./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- 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-4e7fbc6 [2022-11-23 14:34:44,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:34:44,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:34:44,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:34:44,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:34:44,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:34:44,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:34:44,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:34:44,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:34:44,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:34:44,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:34:44,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:34:44,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:34:44,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:34:44,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:34:44,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:34:44,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:34:44,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:34:44,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:34:44,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:34:44,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:34:44,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:34:44,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:34:44,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:34:44,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:34:44,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:34:44,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:34:44,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:34:44,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:34:44,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:34:44,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:34:44,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:34:44,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:34:44,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:34:44,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:34:44,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:34:44,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:34:44,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:34:44,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:34:44,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:34:44,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:34:44,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:34:44,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:34:44,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:34:44,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:34:44,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:34:44,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:34:44,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:34:44,926 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:34:44,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:34:44,926 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:34:44,927 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:34:44,928 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:34:44,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:34:44,928 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:34:44,929 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:34:44,929 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:34:44,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:34:44,929 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:34:44,930 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:34:44,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:34:44,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:34:44,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:34:44,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:34:44,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:34:44,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:34:44,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:34:44,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:34:44,933 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:34:44,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:34:44,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:34:44,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:34:44,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:34:44,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:34:44,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:34:44,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:34:44,936 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:34:44,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:34:44,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:34:44,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:34:44,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:34:44,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:34:44,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:34:44,938 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_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2022-11-23 14:34:45,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:34:45,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:34:45,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:34:45,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:34:45,312 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:34:45,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2022-11-23 14:34:48,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:34:48,694 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:34:48,695 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2022-11-23 14:34:48,709 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/data/ffb16e007/eea4b8959138463286b4321d7c653292/FLAG5dd72db66 [2022-11-23 14:34:48,724 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/data/ffb16e007/eea4b8959138463286b4321d7c653292 [2022-11-23 14:34:48,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:34:48,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:34:48,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:48,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:34:48,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:34:48,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:48" (1/1) ... [2022-11-23 14:34:48,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ee2a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:48, skipping insertion in model container [2022-11-23 14:34:48,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:48" (1/1) ... [2022-11-23 14:34:48,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:34:48,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:34:48,967 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_37bdf841-2104-44d8-a518-df2ddf6356a4/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2022-11-23 14:34:49,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:49,103 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:34:49,117 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_37bdf841-2104-44d8-a518-df2ddf6356a4/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2022-11-23 14:34:49,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:49,237 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:34:49,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49 WrapperNode [2022-11-23 14:34:49,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:49,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:34:49,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:34:49,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:34:49,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,334 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 861 [2022-11-23 14:34:49,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:34:49,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:34:49,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:34:49,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:34:49,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,429 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:34:49,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:34:49,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:34:49,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:34:49,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (1/1) ... [2022-11-23 14:34:49,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:34:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:49,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:34:49,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:34:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:34:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:34:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-23 14:34:49,540 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-23 14:34:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:34:49,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:34:49,654 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:34:49,656 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:34:50,575 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:34:50,755 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:34:50,755 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-23 14:34:50,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:34:50 BoogieIcfgContainer [2022-11-23 14:34:50,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:34:50,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:34:50,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:34:50,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:34:50,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:34:48" (1/3) ... [2022-11-23 14:34:50,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a004435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:34:50, skipping insertion in model container [2022-11-23 14:34:50,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:49" (2/3) ... [2022-11-23 14:34:50,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a004435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:34:50, skipping insertion in model container [2022-11-23 14:34:50,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:34:50" (3/3) ... [2022-11-23 14:34:50,772 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2022-11-23 14:34:50,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:34:50,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:34:50,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:34:50,863 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@793b1b4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:34:50,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:34:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:34:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:34:50,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:50,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:50,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:50,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:50,891 INFO L85 PathProgramCache]: Analyzing trace with hash -948503043, now seen corresponding path program 1 times [2022-11-23 14:34:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:50,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579662616] [2022-11-23 14:34:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:51,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:51,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579662616] [2022-11-23 14:34:51,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579662616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:51,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:51,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310658277] [2022-11-23 14:34:51,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:51,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:51,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:51,244 INFO L87 Difference]: Start difference. First operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:51,900 INFO L93 Difference]: Finished difference Result 624 states and 1094 transitions. [2022-11-23 14:34:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 14:34:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:51,915 INFO L225 Difference]: With dead ends: 624 [2022-11-23 14:34:51,915 INFO L226 Difference]: Without dead ends: 391 [2022-11-23 14:34:51,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:51,922 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 226 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:51,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 558 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:34:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-23 14:34:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 384. [2022-11-23 14:34:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.5343915343915344) internal successors, (580), 382 states have internal predecessors, (580), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 585 transitions. [2022-11-23 14:34:51,989 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 585 transitions. Word has length 24 [2022-11-23 14:34:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:51,990 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 585 transitions. [2022-11-23 14:34:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 585 transitions. [2022-11-23 14:34:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:34:51,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:51,993 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] [2022-11-23 14:34:51,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:34:51,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:51,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1965554767, now seen corresponding path program 1 times [2022-11-23 14:34:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:51,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692904944] [2022-11-23 14:34:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:52,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:52,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692904944] [2022-11-23 14:34:52,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692904944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:52,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:52,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:34:52,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228266150] [2022-11-23 14:34:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:52,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:52,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:52,109 INFO L87 Difference]: Start difference. First operand 384 states and 585 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:52,375 INFO L93 Difference]: Finished difference Result 997 states and 1548 transitions. [2022-11-23 14:34:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 14:34:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:52,381 INFO L225 Difference]: With dead ends: 997 [2022-11-23 14:34:52,381 INFO L226 Difference]: Without dead ends: 623 [2022-11-23 14:34:52,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:52,389 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 271 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:52,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 741 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:34:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-23 14:34:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 616. [2022-11-23 14:34:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.5721311475409836) internal successors, (959), 614 states have internal predecessors, (959), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 964 transitions. [2022-11-23 14:34:52,444 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 964 transitions. Word has length 36 [2022-11-23 14:34:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:52,444 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 964 transitions. [2022-11-23 14:34:52,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 964 transitions. [2022-11-23 14:34:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:34:52,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:52,448 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] [2022-11-23 14:34:52,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:34:52,448 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1162048500, now seen corresponding path program 1 times [2022-11-23 14:34:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351010573] [2022-11-23 14:34:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:52,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:52,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351010573] [2022-11-23 14:34:52,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351010573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:52,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:52,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:52,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213431339] [2022-11-23 14:34:52,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:52,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:52,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:52,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:52,514 INFO L87 Difference]: Start difference. First operand 616 states and 964 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:52,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:52,673 INFO L93 Difference]: Finished difference Result 1564 states and 2449 transitions. [2022-11-23 14:34:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:52,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 14:34:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:52,680 INFO L225 Difference]: With dead ends: 1564 [2022-11-23 14:34:52,680 INFO L226 Difference]: Without dead ends: 958 [2022-11-23 14:34:52,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:52,690 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 293 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:52,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 597 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-23 14:34:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 947. [2022-11-23 14:34:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 941 states have (on average 1.5642933049946866) internal successors, (1472), 945 states have internal predecessors, (1472), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1477 transitions. [2022-11-23 14:34:52,764 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1477 transitions. Word has length 37 [2022-11-23 14:34:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:52,764 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1477 transitions. [2022-11-23 14:34:52,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1477 transitions. [2022-11-23 14:34:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:34:52,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:52,773 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:34:52,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:34:52,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 641152374, now seen corresponding path program 1 times [2022-11-23 14:34:52,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:52,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107672206] [2022-11-23 14:34:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:52,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107672206] [2022-11-23 14:34:52,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107672206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:52,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:52,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:52,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520494049] [2022-11-23 14:34:52,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:52,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:52,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:52,918 INFO L87 Difference]: Start difference. First operand 947 states and 1477 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:53,173 INFO L93 Difference]: Finished difference Result 2544 states and 3981 transitions. [2022-11-23 14:34:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:53,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-23 14:34:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:53,180 INFO L225 Difference]: With dead ends: 2544 [2022-11-23 14:34:53,180 INFO L226 Difference]: Without dead ends: 1607 [2022-11-23 14:34:53,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:53,183 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 343 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:53,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 777 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-11-23 14:34:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1505. [2022-11-23 14:34:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1499 states have (on average 1.5557038025350234) internal successors, (2332), 1503 states have internal predecessors, (2332), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2337 transitions. [2022-11-23 14:34:53,268 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2337 transitions. Word has length 41 [2022-11-23 14:34:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:53,269 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2337 transitions. [2022-11-23 14:34:53,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2337 transitions. [2022-11-23 14:34:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:34:53,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:53,270 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] [2022-11-23 14:34:53,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:34:53,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash -652123043, now seen corresponding path program 1 times [2022-11-23 14:34:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922651050] [2022-11-23 14:34:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:53,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:53,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922651050] [2022-11-23 14:34:53,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922651050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:53,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:53,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:34:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008835103] [2022-11-23 14:34:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:53,322 INFO L87 Difference]: Start difference. First operand 1505 states and 2337 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:53,719 INFO L93 Difference]: Finished difference Result 4290 states and 6652 transitions. [2022-11-23 14:34:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:53,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-23 14:34:53,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:53,732 INFO L225 Difference]: With dead ends: 4290 [2022-11-23 14:34:53,732 INFO L226 Difference]: Without dead ends: 2793 [2022-11-23 14:34:53,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:53,736 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 315 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:53,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 615 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2022-11-23 14:34:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2740. [2022-11-23 14:34:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2734 states have (on average 1.5303584491587419) internal successors, (4184), 2738 states have internal predecessors, (4184), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4189 transitions. [2022-11-23 14:34:53,943 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4189 transitions. Word has length 48 [2022-11-23 14:34:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:53,944 INFO L495 AbstractCegarLoop]: Abstraction has 2740 states and 4189 transitions. [2022-11-23 14:34:53,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4189 transitions. [2022-11-23 14:34:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:34:53,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:53,946 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] [2022-11-23 14:34:53,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:34:53,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2093269485, now seen corresponding path program 1 times [2022-11-23 14:34:53,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:53,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354893965] [2022-11-23 14:34:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:53,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354893965] [2022-11-23 14:34:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354893965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:53,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:53,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:54,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626823696] [2022-11-23 14:34:54,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:54,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:54,008 INFO L87 Difference]: Start difference. First operand 2740 states and 4189 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:54,403 INFO L93 Difference]: Finished difference Result 6433 states and 9806 transitions. [2022-11-23 14:34:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-23 14:34:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:54,419 INFO L225 Difference]: With dead ends: 6433 [2022-11-23 14:34:54,419 INFO L226 Difference]: Without dead ends: 3702 [2022-11-23 14:34:54,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:54,429 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 302 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:54,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 528 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-11-23 14:34:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3554. [2022-11-23 14:34:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3548 states have (on average 1.5146561443066517) internal successors, (5374), 3552 states have internal predecessors, (5374), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5379 transitions. [2022-11-23 14:34:54,698 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5379 transitions. Word has length 48 [2022-11-23 14:34:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:54,698 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 5379 transitions. [2022-11-23 14:34:54,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5379 transitions. [2022-11-23 14:34:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:34:54,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:54,701 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] [2022-11-23 14:34:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:34:54,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1568629586, now seen corresponding path program 1 times [2022-11-23 14:34:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:54,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441879670] [2022-11-23 14:34:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:54,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441879670] [2022-11-23 14:34:54,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441879670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:54,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:54,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:34:54,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327906597] [2022-11-23 14:34:54,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:54,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:54,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:54,757 INFO L87 Difference]: Start difference. First operand 3554 states and 5379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:55,378 INFO L93 Difference]: Finished difference Result 8592 states and 13055 transitions. [2022-11-23 14:34:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-23 14:34:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:55,397 INFO L225 Difference]: With dead ends: 8592 [2022-11-23 14:34:55,397 INFO L226 Difference]: Without dead ends: 5047 [2022-11-23 14:34:55,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:55,403 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 214 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 628 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:34:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2022-11-23 14:34:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 4964. [2022-11-23 14:34:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4958 states have (on average 1.4441306978620412) internal successors, (7160), 4962 states have internal predecessors, (7160), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 7165 transitions. [2022-11-23 14:34:55,760 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 7165 transitions. Word has length 55 [2022-11-23 14:34:55,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:55,760 INFO L495 AbstractCegarLoop]: Abstraction has 4964 states and 7165 transitions. [2022-11-23 14:34:55,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 7165 transitions. [2022-11-23 14:34:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 14:34:55,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:55,763 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] [2022-11-23 14:34:55,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:34:55,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1247083202, now seen corresponding path program 1 times [2022-11-23 14:34:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:55,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550752587] [2022-11-23 14:34:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:55,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:55,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550752587] [2022-11-23 14:34:55,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550752587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:55,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:55,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:55,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800144222] [2022-11-23 14:34:55,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:55,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:55,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:55,816 INFO L87 Difference]: Start difference. First operand 4964 states and 7165 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:56,198 INFO L93 Difference]: Finished difference Result 9784 states and 14152 transitions. [2022-11-23 14:34:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:56,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-23 14:34:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:56,217 INFO L225 Difference]: With dead ends: 9784 [2022-11-23 14:34:56,218 INFO L226 Difference]: Without dead ends: 4829 [2022-11-23 14:34:56,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:56,226 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 287 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:56,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 334 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2022-11-23 14:34:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2022-11-23 14:34:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4823 states have (on average 1.4349989633008502) internal successors, (6921), 4827 states have internal predecessors, (6921), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 6926 transitions. [2022-11-23 14:34:56,545 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 6926 transitions. Word has length 57 [2022-11-23 14:34:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:56,546 INFO L495 AbstractCegarLoop]: Abstraction has 4829 states and 6926 transitions. [2022-11-23 14:34:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 6926 transitions. [2022-11-23 14:34:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 14:34:56,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:56,548 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] [2022-11-23 14:34:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:34:56,549 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:56,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1900326386, now seen corresponding path program 1 times [2022-11-23 14:34:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:56,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189296193] [2022-11-23 14:34:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:56,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:56,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:56,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189296193] [2022-11-23 14:34:56,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189296193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:56,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:56,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:34:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301426929] [2022-11-23 14:34:56,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:56,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:56,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:56,602 INFO L87 Difference]: Start difference. First operand 4829 states and 6926 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:57,050 INFO L93 Difference]: Finished difference Result 10075 states and 14616 transitions. [2022-11-23 14:34:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-23 14:34:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:57,070 INFO L225 Difference]: With dead ends: 10075 [2022-11-23 14:34:57,070 INFO L226 Difference]: Without dead ends: 5255 [2022-11-23 14:34:57,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:57,078 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 264 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:57,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 751 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2022-11-23 14:34:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 3693. [2022-11-23 14:34:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 3687 states have (on average 1.4521291022511527) internal successors, (5354), 3691 states have internal predecessors, (5354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5359 transitions. [2022-11-23 14:34:57,433 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5359 transitions. Word has length 58 [2022-11-23 14:34:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:57,434 INFO L495 AbstractCegarLoop]: Abstraction has 3693 states and 5359 transitions. [2022-11-23 14:34:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5359 transitions. [2022-11-23 14:34:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:34:57,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:57,436 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] [2022-11-23 14:34:57,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:34:57,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1982651402, now seen corresponding path program 1 times [2022-11-23 14:34:57,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:57,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604884655] [2022-11-23 14:34:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:57,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:34:57,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:57,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604884655] [2022-11-23 14:34:57,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604884655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:57,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:57,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:34:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613189817] [2022-11-23 14:34:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:57,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:34:57,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:34:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:34:57,605 INFO L87 Difference]: Start difference. First operand 3693 states and 5359 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:34:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:59,400 INFO L93 Difference]: Finished difference Result 16798 states and 24182 transitions. [2022-11-23 14:34:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:34:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-23 14:34:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:59,451 INFO L225 Difference]: With dead ends: 16798 [2022-11-23 14:34:59,451 INFO L226 Difference]: Without dead ends: 13202 [2022-11-23 14:34:59,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:34:59,459 INFO L413 NwaCegarLoop]: 1192 mSDtfsCounter, 2083 mSDsluCounter, 3894 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2083 SdHoareTripleChecker+Valid, 5086 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:59,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2083 Valid, 5086 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:34:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13202 states. [2022-11-23 14:34:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13202 to 4467. [2022-11-23 14:35:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4461 states have (on average 1.4440708361353956) internal successors, (6442), 4465 states have internal predecessors, (6442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6447 transitions. [2022-11-23 14:35:00,032 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6447 transitions. Word has length 60 [2022-11-23 14:35:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:00,034 INFO L495 AbstractCegarLoop]: Abstraction has 4467 states and 6447 transitions. [2022-11-23 14:35:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6447 transitions. [2022-11-23 14:35:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:35:00,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:00,036 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] [2022-11-23 14:35:00,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:35:00,037 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:00,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1699014877, now seen corresponding path program 1 times [2022-11-23 14:35:00,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:00,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831185361] [2022-11-23 14:35:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:00,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:00,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:00,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831185361] [2022-11-23 14:35:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831185361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:00,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:00,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:35:00,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765916706] [2022-11-23 14:35:00,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:00,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:35:00,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:00,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:35:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:35:00,212 INFO L87 Difference]: Start difference. First operand 4467 states and 6447 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:03,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:03,915 INFO L93 Difference]: Finished difference Result 29620 states and 42518 transitions. [2022-11-23 14:35:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 14:35:03,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-23 14:35:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:03,996 INFO L225 Difference]: With dead ends: 29620 [2022-11-23 14:35:03,996 INFO L226 Difference]: Without dead ends: 25250 [2022-11-23 14:35:04,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:35:04,011 INFO L413 NwaCegarLoop]: 1416 mSDtfsCounter, 3215 mSDsluCounter, 5148 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3215 SdHoareTripleChecker+Valid, 6564 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:04,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3215 Valid, 6564 Invalid, 910 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:35:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2022-11-23 14:35:04,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 4751. [2022-11-23 14:35:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4745 states have (on average 1.4343519494204426) internal successors, (6806), 4749 states have internal predecessors, (6806), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 6811 transitions. [2022-11-23 14:35:04,918 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 6811 transitions. Word has length 61 [2022-11-23 14:35:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:04,919 INFO L495 AbstractCegarLoop]: Abstraction has 4751 states and 6811 transitions. [2022-11-23 14:35:04,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 6811 transitions. [2022-11-23 14:35:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:35:04,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:04,922 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:35:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:35:04,922 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 597837696, now seen corresponding path program 1 times [2022-11-23 14:35:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620487775] [2022-11-23 14:35:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:04,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:04,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620487775] [2022-11-23 14:35:04,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620487775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:04,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:04,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:04,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853156854] [2022-11-23 14:35:04,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:04,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:04,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:04,977 INFO L87 Difference]: Start difference. First operand 4751 states and 6811 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:05,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:05,621 INFO L93 Difference]: Finished difference Result 10027 states and 14343 transitions. [2022-11-23 14:35:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:05,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-11-23 14:35:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:05,634 INFO L225 Difference]: With dead ends: 10027 [2022-11-23 14:35:05,634 INFO L226 Difference]: Without dead ends: 5300 [2022-11-23 14:35:05,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:05,644 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 130 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:05,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 632 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2022-11-23 14:35:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4802. [2022-11-23 14:35:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4796 states have (on average 1.4311926605504588) internal successors, (6864), 4800 states have internal predecessors, (6864), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 6869 transitions. [2022-11-23 14:35:06,302 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 6869 transitions. Word has length 72 [2022-11-23 14:35:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:06,303 INFO L495 AbstractCegarLoop]: Abstraction has 4802 states and 6869 transitions. [2022-11-23 14:35:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 6869 transitions. [2022-11-23 14:35:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 14:35:06,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:06,312 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:35:06,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:35:06,313 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1227909120, now seen corresponding path program 1 times [2022-11-23 14:35:06,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:06,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385828253] [2022-11-23 14:35:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:06,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:06,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:06,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385828253] [2022-11-23 14:35:06,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385828253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:06,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:06,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:35:06,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668211745] [2022-11-23 14:35:06,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:06,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:06,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:06,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:06,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:06,395 INFO L87 Difference]: Start difference. First operand 4802 states and 6869 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:07,371 INFO L93 Difference]: Finished difference Result 11565 states and 16492 transitions. [2022-11-23 14:35:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:35:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-23 14:35:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:07,387 INFO L225 Difference]: With dead ends: 11565 [2022-11-23 14:35:07,388 INFO L226 Difference]: Without dead ends: 6714 [2022-11-23 14:35:07,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:07,397 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 441 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:07,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 969 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2022-11-23 14:35:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 5439. [2022-11-23 14:35:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5433 states have (on average 1.4163445610160132) internal successors, (7695), 5437 states have internal predecessors, (7695), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7700 transitions. [2022-11-23 14:35:08,030 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7700 transitions. Word has length 83 [2022-11-23 14:35:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:08,031 INFO L495 AbstractCegarLoop]: Abstraction has 5439 states and 7700 transitions. [2022-11-23 14:35:08,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7700 transitions. [2022-11-23 14:35:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:35:08,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:08,033 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-23 14:35:08,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:35:08,034 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1899060307, now seen corresponding path program 1 times [2022-11-23 14:35:08,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:08,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352072974] [2022-11-23 14:35:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:08,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:08,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352072974] [2022-11-23 14:35:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352072974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:08,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:08,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19054326] [2022-11-23 14:35:08,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:08,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:08,120 INFO L87 Difference]: Start difference. First operand 5439 states and 7700 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:08,612 INFO L93 Difference]: Finished difference Result 7990 states and 11377 transitions. [2022-11-23 14:35:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-23 14:35:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:08,619 INFO L225 Difference]: With dead ends: 7990 [2022-11-23 14:35:08,619 INFO L226 Difference]: Without dead ends: 2505 [2022-11-23 14:35:08,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:08,627 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 308 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:08,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 431 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-11-23 14:35:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2469. [2022-11-23 14:35:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2463 states have (on average 1.3686561104344295) internal successors, (3371), 2467 states have internal predecessors, (3371), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3376 transitions. [2022-11-23 14:35:09,004 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3376 transitions. Word has length 89 [2022-11-23 14:35:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:09,004 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 3376 transitions. [2022-11-23 14:35:09,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3376 transitions. [2022-11-23 14:35:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 14:35:09,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:09,006 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:35:09,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:35:09,006 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:09,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1522163798, now seen corresponding path program 1 times [2022-11-23 14:35:09,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:09,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58964320] [2022-11-23 14:35:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:09,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:09,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:09,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58964320] [2022-11-23 14:35:09,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58964320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:09,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:09,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:35:09,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578936185] [2022-11-23 14:35:09,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:09,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:35:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:35:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:09,087 INFO L87 Difference]: Start difference. First operand 2469 states and 3376 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:10,529 INFO L93 Difference]: Finished difference Result 9402 states and 12914 transitions. [2022-11-23 14:35:10,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:35:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-11-23 14:35:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:10,543 INFO L225 Difference]: With dead ends: 9402 [2022-11-23 14:35:10,543 INFO L226 Difference]: Without dead ends: 7048 [2022-11-23 14:35:10,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:35:10,550 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1411 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:10,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 2695 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:35:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2022-11-23 14:35:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 2471. [2022-11-23 14:35:11,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.365922920892495) internal successors, (3367), 2469 states have internal predecessors, (3367), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3372 transitions. [2022-11-23 14:35:11,048 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3372 transitions. Word has length 93 [2022-11-23 14:35:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:11,049 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3372 transitions. [2022-11-23 14:35:11,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3372 transitions. [2022-11-23 14:35:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-23 14:35:11,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:11,052 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:35:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:35:11,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1494756239, now seen corresponding path program 1 times [2022-11-23 14:35:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:11,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713965917] [2022-11-23 14:35:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:11,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:11,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713965917] [2022-11-23 14:35:11,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713965917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:11,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914296410] [2022-11-23 14:35:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:11,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:11,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:11,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:35:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:35:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:11,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:11,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914296410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:11,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:35:11,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-23 14:35:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392291724] [2022-11-23 14:35:11,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:11,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:11,521 INFO L87 Difference]: Start difference. First operand 2471 states and 3372 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:12,207 INFO L93 Difference]: Finished difference Result 2496 states and 3395 transitions. [2022-11-23 14:35:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-23 14:35:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:12,212 INFO L225 Difference]: With dead ends: 2496 [2022-11-23 14:35:12,213 INFO L226 Difference]: Without dead ends: 2492 [2022-11-23 14:35:12,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:12,215 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 208 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:12,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 638 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-23 14:35:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2471. [2022-11-23 14:35:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3606490872210952) internal successors, (3354), 2469 states have internal predecessors, (3354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3359 transitions. [2022-11-23 14:35:12,626 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3359 transitions. Word has length 95 [2022-11-23 14:35:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:12,627 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3359 transitions. [2022-11-23 14:35:12,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3359 transitions. [2022-11-23 14:35:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-23 14:35:12,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:12,630 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:12,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:12,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:35:12,837 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2097237699, now seen corresponding path program 1 times [2022-11-23 14:35:12,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:12,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771106406] [2022-11-23 14:35:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:12,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:12,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771106406] [2022-11-23 14:35:12,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771106406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394141273] [2022-11-23 14:35:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:12,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:12,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:35:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:35:13,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:13,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:13,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394141273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:13,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:35:13,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-23 14:35:13,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698652203] [2022-11-23 14:35:13,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:13,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:13,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:13,250 INFO L87 Difference]: Start difference. First operand 2471 states and 3359 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:13,712 INFO L93 Difference]: Finished difference Result 4805 states and 6569 transitions. [2022-11-23 14:35:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:13,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-11-23 14:35:13,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:13,717 INFO L225 Difference]: With dead ends: 4805 [2022-11-23 14:35:13,717 INFO L226 Difference]: Without dead ends: 2471 [2022-11-23 14:35:13,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:13,721 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:13,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 340 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-11-23 14:35:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2022-11-23 14:35:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3322515212981745) internal successors, (3284), 2469 states have internal predecessors, (3284), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3289 transitions. [2022-11-23 14:35:13,997 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3289 transitions. Word has length 148 [2022-11-23 14:35:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:13,997 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3289 transitions. [2022-11-23 14:35:13,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3289 transitions. [2022-11-23 14:35:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-23 14:35:14,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:14,000 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:14,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:14,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:35:14,206 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2103517487, now seen corresponding path program 1 times [2022-11-23 14:35:14,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:14,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409273524] [2022-11-23 14:35:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:14,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:14,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409273524] [2022-11-23 14:35:14,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409273524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:14,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480288006] [2022-11-23 14:35:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:14,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:14,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:14,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:14,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:35:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:35:14,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:35:14,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:14,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480288006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:14,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:35:14,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:35:14,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119444379] [2022-11-23 14:35:14,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:14,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:14,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:14,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:14,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:14,603 INFO L87 Difference]: Start difference. First operand 2471 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:15,096 INFO L93 Difference]: Finished difference Result 4805 states and 6429 transitions. [2022-11-23 14:35:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-23 14:35:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:15,102 INFO L225 Difference]: With dead ends: 4805 [2022-11-23 14:35:15,102 INFO L226 Difference]: Without dead ends: 2471 [2022-11-23 14:35:15,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:15,107 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 247 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:15,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 312 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-11-23 14:35:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2022-11-23 14:35:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3038539553752535) internal successors, (3214), 2469 states have internal predecessors, (3214), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3219 transitions. [2022-11-23 14:35:15,511 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3219 transitions. Word has length 151 [2022-11-23 14:35:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:15,512 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3219 transitions. [2022-11-23 14:35:15,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3219 transitions. [2022-11-23 14:35:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-23 14:35:15,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:15,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:15,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:15,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:35:15,721 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash 429733012, now seen corresponding path program 1 times [2022-11-23 14:35:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:15,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609287217] [2022-11-23 14:35:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:15,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609287217] [2022-11-23 14:35:15,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609287217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162179873] [2022-11-23 14:35:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:15,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:15,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:35:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:35:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:35:16,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:16,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162179873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:16,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:35:16,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 14:35:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975745168] [2022-11-23 14:35:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:16,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:16,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:16,037 INFO L87 Difference]: Start difference. First operand 2471 states and 3219 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:16,941 INFO L93 Difference]: Finished difference Result 5544 states and 7364 transitions. [2022-11-23 14:35:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-23 14:35:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:16,948 INFO L225 Difference]: With dead ends: 5544 [2022-11-23 14:35:16,948 INFO L226 Difference]: Without dead ends: 3210 [2022-11-23 14:35:16,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:16,952 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 181 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:16,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 554 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:35:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2022-11-23 14:35:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3026. [2022-11-23 14:35:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.2841059602649008) internal successors, (3878), 3024 states have internal predecessors, (3878), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 3883 transitions. [2022-11-23 14:35:17,464 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 3883 transitions. Word has length 152 [2022-11-23 14:35:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:17,465 INFO L495 AbstractCegarLoop]: Abstraction has 3026 states and 3883 transitions. [2022-11-23 14:35:17,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 3883 transitions. [2022-11-23 14:35:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-23 14:35:17,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:17,468 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-23 14:35:17,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:17,674 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2145869779, now seen corresponding path program 1 times [2022-11-23 14:35:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:17,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676791179] [2022-11-23 14:35:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:17,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676791179] [2022-11-23 14:35:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676791179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072280719] [2022-11-23 14:35:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:17,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:17,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:17,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:18,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:35:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:35:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:18,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 14:35:18,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072280719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:18,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538447900] [2022-11-23 14:35:18,758 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-11-23 14:35:18,758 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:35:18,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:35:18,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:35:18,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:36:02,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:36:58,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1538447900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:58,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:36:58,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [9, 9, 9] total 59 [2022-11-23 14:36:58,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807541855] [2022-11-23 14:36:58,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:58,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 14:36:58,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 14:36:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 14:36:58,781 INFO L87 Difference]: Start difference. First operand 3026 states and 3883 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:37:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:30,775 INFO L93 Difference]: Finished difference Result 6089 states and 7807 transitions. [2022-11-23 14:37:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:37:30,776 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-11-23 14:37:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:30,781 INFO L225 Difference]: With dead ends: 6089 [2022-11-23 14:37:30,781 INFO L226 Difference]: Without dead ends: 3055 [2022-11-23 14:37:30,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 379 SyntacticMatches, 34 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=319, Invalid=4793, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 14:37:30,788 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 174 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 10322 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 10378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 10322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:30,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1491 Invalid, 10378 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [56 Valid, 10322 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2022-11-23 14:37:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-11-23 14:37:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3050. [2022-11-23 14:37:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3044 states have (on average 1.2792378449408672) internal successors, (3894), 3048 states have internal predecessors, (3894), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:37:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 3899 transitions. [2022-11-23 14:37:31,316 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 3899 transitions. Word has length 154 [2022-11-23 14:37:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:31,317 INFO L495 AbstractCegarLoop]: Abstraction has 3050 states and 3899 transitions. [2022-11-23 14:37:31,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:37:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 3899 transitions. [2022-11-23 14:37:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-23 14:37:31,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:31,321 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-23 14:37:31,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:37:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:31,527 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:37:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1188463544, now seen corresponding path program 1 times [2022-11-23 14:37:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:37:31,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827804827] [2022-11-23 14:37:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:37:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:37:32,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:37:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827804827] [2022-11-23 14:37:32,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827804827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:37:32,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122930242] [2022-11-23 14:37:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:32,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:37:32,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:37:32,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:37:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:37:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:37:32,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:37:33,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122930242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576084301] [2022-11-23 14:37:33,521 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-11-23 14:37:33,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:37:33,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:37:33,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:37:33,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:38:27,554 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 105 for LOIs [2022-11-23 14:38:27,583 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:39:11,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '327066#(and (= ~c_read_req_ev~0 2) (or (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (= ~s_memory2~0 0) (<= ~req_t_type___0~0 1) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (= 2 ~s_run_pc~0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0)) (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (= ~s_memory2~0 0) (<= ~req_t_type___0~0 1) (= ~s_run_pc~0 0) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0))))' at error location [2022-11-23 14:39:11,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:39:11,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:39:11,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-11-23 14:39:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112441322] [2022-11-23 14:39:11,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:39:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:39:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:39:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4060, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 14:39:11,104 INFO L87 Difference]: Start difference. First operand 3050 states and 3899 transitions. Second operand has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:39:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:16,324 INFO L93 Difference]: Finished difference Result 18759 states and 24119 transitions. [2022-11-23 14:39:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 14:39:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-11-23 14:39:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:16,348 INFO L225 Difference]: With dead ends: 18759 [2022-11-23 14:39:16,348 INFO L226 Difference]: Without dead ends: 15870 [2022-11-23 14:39:16,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 690 SyntacticMatches, 21 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=480, Invalid=9420, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 14:39:16,356 INFO L413 NwaCegarLoop]: 1193 mSDtfsCounter, 5481 mSDsluCounter, 8334 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5481 SdHoareTripleChecker+Valid, 9527 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:16,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5481 Valid, 9527 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:39:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15870 states. [2022-11-23 14:39:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15870 to 5642. [2022-11-23 14:39:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5642 states, 5636 states have (on average 1.2872604684173172) internal successors, (7255), 5640 states have internal predecessors, (7255), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:39:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7260 transitions. [2022-11-23 14:39:17,547 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7260 transitions. Word has length 249 [2022-11-23 14:39:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:17,548 INFO L495 AbstractCegarLoop]: Abstraction has 5642 states and 7260 transitions. [2022-11-23 14:39:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:39:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7260 transitions. [2022-11-23 14:39:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-23 14:39:17,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:17,554 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 14:39:17,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:17,768 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash 555993336, now seen corresponding path program 1 times [2022-11-23 14:39:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143579872] [2022-11-23 14:39:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 122 proven. 329 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:39:18,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:18,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143579872] [2022-11-23 14:39:18,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143579872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:18,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644512392] [2022-11-23 14:39:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:18,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:18,598 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:18,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bdf841-2104-44d8-a518-df2ddf6356a4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:39:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:18,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 14:39:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:39:19,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 14:39:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644512392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [940805498] [2022-11-23 14:39:19,876 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-11-23 14:39:19,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:39:19,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:39:19,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:39:19,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:12,817 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 148 for LOIs [2022-11-23 14:40:12,848 INFO L180 IcfgInterpreter]: Interpretation finished