11-21 08:56:56,573 INFO L226 Difference]: Without dead ends: 20047 [2022-11-21 08:56:56,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-21 08:56:56,595 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 2227 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2269 SdHoareTripleChecker+Valid, 2779 SdHoareTripleChecker+Invalid, 3676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-21 08:56:56,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2269 Valid, 2779 Invalid, 3676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-21 08:56:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20047 states. [2022-11-21 08:56:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20047 to 13436. [2022-11-21 08:56:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 12206 states have (on average 1.5022939537932165) internal successors, (18337), 12253 states have internal predecessors, (18337), 838 states have call successors, (838), 329 states have call predecessors, (838), 390 states have return successors, (1187), 885 states have call predecessors, (1187), 835 states have call successors, (1187) [2022-11-21 08:56:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 20362 transitions. [2022-11-21 08:56:59,344 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 20362 transitions. Word has length 179 [2022-11-21 08:56:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:56:59,345 INFO L495 AbstractCegarLoop]: Abstraction has 13436 states and 20362 transitions. [2022-11-21 08:56:59,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:56:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 20362 transitions. [2022-11-21 08:56:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:56:59,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:56:59,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:56:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-21 08:56:59,352 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:56:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:56:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1432384246, now seen corresponding path program 1 times [2022-11-21 08:56:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:56:59,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36230202] [2022-11-21 08:56:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:56:59,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:56:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:56:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:59,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:56:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:56:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:59,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:56:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:59,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:56:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:56:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:56:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:56:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36230202] [2022-11-21 08:56:59,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36230202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:56:59,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:56:59,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:56:59,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6167511] [2022-11-21 08:56:59,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:56:59,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:56:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:56:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:56:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:56:59,603 INFO L87 Difference]: Start difference. First operand 13436 states and 20362 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:57:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 08:57:16,371 INFO L93 Difference]: Finished difference Result 48857 states and 76185 transitions. [2022-11-21 08:57:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 08:57:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2022-11-21 08:57:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 08:57:16,450 INFO L225 Difference]: With dead ends: 48857 [2022-11-21 08:57:16,450 INFO L226 Difference]: Without dead ends: 37005 [2022-11-21 08:57:16,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-21 08:57:16,479 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1966 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 3915 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-21 08:57:16,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 1885 Invalid, 4065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3915 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-21 08:57:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37005 states. [2022-11-21 08:57:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37005 to 24909. [2022-11-21 08:57:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24909 states, 22831 states have (on average 1.5201699443738776) internal successors, (34707), 22910 states have internal predecessors, (34707), 1462 states have call successors, (1462), 521 states have call predecessors, (1462), 614 states have return successors, (2329), 1541 states have call predecessors, (2329), 1459 states have call successors, (2329) [2022-11-21 08:57:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24909 states to 24909 states and 38498 transitions. [2022-11-21 08:57:22,435 INFO L78 Accepts]: Start accepts. Automaton has 24909 states and 38498 transitions. Word has length 179 [2022-11-21 08:57:22,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 08:57:22,435 INFO L495 AbstractCegarLoop]: Abstraction has 24909 states and 38498 transitions. [2022-11-21 08:57:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-21 08:57:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 24909 states and 38498 transitions. [2022-11-21 08:57:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-21 08:57:22,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 08:57:22,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 08:57:22,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-21 08:57:22,447 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 08:57:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 08:57:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1588364788, now seen corresponding path program 1 times [2022-11-21 08:57:22,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 08:57:22,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013241716] [2022-11-21 08:57:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 08:57:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 08:57:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:57:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-21 08:57:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:57:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-21 08:57:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:57:22,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-21 08:57:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:57:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-21 08:57:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:57:22,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-21 08:57:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 08:57:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 08:57:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 08:57:22,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013241716] [2022-11-21 08:57:22,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013241716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 08:57:22,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 08:57:22,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 08:57:22,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189117582] [2022-11-21 08:57:22,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 08:57:22,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 08:57:22,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 08:57:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 08:57:22,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 08:57:22,687 INFO L87 Difference]: Start difference. First operand 24909 states and 38498 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)