./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI --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 c2172e48d59a79636c380f4fc82a3f737aa7d3f80daa2bd10bb2cc27a12a3e78 --- 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-5e519f3 [2022-11-03 03:56:03,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:56:03,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:56:03,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:56:03,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:56:03,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:56:03,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:56:03,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:56:03,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:56:03,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:56:03,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:56:03,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:56:03,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:56:03,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:56:03,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:56:03,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:56:03,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:56:03,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:56:03,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:56:03,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:56:03,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:56:03,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:56:03,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:56:03,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:56:03,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:56:03,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:56:03,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:56:03,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:56:03,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:56:03,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:56:03,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:56:03,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:56:03,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:56:03,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:56:03,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:56:03,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:56:03,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:56:03,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:56:03,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:56:03,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:56:03,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:56:03,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:56:03,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:56:03,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:56:03,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:56:03,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:56:03,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:56:03,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:56:03,187 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:56:03,188 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:56:03,188 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:56:03,188 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:56:03,189 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:56:03,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:56:03,189 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:56:03,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:56:03,190 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:56:03,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:56:03,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:56:03,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:56:03,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:56:03,192 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:56:03,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:56:03,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:56:03,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:56:03,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:56:03,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:56:03,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:56:03,194 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:56:03,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:56:03,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:56:03,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:56:03,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:56:03,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:56:03,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:03,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:56:03,196 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:56:03,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:56:03,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:56:03,196 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:56:03,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:56:03,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:56:03,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:56:03,197 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_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2172e48d59a79636c380f4fc82a3f737aa7d3f80daa2bd10bb2cc27a12a3e78 [2022-11-03 03:56:03,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:56:03,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:56:03,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:56:03,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:56:03,663 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:56:03,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c [2022-11-03 03:56:03,743 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/data/485541eab/58b30b8db4f945e9a3e71729e6d168b9/FLAG4449c7c90 [2022-11-03 03:56:04,417 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:56:04,418 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c [2022-11-03 03:56:04,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/data/485541eab/58b30b8db4f945e9a3e71729e6d168b9/FLAG4449c7c90 [2022-11-03 03:56:04,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/data/485541eab/58b30b8db4f945e9a3e71729e6d168b9 [2022-11-03 03:56:04,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:56:04,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:56:04,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:04,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:56:04,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:56:04,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:04" (1/1) ... [2022-11-03 03:56:04,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69284a28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:04, skipping insertion in model container [2022-11-03 03:56:04,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:04" (1/1) ... [2022-11-03 03:56:04,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:56:04,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:05,036 WARN L230 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_703e1344-7459-41a9-b005-dc5a59aa0c9b/sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c[646,659] [2022-11-03 03:56:05,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:05,172 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:56:05,186 WARN L230 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_703e1344-7459-41a9-b005-dc5a59aa0c9b/sv-benchmarks/c/systemc/mem_slave_tlm.1.cil.c[646,659] [2022-11-03 03:56:05,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:05,283 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:56:05,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05 WrapperNode [2022-11-03 03:56:05,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:05,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:05,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:56:05,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:56:05,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,350 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 846 [2022-11-03 03:56:05,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:05,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:56:05,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:56:05,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:56:05,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,440 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:56:05,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:56:05,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:56:05,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:56:05,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (1/1) ... [2022-11-03 03:56:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:05,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:05,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:56:05,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:56:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:56:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:56:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 03:56:05,554 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 03:56:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:56:05,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:56:05,741 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:56:05,743 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:56:06,823 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:07,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:07,127 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-03 03:56:07,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:07 BoogieIcfgContainer [2022-11-03 03:56:07,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:07,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:07,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:07,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:07,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:56:04" (1/3) ... [2022-11-03 03:56:07,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6286d5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:07, skipping insertion in model container [2022-11-03 03:56:07,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:05" (2/3) ... [2022-11-03 03:56:07,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6286d5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:07, skipping insertion in model container [2022-11-03 03:56:07,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:07" (3/3) ... [2022-11-03 03:56:07,146 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.1.cil.c [2022-11-03 03:56:07,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:07,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:56:07,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:07,265 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;@7bc9fe5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:07,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:56:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 217 states have (on average 1.7788018433179724) internal successors, (386), 223 states have internal predecessors, (386), 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) [2022-11-03 03:56:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:56:07,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:07,300 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] [2022-11-03 03:56:07,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:07,316 INFO L85 PathProgramCache]: Analyzing trace with hash -347552638, now seen corresponding path program 1 times [2022-11-03 03:56:07,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:07,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893237230] [2022-11-03 03:56:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:07,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:07,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:07,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893237230] [2022-11-03 03:56:07,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893237230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:07,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:07,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:07,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559918930] [2022-11-03 03:56:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:07,759 INFO L87 Difference]: Start difference. First operand has 225 states, 217 states have (on average 1.7788018433179724) internal successors, (386), 223 states have internal predecessors, (386), 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) [2022-11-03 03:56:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:08,292 INFO L93 Difference]: Finished difference Result 600 states and 1046 transitions. [2022-11-03 03:56:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:08,295 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 [2022-11-03 03:56:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:08,308 INFO L225 Difference]: With dead ends: 600 [2022-11-03 03:56:08,309 INFO L226 Difference]: Without dead ends: 373 [2022-11-03 03:56:08,313 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 [2022-11-03 03:56:08,317 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 207 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:08,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 541 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-03 03:56:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 366. [2022-11-03 03:56:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.525) internal successors, (549), 364 states have internal predecessors, (549), 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) [2022-11-03 03:56:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 554 transitions. [2022-11-03 03:56:08,403 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 554 transitions. Word has length 24 [2022-11-03 03:56:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:08,404 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 554 transitions. [2022-11-03 03:56:08,404 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) [2022-11-03 03:56:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 554 transitions. [2022-11-03 03:56:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 03:56:08,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:08,408 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] [2022-11-03 03:56:08,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:56:08,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash -319067925, now seen corresponding path program 1 times [2022-11-03 03:56:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449476108] [2022-11-03 03:56:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:08,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:08,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449476108] [2022-11-03 03:56:08,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449476108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:08,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:08,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:08,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046387414] [2022-11-03 03:56:08,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:08,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:08,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:08,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:08,495 INFO L87 Difference]: Start difference. First operand 366 states and 554 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-03 03:56:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:08,817 INFO L93 Difference]: Finished difference Result 949 states and 1462 transitions. [2022-11-03 03:56:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 33 [2022-11-03 03:56:08,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:08,822 INFO L225 Difference]: With dead ends: 949 [2022-11-03 03:56:08,822 INFO L226 Difference]: Without dead ends: 593 [2022-11-03 03:56:08,825 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 [2022-11-03 03:56:08,827 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 259 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 717 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 [2022-11-03 03:56:08,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 717 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-03 03:56:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 586. [2022-11-03 03:56:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 580 states have (on average 1.5586206896551724) internal successors, (904), 584 states have internal predecessors, (904), 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) [2022-11-03 03:56:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 909 transitions. [2022-11-03 03:56:08,885 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 909 transitions. Word has length 33 [2022-11-03 03:56:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:08,885 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 909 transitions. [2022-11-03 03:56:08,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-03 03:56:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 909 transitions. [2022-11-03 03:56:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:56:08,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:08,889 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] [2022-11-03 03:56:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:56:08,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2143012570, now seen corresponding path program 1 times [2022-11-03 03:56:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:08,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339057627] [2022-11-03 03:56:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:08,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:08,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339057627] [2022-11-03 03:56:08,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339057627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:08,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:08,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162251699] [2022-11-03 03:56:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:08,978 INFO L87 Difference]: Start difference. First operand 586 states and 909 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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) [2022-11-03 03:56:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:09,173 INFO L93 Difference]: Finished difference Result 1498 states and 2332 transitions. [2022-11-03 03:56:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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 34 [2022-11-03 03:56:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:09,179 INFO L225 Difference]: With dead ends: 1498 [2022-11-03 03:56:09,180 INFO L226 Difference]: Without dead ends: 922 [2022-11-03 03:56:09,181 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 [2022-11-03 03:56:09,183 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 281 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 585 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 [2022-11-03 03:56:09,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 585 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-11-03 03:56:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 911. [2022-11-03 03:56:09,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 905 states have (on average 1.558011049723757) internal successors, (1410), 909 states have internal predecessors, (1410), 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) [2022-11-03 03:56:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1415 transitions. [2022-11-03 03:56:09,239 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1415 transitions. Word has length 34 [2022-11-03 03:56:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:09,240 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1415 transitions. [2022-11-03 03:56:09,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 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) [2022-11-03 03:56:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1415 transitions. [2022-11-03 03:56:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:56:09,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:09,243 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] [2022-11-03 03:56:09,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:56:09,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash 35949807, now seen corresponding path program 1 times [2022-11-03 03:56:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:09,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232589520] [2022-11-03 03:56:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:09,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232589520] [2022-11-03 03:56:09,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232589520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:09,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:09,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114236688] [2022-11-03 03:56:09,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:09,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:09,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:09,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:09,410 INFO L87 Difference]: Start difference. First operand 911 states and 1415 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 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) [2022-11-03 03:56:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:10,218 INFO L93 Difference]: Finished difference Result 3250 states and 5063 transitions. [2022-11-03 03:56:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 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 [2022-11-03 03:56:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:10,229 INFO L225 Difference]: With dead ends: 3250 [2022-11-03 03:56:10,230 INFO L226 Difference]: Without dead ends: 2349 [2022-11-03 03:56:10,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:10,233 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 926 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:10,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 1127 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:56:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2022-11-03 03:56:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1903. [2022-11-03 03:56:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1897 states have (on average 1.5561412756984712) internal successors, (2952), 1901 states have internal predecessors, (2952), 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) [2022-11-03 03:56:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2957 transitions. [2022-11-03 03:56:10,370 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2957 transitions. Word has length 41 [2022-11-03 03:56:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:10,371 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 2957 transitions. [2022-11-03 03:56:10,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 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) [2022-11-03 03:56:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2957 transitions. [2022-11-03 03:56:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:56:10,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:10,374 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] [2022-11-03 03:56:10,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:56:10,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2003633712, now seen corresponding path program 1 times [2022-11-03 03:56:10,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:10,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830126969] [2022-11-03 03:56:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:10,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830126969] [2022-11-03 03:56:10,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830126969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:10,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:10,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579622309] [2022-11-03 03:56:10,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:10,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:10,483 INFO L87 Difference]: Start difference. First operand 1903 states and 2957 transitions. Second operand has 4 states, 4 states have (on average 11.75) 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) [2022-11-03 03:56:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:11,369 INFO L93 Difference]: Finished difference Result 5655 states and 8687 transitions. [2022-11-03 03:56:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) 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 [2022-11-03 03:56:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:11,388 INFO L225 Difference]: With dead ends: 5655 [2022-11-03 03:56:11,389 INFO L226 Difference]: Without dead ends: 3760 [2022-11-03 03:56:11,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:11,402 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 575 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:11,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 789 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:56:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2022-11-03 03:56:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3428. [2022-11-03 03:56:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3422 states have (on average 1.5254237288135593) internal successors, (5220), 3426 states have internal predecessors, (5220), 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) [2022-11-03 03:56:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5225 transitions. [2022-11-03 03:56:11,697 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5225 transitions. Word has length 48 [2022-11-03 03:56:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:11,700 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 5225 transitions. [2022-11-03 03:56:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) 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) [2022-11-03 03:56:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5225 transitions. [2022-11-03 03:56:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 03:56:11,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:11,710 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] [2022-11-03 03:56:11,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:56:11,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1559559623, now seen corresponding path program 1 times [2022-11-03 03:56:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:11,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776532375] [2022-11-03 03:56:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:11,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:11,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776532375] [2022-11-03 03:56:11,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776532375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:11,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:11,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363607843] [2022-11-03 03:56:11,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:11,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:11,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:11,808 INFO L87 Difference]: Start difference. First operand 3428 states and 5225 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) [2022-11-03 03:56:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:12,343 INFO L93 Difference]: Finished difference Result 8157 states and 12398 transitions. [2022-11-03 03:56:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:12,344 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 [2022-11-03 03:56:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:12,364 INFO L225 Difference]: With dead ends: 8157 [2022-11-03 03:56:12,364 INFO L226 Difference]: Without dead ends: 4738 [2022-11-03 03:56:12,373 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 [2022-11-03 03:56:12,380 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 290 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:12,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 504 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-11-03 03:56:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4476. [2022-11-03 03:56:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4470 states have (on average 1.508724832214765) internal successors, (6744), 4474 states have internal predecessors, (6744), 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) [2022-11-03 03:56:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6749 transitions. [2022-11-03 03:56:12,848 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6749 transitions. Word has length 48 [2022-11-03 03:56:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:12,848 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 6749 transitions. [2022-11-03 03:56:12,849 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) [2022-11-03 03:56:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6749 transitions. [2022-11-03 03:56:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 03:56:12,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:12,852 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] [2022-11-03 03:56:12,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:56:12,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:12,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2135847459, now seen corresponding path program 1 times [2022-11-03 03:56:12,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:12,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152840526] [2022-11-03 03:56:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:12,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:12,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:12,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152840526] [2022-11-03 03:56:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152840526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:12,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:12,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:12,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672578007] [2022-11-03 03:56:12,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:12,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:12,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:12,975 INFO L87 Difference]: Start difference. First operand 4476 states and 6749 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-03 03:56:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:13,802 INFO L93 Difference]: Finished difference Result 10858 states and 16379 transitions. [2022-11-03 03:56:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 52 [2022-11-03 03:56:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:13,830 INFO L225 Difference]: With dead ends: 10858 [2022-11-03 03:56:13,830 INFO L226 Difference]: Without dead ends: 6391 [2022-11-03 03:56:13,838 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 [2022-11-03 03:56:13,839 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 202 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 601 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 [2022-11-03 03:56:13,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 601 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:56:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2022-11-03 03:56:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 5191. [2022-11-03 03:56:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 5185 states have (on average 1.452844744455159) internal successors, (7533), 5189 states have internal predecessors, (7533), 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) [2022-11-03 03:56:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7538 transitions. [2022-11-03 03:56:14,267 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7538 transitions. Word has length 52 [2022-11-03 03:56:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:14,267 INFO L495 AbstractCegarLoop]: Abstraction has 5191 states and 7538 transitions. [2022-11-03 03:56:14,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-03 03:56:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7538 transitions. [2022-11-03 03:56:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:56:14,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:14,270 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, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:14,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:56:14,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1432748471, now seen corresponding path program 1 times [2022-11-03 03:56:14,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:14,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861175778] [2022-11-03 03:56:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:14,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:14,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861175778] [2022-11-03 03:56:14,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861175778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:14,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:14,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350835643] [2022-11-03 03:56:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:14,352 INFO L87 Difference]: Start difference. First operand 5191 states and 7538 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-03 03:56:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:15,046 INFO L93 Difference]: Finished difference Result 10248 states and 14910 transitions. [2022-11-03 03:56:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 54 [2022-11-03 03:56:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:15,087 INFO L225 Difference]: With dead ends: 10248 [2022-11-03 03:56:15,087 INFO L226 Difference]: Without dead ends: 5066 [2022-11-03 03:56:15,094 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 [2022-11-03 03:56:15,095 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 275 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 322 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 [2022-11-03 03:56:15,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 322 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2022-11-03 03:56:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 5066. [2022-11-03 03:56:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5060 states have (on average 1.4478260869565218) internal successors, (7326), 5064 states have internal predecessors, (7326), 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) [2022-11-03 03:56:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 7331 transitions. [2022-11-03 03:56:15,531 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 7331 transitions. Word has length 54 [2022-11-03 03:56:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:15,532 INFO L495 AbstractCegarLoop]: Abstraction has 5066 states and 7331 transitions. [2022-11-03 03:56:15,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-03 03:56:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 7331 transitions. [2022-11-03 03:56:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:56:15,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:15,535 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] [2022-11-03 03:56:15,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:56:15,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:15,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1843188569, now seen corresponding path program 1 times [2022-11-03 03:56:15,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:15,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654531571] [2022-11-03 03:56:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:15,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:15,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:15,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654531571] [2022-11-03 03:56:15,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654531571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:15,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:15,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915619067] [2022-11-03 03:56:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:15,650 INFO L87 Difference]: Start difference. First operand 5066 states and 7331 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) [2022-11-03 03:56:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:16,286 INFO L93 Difference]: Finished difference Result 11479 states and 16864 transitions. [2022-11-03 03:56:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:16,287 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 [2022-11-03 03:56:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:16,319 INFO L225 Difference]: With dead ends: 11479 [2022-11-03 03:56:16,319 INFO L226 Difference]: Without dead ends: 6422 [2022-11-03 03:56:16,325 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 [2022-11-03 03:56:16,329 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 252 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 727 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 [2022-11-03 03:56:16,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 727 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6422 states. [2022-11-03 03:56:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6422 to 3989. [2022-11-03 03:56:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3983 states have (on average 1.4757720311323124) internal successors, (5878), 3987 states have internal predecessors, (5878), 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) [2022-11-03 03:56:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 5883 transitions. [2022-11-03 03:56:16,797 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 5883 transitions. Word has length 55 [2022-11-03 03:56:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:16,798 INFO L495 AbstractCegarLoop]: Abstraction has 3989 states and 5883 transitions. [2022-11-03 03:56:16,799 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) [2022-11-03 03:56:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 5883 transitions. [2022-11-03 03:56:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-03 03:56:16,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:16,802 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] [2022-11-03 03:56:16,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:56:16,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1529717714, now seen corresponding path program 1 times [2022-11-03 03:56:16,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:16,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609400642] [2022-11-03 03:56:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:17,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:17,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609400642] [2022-11-03 03:56:17,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609400642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:17,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:17,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:56:17,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379513644] [2022-11-03 03:56:17,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:17,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:56:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:56:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:56:17,009 INFO L87 Difference]: Start difference. First operand 3989 states and 5883 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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) [2022-11-03 03:56:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:20,055 INFO L93 Difference]: Finished difference Result 21913 states and 32316 transitions. [2022-11-03 03:56:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:56:20,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 [2022-11-03 03:56:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:20,126 INFO L225 Difference]: With dead ends: 21913 [2022-11-03 03:56:20,126 INFO L226 Difference]: Without dead ends: 17997 [2022-11-03 03:56:20,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:56:20,138 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1699 mSDsluCounter, 2327 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 2865 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:20,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1699 Valid, 2865 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:56:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17997 states. [2022-11-03 03:56:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17997 to 5447. [2022-11-03 03:56:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5447 states, 5441 states have (on average 1.476199228083073) internal successors, (8032), 5445 states have internal predecessors, (8032), 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) [2022-11-03 03:56:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 8037 transitions. [2022-11-03 03:56:20,962 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 8037 transitions. Word has length 57 [2022-11-03 03:56:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:20,963 INFO L495 AbstractCegarLoop]: Abstraction has 5447 states and 8037 transitions. [2022-11-03 03:56:20,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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) [2022-11-03 03:56:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 8037 transitions. [2022-11-03 03:56:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 03:56:20,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:20,965 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] [2022-11-03 03:56:20,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:56:20,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash -165483554, now seen corresponding path program 1 times [2022-11-03 03:56:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:20,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300221867] [2022-11-03 03:56:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:21,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300221867] [2022-11-03 03:56:21,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300221867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:21,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:21,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:21,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122240705] [2022-11-03 03:56:21,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:21,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:21,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:21,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:21,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:21,082 INFO L87 Difference]: Start difference. First operand 5447 states and 8037 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 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) [2022-11-03 03:56:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:26,061 INFO L93 Difference]: Finished difference Result 34171 states and 50199 transitions. [2022-11-03 03:56:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:56:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 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 [2022-11-03 03:56:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:26,171 INFO L225 Difference]: With dead ends: 34171 [2022-11-03 03:56:26,171 INFO L226 Difference]: Without dead ends: 34168 [2022-11-03 03:56:26,181 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 [2022-11-03 03:56:26,182 INFO L413 NwaCegarLoop]: 1392 mSDtfsCounter, 3160 mSDsluCounter, 5524 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3160 SdHoareTripleChecker+Valid, 6437 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:26,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3160 Valid, 6437 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 03:56:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34168 states. [2022-11-03 03:56:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34168 to 5775. [2022-11-03 03:56:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5769 states have (on average 1.4661119778124458) internal successors, (8458), 5773 states have internal predecessors, (8458), 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) [2022-11-03 03:56:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 8463 transitions. [2022-11-03 03:56:27,442 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 8463 transitions. Word has length 58 [2022-11-03 03:56:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:27,442 INFO L495 AbstractCegarLoop]: Abstraction has 5775 states and 8463 transitions. [2022-11-03 03:56:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 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) [2022-11-03 03:56:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 8463 transitions. [2022-11-03 03:56:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 03:56:27,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:27,445 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] [2022-11-03 03:56:27,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:56:27,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2098199616, now seen corresponding path program 1 times [2022-11-03 03:56:27,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:27,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984185933] [2022-11-03 03:56:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:27,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:27,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984185933] [2022-11-03 03:56:27,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984185933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:27,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:27,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79887371] [2022-11-03 03:56:27,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:27,499 INFO L87 Difference]: Start difference. First operand 5775 states and 8463 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) [2022-11-03 03:56:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:28,354 INFO L93 Difference]: Finished difference Result 12231 states and 17872 transitions. [2022-11-03 03:56:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:28,355 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 [2022-11-03 03:56:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:28,425 INFO L225 Difference]: With dead ends: 12231 [2022-11-03 03:56:28,425 INFO L226 Difference]: Without dead ends: 6474 [2022-11-03 03:56:28,434 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 [2022-11-03 03:56:28,435 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 114 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 608 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 [2022-11-03 03:56:28,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 608 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2022-11-03 03:56:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 5826. [2022-11-03 03:56:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5826 states, 5820 states have (on average 1.463230240549828) internal successors, (8516), 5824 states have internal predecessors, (8516), 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) [2022-11-03 03:56:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5826 states to 5826 states and 8521 transitions. [2022-11-03 03:56:29,871 INFO L78 Accepts]: Start accepts. Automaton has 5826 states and 8521 transitions. Word has length 72 [2022-11-03 03:56:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:29,872 INFO L495 AbstractCegarLoop]: Abstraction has 5826 states and 8521 transitions. [2022-11-03 03:56:29,872 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) [2022-11-03 03:56:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5826 states and 8521 transitions. [2022-11-03 03:56:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 03:56:29,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:29,875 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] [2022-11-03 03:56:29,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:56:29,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1250033493, now seen corresponding path program 1 times [2022-11-03 03:56:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:29,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555144320] [2022-11-03 03:56:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:29,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555144320] [2022-11-03 03:56:29,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555144320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:29,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:29,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86623483] [2022-11-03 03:56:29,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:29,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:29,981 INFO L87 Difference]: Start difference. First operand 5826 states and 8521 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) [2022-11-03 03:56:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:31,791 INFO L93 Difference]: Finished difference Result 13399 states and 19535 transitions. [2022-11-03 03:56:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:31,791 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 [2022-11-03 03:56:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:31,812 INFO L225 Difference]: With dead ends: 13399 [2022-11-03 03:56:31,813 INFO L226 Difference]: Without dead ends: 7583 [2022-11-03 03:56:31,824 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 [2022-11-03 03:56:31,825 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 331 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:31,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 874 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2022-11-03 03:56:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 6722. [2022-11-03 03:56:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6716 states have (on average 1.447885646217987) internal successors, (9724), 6720 states have internal predecessors, (9724), 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) [2022-11-03 03:56:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 9729 transitions. [2022-11-03 03:56:32,859 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 9729 transitions. Word has length 83 [2022-11-03 03:56:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:32,859 INFO L495 AbstractCegarLoop]: Abstraction has 6722 states and 9729 transitions. [2022-11-03 03:56:32,860 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) [2022-11-03 03:56:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 9729 transitions. [2022-11-03 03:56:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 03:56:32,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:32,862 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] [2022-11-03 03:56:32,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:56:32,863 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:32,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:32,864 INFO L85 PathProgramCache]: Analyzing trace with hash 738165683, now seen corresponding path program 1 times [2022-11-03 03:56:32,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:32,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909784066] [2022-11-03 03:56:32,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:32,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909784066] [2022-11-03 03:56:32,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909784066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:32,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:32,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185900578] [2022-11-03 03:56:32,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:32,928 INFO L87 Difference]: Start difference. First operand 6722 states and 9729 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) [2022-11-03 03:56:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:33,507 INFO L93 Difference]: Finished difference Result 9800 states and 14276 transitions. [2022-11-03 03:56:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:33,507 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 [2022-11-03 03:56:33,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:33,514 INFO L225 Difference]: With dead ends: 9800 [2022-11-03 03:56:33,514 INFO L226 Difference]: Without dead ends: 3117 [2022-11-03 03:56:33,524 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 [2022-11-03 03:56:33,525 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 296 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:33,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 436 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2022-11-03 03:56:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3087. [2022-11-03 03:56:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 3081 states have (on average 1.3924050632911393) internal successors, (4290), 3085 states have internal predecessors, (4290), 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) [2022-11-03 03:56:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 4295 transitions. [2022-11-03 03:56:34,063 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 4295 transitions. Word has length 89 [2022-11-03 03:56:34,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:34,063 INFO L495 AbstractCegarLoop]: Abstraction has 3087 states and 4295 transitions. [2022-11-03 03:56:34,064 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) [2022-11-03 03:56:34,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 4295 transitions. [2022-11-03 03:56:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-03 03:56:34,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:34,066 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] [2022-11-03 03:56:34,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:56:34,066 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1253114750, now seen corresponding path program 1 times [2022-11-03 03:56:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:34,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863262100] [2022-11-03 03:56:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:34,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863262100] [2022-11-03 03:56:34,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863262100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:34,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:34,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273543731] [2022-11-03 03:56:34,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:34,163 INFO L87 Difference]: Start difference. First operand 3087 states and 4295 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) [2022-11-03 03:56:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:36,161 INFO L93 Difference]: Finished difference Result 13190 states and 18443 transitions. [2022-11-03 03:56:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:36,162 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 [2022-11-03 03:56:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:36,176 INFO L225 Difference]: With dead ends: 13190 [2022-11-03 03:56:36,176 INFO L226 Difference]: Without dead ends: 10241 [2022-11-03 03:56:36,183 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 [2022-11-03 03:56:36,184 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1377 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:36,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1377 Valid, 2596 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2022-11-03 03:56:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 3089. [2022-11-03 03:56:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3083 states have (on average 1.3882581900746027) internal successors, (4280), 3087 states have internal predecessors, (4280), 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) [2022-11-03 03:56:36,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4285 transitions. [2022-11-03 03:56:36,614 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4285 transitions. Word has length 93 [2022-11-03 03:56:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:36,615 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4285 transitions. [2022-11-03 03:56:36,615 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) [2022-11-03 03:56:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4285 transitions. [2022-11-03 03:56:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 03:56:36,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:36,617 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] [2022-11-03 03:56:36,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 03:56:36,617 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1433914745, now seen corresponding path program 1 times [2022-11-03 03:56:36,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332552623] [2022-11-03 03:56:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:36,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332552623] [2022-11-03 03:56:36,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332552623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728220668] [2022-11-03 03:56:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:36,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:36,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:36,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:36,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:56:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:36,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:56:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:37,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:37,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728220668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:37,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:37,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-03 03:56:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215284895] [2022-11-03 03:56:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:37,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:56:37,121 INFO L87 Difference]: Start difference. First operand 3089 states and 4285 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) [2022-11-03 03:56:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:37,870 INFO L93 Difference]: Finished difference Result 3897 states and 5394 transitions. [2022-11-03 03:56:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:37,871 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 [2022-11-03 03:56:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:37,876 INFO L225 Difference]: With dead ends: 3897 [2022-11-03 03:56:37,877 INFO L226 Difference]: Without dead ends: 3893 [2022-11-03 03:56:37,878 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 [2022-11-03 03:56:37,879 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 197 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:37,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 608 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2022-11-03 03:56:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3804. [2022-11-03 03:56:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3798 states have (on average 1.3915218536071616) internal successors, (5285), 3802 states have internal predecessors, (5285), 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) [2022-11-03 03:56:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 5290 transitions. [2022-11-03 03:56:38,341 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 5290 transitions. Word has length 95 [2022-11-03 03:56:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:38,342 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 5290 transitions. [2022-11-03 03:56:38,342 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) [2022-11-03 03:56:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 5290 transitions. [2022-11-03 03:56:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 03:56:38,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:38,346 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] [2022-11-03 03:56:38,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:56:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:38,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1126778359, now seen corresponding path program 1 times [2022-11-03 03:56:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487541117] [2022-11-03 03:56:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:38,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:38,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487541117] [2022-11-03 03:56:38,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487541117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:38,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886124250] [2022-11-03 03:56:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:38,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:38,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:38,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:56:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:56:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:39,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:39,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886124250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:39,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:39,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-03 03:56:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755189120] [2022-11-03 03:56:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:39,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:39,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:56:39,053 INFO L87 Difference]: Start difference. First operand 3804 states and 5290 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2022-11-03 03:56:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:39,977 INFO L93 Difference]: Finished difference Result 7448 states and 10402 transitions. [2022-11-03 03:56:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 145 [2022-11-03 03:56:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:39,983 INFO L225 Difference]: With dead ends: 7448 [2022-11-03 03:56:39,983 INFO L226 Difference]: Without dead ends: 3804 [2022-11-03 03:56:39,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:56:39,988 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 226 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 329 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 [2022-11-03 03:56:39,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 329 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2022-11-03 03:56:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3804. [2022-11-03 03:56:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3798 states have (on average 1.3599262769878884) internal successors, (5165), 3802 states have internal predecessors, (5165), 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) [2022-11-03 03:56:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 5170 transitions. [2022-11-03 03:56:40,506 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 5170 transitions. Word has length 145 [2022-11-03 03:56:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:40,506 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 5170 transitions. [2022-11-03 03:56:40,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2022-11-03 03:56:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 5170 transitions. [2022-11-03 03:56:40,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 03:56:40,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:40,510 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] [2022-11-03 03:56:40,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:56:40,713 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 261803135, now seen corresponding path program 1 times [2022-11-03 03:56:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843647251] [2022-11-03 03:56:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:56:40,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:40,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843647251] [2022-11-03 03:56:40,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843647251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:40,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:40,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679824369] [2022-11-03 03:56:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:40,807 INFO L87 Difference]: Start difference. First operand 3804 states and 5170 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-03 03:56:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:41,275 INFO L93 Difference]: Finished difference Result 4530 states and 6099 transitions. [2022-11-03 03:56:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 [2022-11-03 03:56:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:41,277 INFO L225 Difference]: With dead ends: 4530 [2022-11-03 03:56:41,277 INFO L226 Difference]: Without dead ends: 752 [2022-11-03 03:56:41,282 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 [2022-11-03 03:56:41,283 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 120 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:41,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 308 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-03 03:56:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 731. [2022-11-03 03:56:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 727 states have (on average 1.123796423658872) internal successors, (817), 729 states have internal predecessors, (817), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 820 transitions. [2022-11-03 03:56:41,519 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 820 transitions. Word has length 148 [2022-11-03 03:56:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:41,520 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 820 transitions. [2022-11-03 03:56:41,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-03 03:56:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 820 transitions. [2022-11-03 03:56:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 03:56:41,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:41,524 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] [2022-11-03 03:56:41,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 03:56:41,524 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:41,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1184671019, now seen corresponding path program 1 times [2022-11-03 03:56:41,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:41,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366964870] [2022-11-03 03:56:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:41,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:41,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366964870] [2022-11-03 03:56:41,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366964870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:41,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586765226] [2022-11-03 03:56:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:41,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:41,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:41,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:41,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:56:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:56:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:56:42,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:42,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586765226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:42,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:42,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-03 03:56:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082716676] [2022-11-03 03:56:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:42,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:42,180 INFO L87 Difference]: Start difference. First operand 731 states and 820 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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) [2022-11-03 03:56:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:42,480 INFO L93 Difference]: Finished difference Result 1077 states and 1211 transitions. [2022-11-03 03:56:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:42,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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 [2022-11-03 03:56:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:42,482 INFO L225 Difference]: With dead ends: 1077 [2022-11-03 03:56:42,483 INFO L226 Difference]: Without dead ends: 612 [2022-11-03 03:56:42,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:56:42,485 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 287 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:42,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 362 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-11-03 03:56:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2022-11-03 03:56:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 608 states have (on average 1.1217105263157894) internal successors, (682), 610 states have internal predecessors, (682), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 685 transitions. [2022-11-03 03:56:42,680 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 685 transitions. Word has length 151 [2022-11-03 03:56:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:42,681 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 685 transitions. [2022-11-03 03:56:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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) [2022-11-03 03:56:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 685 transitions. [2022-11-03 03:56:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:56:42,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:42,684 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:42,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:42,910 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1498559998, now seen corresponding path program 1 times [2022-11-03 03:56:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:42,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63976137] [2022-11-03 03:56:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:42,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:56:43,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:43,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63976137] [2022-11-03 03:56:43,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63976137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:43,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:43,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:56:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113267586] [2022-11-03 03:56:43,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:43,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:43,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:43,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:43,128 INFO L87 Difference]: Start difference. First operand 612 states and 685 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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) [2022-11-03 03:56:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:44,026 INFO L93 Difference]: Finished difference Result 1434 states and 1639 transitions. [2022-11-03 03:56:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:56:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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 [2022-11-03 03:56:44,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:44,028 INFO L225 Difference]: With dead ends: 1434 [2022-11-03 03:56:44,029 INFO L226 Difference]: Without dead ends: 1431 [2022-11-03 03:56:44,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:56:44,030 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 758 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:44,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1531 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:56:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-11-03 03:56:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 611. [2022-11-03 03:56:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 608 states have (on average 1.118421052631579) internal successors, (680), 609 states have internal predecessors, (680), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 682 transitions. [2022-11-03 03:56:44,213 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 682 transitions. Word has length 152 [2022-11-03 03:56:44,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:44,213 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 682 transitions. [2022-11-03 03:56:44,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 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) [2022-11-03 03:56:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 682 transitions. [2022-11-03 03:56:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 03:56:44,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:44,216 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 03:56:44,216 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash 800405642, now seen corresponding path program 1 times [2022-11-03 03:56:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:44,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026173227] [2022-11-03 03:56:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:44,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:56:44,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:44,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026173227] [2022-11-03 03:56:44,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026173227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:44,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:44,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:44,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338074173] [2022-11-03 03:56:44,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:44,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:44,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:44,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:44,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:44,320 INFO L87 Difference]: Start difference. First operand 611 states and 682 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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) [2022-11-03 03:56:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:44,744 INFO L93 Difference]: Finished difference Result 984 states and 1111 transitions. [2022-11-03 03:56:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 153 [2022-11-03 03:56:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:44,746 INFO L225 Difference]: With dead ends: 984 [2022-11-03 03:56:44,747 INFO L226 Difference]: Without dead ends: 867 [2022-11-03 03:56:44,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:44,748 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 382 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:44,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 754 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-03 03:56:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 604. [2022-11-03 03:56:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 602 states have (on average 1.1096345514950166) internal successors, (668), 602 states have internal predecessors, (668), 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) [2022-11-03 03:56:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 669 transitions. [2022-11-03 03:56:44,863 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 669 transitions. Word has length 153 [2022-11-03 03:56:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:44,864 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 669 transitions. [2022-11-03 03:56:44,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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) [2022-11-03 03:56:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 669 transitions. [2022-11-03 03:56:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 03:56:44,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:44,868 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:44,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 03:56:44,869 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1669771682, now seen corresponding path program 1 times [2022-11-03 03:56:44,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:44,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720537638] [2022-11-03 03:56:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:46,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720537638] [2022-11-03 03:56:46,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720537638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900896813] [2022-11-03 03:56:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:46,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:46,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:46,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:46,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_703e1344-7459-41a9-b005-dc5a59aa0c9b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:56:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:56:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:47,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:48,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900896813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:48,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085680329] [2022-11-03 03:56:48,138 INFO L159 IcfgInterpreter]: Started Sifa with 156 locations of interest [2022-11-03 03:56:48,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:56:48,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:56:48,153 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:56:48,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs