./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF --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 2218bd3b5024885ce258db0decccc6cd77d5db224efd54b84e54987ad5abfa77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:07:59,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:07:59,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:07:59,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:07:59,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:07:59,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:07:59,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:07:59,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:07:59,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:07:59,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:07:59,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:07:59,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:07:59,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:07:59,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:07:59,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:07:59,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:07:59,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:07:59,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:07:59,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:07:59,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:07:59,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:07:59,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:07:59,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:07:59,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:07:59,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:07:59,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:07:59,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:07:59,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:07:59,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:07:59,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:07:59,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:07:59,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:07:59,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:07:59,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:07:59,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:07:59,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:07:59,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:07:59,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:07:59,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:07:59,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:07:59,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:07:59,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:07:59,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:07:59,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:07:59,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:07:59,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:07:59,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:07:59,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:07:59,627 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:07:59,627 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:07:59,627 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:07:59,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:07:59,628 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:07:59,628 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:07:59,629 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:07:59,629 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:07:59,629 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:07:59,630 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:07:59,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:07:59,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:07:59,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:07:59,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:07:59,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:07:59,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:07:59,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:07:59,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:07:59,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:07:59,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:07:59,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:07:59,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:07:59,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:07:59,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:07:59,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:07:59,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:07:59,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:07:59,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:07:59,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:07:59,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:07:59,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:07:59,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:07:59,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:07:59,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:07:59,639 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2218bd3b5024885ce258db0decccc6cd77d5db224efd54b84e54987ad5abfa77 [2021-11-12 23:08:00,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:08:00,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:08:00,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:08:00,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:08:00,093 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:08:00,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:08:00,190 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/data/1ac874020/ff7f346eff1247f6b31e5db300ec4080/FLAG6fa281837 [2021-11-12 23:08:00,900 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:08:00,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:08:00,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/data/1ac874020/ff7f346eff1247f6b31e5db300ec4080/FLAG6fa281837 [2021-11-12 23:08:01,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/data/1ac874020/ff7f346eff1247f6b31e5db300ec4080 [2021-11-12 23:08:01,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:08:01,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:08:01,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:01,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:08:01,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:08:01,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d76de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:01, skipping insertion in model container [2021-11-12 23:08:01,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:08:01" (1/1) ... [2021-11-12 23:08:01,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:08:01,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:08:01,687 WARN L228 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_68086a41-f1f9-4fbe-9aab-126445d35cee/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-12 23:08:01,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:01,836 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:08:01,936 WARN L228 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_68086a41-f1f9-4fbe-9aab-126445d35cee/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7107,7120] [2021-11-12 23:08:02,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:08:02,057 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:08:02,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02 WrapperNode [2021-11-12 23:08:02,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:08:02,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:02,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:08:02,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:08:02,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:08:02,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:08:02,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:08:02,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:08:02,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:08:02,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:08:02,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:08:02,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:08:02,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (1/1) ... [2021-11-12 23:08:02,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:08:02,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:08:02,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:08:02,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:08:02,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:08:02,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:08:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:08:02,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:08:03,668 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:08:03,668 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:08:03,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:03 BoogieIcfgContainer [2021-11-12 23:08:03,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:08:03,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:08:03,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:08:03,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:08:03,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:08:01" (1/3) ... [2021-11-12 23:08:03,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e46a9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:03, skipping insertion in model container [2021-11-12 23:08:03,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:08:02" (2/3) ... [2021-11-12 23:08:03,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e46a9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:08:03, skipping insertion in model container [2021-11-12 23:08:03,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:08:03" (3/3) ... [2021-11-12 23:08:03,682 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:08:03,689 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:08:03,690 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:08:03,757 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:08:03,774 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:08:03,774 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:08:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-12 23:08:03,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:03,830 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:03,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash -958737111, now seen corresponding path program 1 times [2021-11-12 23:08:03,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:03,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051263671] [2021-11-12 23:08:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:03,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:04,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:04,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051263671] [2021-11-12 23:08:04,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051263671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:04,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:04,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:08:04,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773406876] [2021-11-12 23:08:04,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:04,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:08:04,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:08:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:04,586 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7054263565891472) internal successors, (220), 130 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:04,936 INFO L93 Difference]: Finished difference Result 395 states and 633 transitions. [2021-11-12 23:08:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:08:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-12 23:08:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:04,965 INFO L225 Difference]: With dead ends: 395 [2021-11-12 23:08:04,965 INFO L226 Difference]: Without dead ends: 315 [2021-11-12 23:08:04,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:08:04,981 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 683 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.86ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:04,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 774 Invalid, 133 Unknown, 0 Unchecked, 11.86ms Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 229.32ms Time] [2021-11-12 23:08:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-12 23:08:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2021-11-12 23:08:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.396103896103896) internal successors, (430), 308 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 430 transitions. [2021-11-12 23:08:05,070 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 430 transitions. Word has length 53 [2021-11-12 23:08:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:05,071 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 430 transitions. [2021-11-12 23:08:05,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 430 transitions. [2021-11-12 23:08:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:08:05,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:05,075 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:05,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:08:05,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:05,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1462812193, now seen corresponding path program 1 times [2021-11-12 23:08:05,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:05,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566500315] [2021-11-12 23:08:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:05,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:05,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:05,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566500315] [2021-11-12 23:08:05,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566500315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:05,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:05,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:08:05,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041401287] [2021-11-12 23:08:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:05,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:05,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:05,255 INFO L87 Difference]: Start difference. First operand 309 states and 430 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:05,590 INFO L93 Difference]: Finished difference Result 739 states and 1060 transitions. [2021-11-12 23:08:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-12 23:08:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:05,595 INFO L225 Difference]: With dead ends: 739 [2021-11-12 23:08:05,596 INFO L226 Difference]: Without dead ends: 479 [2021-11-12 23:08:05,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:05,609 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 458 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.85ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:05,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 182 Invalid, 177 Unknown, 0 Unchecked, 4.85ms Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 218.71ms Time] [2021-11-12 23:08:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-12 23:08:05,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2021-11-12 23:08:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.4285714285714286) internal successors, (680), 476 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 680 transitions. [2021-11-12 23:08:05,724 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 680 transitions. Word has length 54 [2021-11-12 23:08:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:05,727 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 680 transitions. [2021-11-12 23:08:05,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 680 transitions. [2021-11-12 23:08:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:08:05,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:05,743 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:05,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:08:05,743 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash -508331265, now seen corresponding path program 1 times [2021-11-12 23:08:05,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:05,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343058913] [2021-11-12 23:08:05,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:05,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:05,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:05,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343058913] [2021-11-12 23:08:05,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343058913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:05,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:05,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:08:05,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844485468] [2021-11-12 23:08:05,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:05,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:05,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:05,923 INFO L87 Difference]: Start difference. First operand 477 states and 680 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:06,243 INFO L93 Difference]: Finished difference Result 1193 states and 1746 transitions. [2021-11-12 23:08:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-12 23:08:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,249 INFO L225 Difference]: With dead ends: 1193 [2021-11-12 23:08:06,250 INFO L226 Difference]: Without dead ends: 815 [2021-11-12 23:08:06,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:06,262 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 430 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 208.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 198 Invalid, 173 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 208.74ms Time] [2021-11-12 23:08:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-11-12 23:08:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 813. [2021-11-12 23:08:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.4532019704433496) internal successors, (1180), 812 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1180 transitions. [2021-11-12 23:08:06,365 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1180 transitions. Word has length 54 [2021-11-12 23:08:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:06,367 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1180 transitions. [2021-11-12 23:08:06,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1180 transitions. [2021-11-12 23:08:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:08:06,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:06,369 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:06,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:08:06,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1756392304, now seen corresponding path program 1 times [2021-11-12 23:08:06,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:06,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230003875] [2021-11-12 23:08:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:06,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:06,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:06,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230003875] [2021-11-12 23:08:06,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230003875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:06,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:06,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:08:06,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022490918] [2021-11-12 23:08:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:06,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:06,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:06,495 INFO L87 Difference]: Start difference. First operand 813 states and 1180 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:06,905 INFO L93 Difference]: Finished difference Result 2228 states and 3287 transitions. [2021-11-12 23:08:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-12 23:08:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:06,916 INFO L225 Difference]: With dead ends: 2228 [2021-11-12 23:08:06,916 INFO L226 Difference]: Without dead ends: 1487 [2021-11-12 23:08:06,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:06,919 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 435 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:06,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 190 Invalid, 172 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 188.68ms Time] [2021-11-12 23:08:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-11-12 23:08:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1485. [2021-11-12 23:08:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 1.463611859838275) internal successors, (2172), 1484 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2172 transitions. [2021-11-12 23:08:07,080 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2172 transitions. Word has length 54 [2021-11-12 23:08:07,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,080 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 2172 transitions. [2021-11-12 23:08:07,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2172 transitions. [2021-11-12 23:08:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 23:08:07,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,082 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:07,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:08:07,082 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1769599762, now seen corresponding path program 1 times [2021-11-12 23:08:07,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265284454] [2021-11-12 23:08:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:07,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:07,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265284454] [2021-11-12 23:08:07,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265284454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:07,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:07,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:08:07,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890193414] [2021-11-12 23:08:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:07,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:08:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:08:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:08:07,141 INFO L87 Difference]: Start difference. First operand 1485 states and 2172 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:07,571 INFO L93 Difference]: Finished difference Result 3995 states and 5884 transitions. [2021-11-12 23:08:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:08:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-12 23:08:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:07,586 INFO L225 Difference]: With dead ends: 3995 [2021-11-12 23:08:07,586 INFO L226 Difference]: Without dead ends: 2543 [2021-11-12 23:08:07,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:08:07,590 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 451 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 140.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:07,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 174 Invalid, 172 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 140.78ms Time] [2021-11-12 23:08:07,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2021-11-12 23:08:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2541. [2021-11-12 23:08:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 1.4559055118110236) internal successors, (3698), 2540 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3698 transitions. [2021-11-12 23:08:07,888 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3698 transitions. Word has length 54 [2021-11-12 23:08:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:07,888 INFO L470 AbstractCegarLoop]: Abstraction has 2541 states and 3698 transitions. [2021-11-12 23:08:07,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3698 transitions. [2021-11-12 23:08:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:08:07,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:07,890 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:07,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:08:07,890 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash 863065853, now seen corresponding path program 1 times [2021-11-12 23:08:07,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:07,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577223269] [2021-11-12 23:08:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:07,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:08,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:08,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577223269] [2021-11-12 23:08:08,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577223269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:08,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:08,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-12 23:08:08,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475504306] [2021-11-12 23:08:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:08,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:08:08,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:08:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:08:08,569 INFO L87 Difference]: Start difference. First operand 2541 states and 3698 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:09,842 INFO L93 Difference]: Finished difference Result 5873 states and 8552 transitions. [2021-11-12 23:08:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:08:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-12 23:08:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:09,870 INFO L225 Difference]: With dead ends: 5873 [2021-11-12 23:08:09,871 INFO L226 Difference]: Without dead ends: 4383 [2021-11-12 23:08:09,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:08:09,878 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 600 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 372.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.15ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 449.36ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:09,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 1281 Invalid, 473 Unknown, 0 Unchecked, 8.15ms Time], IncrementalHoareTripleChecker [23 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 449.36ms Time] [2021-11-12 23:08:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-11-12 23:08:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 3539. [2021-11-12 23:08:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 3538 states have (on average 1.4451667608818541) internal successors, (5113), 3538 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 5113 transitions. [2021-11-12 23:08:10,350 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 5113 transitions. Word has length 55 [2021-11-12 23:08:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:10,351 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 5113 transitions. [2021-11-12 23:08:10,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 5113 transitions. [2021-11-12 23:08:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:08:10,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:10,353 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:10,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:08:10,353 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:10,354 INFO L85 PathProgramCache]: Analyzing trace with hash -487389507, now seen corresponding path program 1 times [2021-11-12 23:08:10,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:10,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166256025] [2021-11-12 23:08:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:10,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:11,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:11,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166256025] [2021-11-12 23:08:11,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166256025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:11,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:11,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-12 23:08:11,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590857445] [2021-11-12 23:08:11,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:11,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:08:11,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:11,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:08:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:08:11,081 INFO L87 Difference]: Start difference. First operand 3539 states and 5113 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:12,335 INFO L93 Difference]: Finished difference Result 4149 states and 5982 transitions. [2021-11-12 23:08:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:08:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-12 23:08:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:12,360 INFO L225 Difference]: With dead ends: 4149 [2021-11-12 23:08:12,360 INFO L226 Difference]: Without dead ends: 4147 [2021-11-12 23:08:12,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:12,363 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 531 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 487.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.85ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 578.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:12,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 1583 Invalid, 541 Unknown, 0 Unchecked, 11.85ms Time], IncrementalHoareTripleChecker [19 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 578.43ms Time] [2021-11-12 23:08:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-11-12 23:08:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3943. [2021-11-12 23:08:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 1.4429223744292237) internal successors, (5688), 3942 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5688 transitions. [2021-11-12 23:08:12,835 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5688 transitions. Word has length 55 [2021-11-12 23:08:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:12,837 INFO L470 AbstractCegarLoop]: Abstraction has 3943 states and 5688 transitions. [2021-11-12 23:08:12,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5688 transitions. [2021-11-12 23:08:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:08:12,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:12,839 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:12,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:08:12,839 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:12,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash 328305373, now seen corresponding path program 1 times [2021-11-12 23:08:12,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:12,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157628508] [2021-11-12 23:08:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:12,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:13,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:13,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157628508] [2021-11-12 23:08:13,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157628508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:13,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:13,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-12 23:08:13,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684045001] [2021-11-12 23:08:13,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:13,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:08:13,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:13,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:08:13,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:08:13,532 INFO L87 Difference]: Start difference. First operand 3943 states and 5688 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:15,177 INFO L93 Difference]: Finished difference Result 5947 states and 8576 transitions. [2021-11-12 23:08:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:08:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-12 23:08:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:15,206 INFO L225 Difference]: With dead ends: 5947 [2021-11-12 23:08:15,206 INFO L226 Difference]: Without dead ends: 5161 [2021-11-12 23:08:15,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:15,212 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 554 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 644.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.12ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 816.97ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:15,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 1812 Invalid, 785 Unknown, 0 Unchecked, 53.12ms Time], IncrementalHoareTripleChecker [19 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 816.97ms Time] [2021-11-12 23:08:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-11-12 23:08:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4647. [2021-11-12 23:08:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4646 states have (on average 1.4408092983211365) internal successors, (6694), 4646 states have internal predecessors, (6694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 6694 transitions. [2021-11-12 23:08:15,720 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 6694 transitions. Word has length 55 [2021-11-12 23:08:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:15,721 INFO L470 AbstractCegarLoop]: Abstraction has 4647 states and 6694 transitions. [2021-11-12 23:08:15,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 6694 transitions. [2021-11-12 23:08:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 23:08:15,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:15,722 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:15,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:08:15,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1489136413, now seen corresponding path program 1 times [2021-11-12 23:08:15,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:15,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003808997] [2021-11-12 23:08:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:15,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:16,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:16,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003808997] [2021-11-12 23:08:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003808997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:16,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:16,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-12 23:08:16,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461207205] [2021-11-12 23:08:16,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:16,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 23:08:16,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 23:08:16,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:08:16,233 INFO L87 Difference]: Start difference. First operand 4647 states and 6694 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:17,685 INFO L93 Difference]: Finished difference Result 8354 states and 12107 transitions. [2021-11-12 23:08:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 23:08:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-12 23:08:17,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:17,746 INFO L225 Difference]: With dead ends: 8354 [2021-11-12 23:08:17,746 INFO L226 Difference]: Without dead ends: 8352 [2021-11-12 23:08:17,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:17,751 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 536 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 443.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.68ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 522.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:17,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 1950 Invalid, 539 Unknown, 0 Unchecked, 12.68ms Time], IncrementalHoareTripleChecker [16 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 522.88ms Time] [2021-11-12 23:08:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-11-12 23:08:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 6680. [2021-11-12 23:08:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6680 states, 6679 states have (on average 1.4443779008833657) internal successors, (9647), 6679 states have internal predecessors, (9647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6680 states to 6680 states and 9647 transitions. [2021-11-12 23:08:18,535 INFO L78 Accepts]: Start accepts. Automaton has 6680 states and 9647 transitions. Word has length 55 [2021-11-12 23:08:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:18,535 INFO L470 AbstractCegarLoop]: Abstraction has 6680 states and 9647 transitions. [2021-11-12 23:08:18,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6680 states and 9647 transitions. [2021-11-12 23:08:18,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:08:18,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:18,537 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:18,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:08:18,538 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2081397871, now seen corresponding path program 1 times [2021-11-12 23:08:18,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:18,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646262946] [2021-11-12 23:08:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:18,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:19,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:19,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646262946] [2021-11-12 23:08:19,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646262946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:19,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:19,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 23:08:19,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571316571] [2021-11-12 23:08:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:19,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:08:19,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:08:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:08:19,577 INFO L87 Difference]: Start difference. First operand 6680 states and 9647 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:22,150 INFO L93 Difference]: Finished difference Result 7695 states and 11090 transitions. [2021-11-12 23:08:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:08:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:08:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:22,176 INFO L225 Difference]: With dead ends: 7695 [2021-11-12 23:08:22,176 INFO L226 Difference]: Without dead ends: 7693 [2021-11-12 23:08:22,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:08:22,181 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 827 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1193.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.56ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1413.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:22,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1430 Invalid, 1830 Unknown, 0 Unchecked, 10.56ms Time], IncrementalHoareTripleChecker [30 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 1413.22ms Time] [2021-11-12 23:08:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-11-12 23:08:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6689. [2021-11-12 23:08:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6689 states, 6688 states have (on average 1.444078947368421) internal successors, (9658), 6688 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6689 states to 6689 states and 9658 transitions. [2021-11-12 23:08:23,016 INFO L78 Accepts]: Start accepts. Automaton has 6689 states and 9658 transitions. Word has length 57 [2021-11-12 23:08:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:23,017 INFO L470 AbstractCegarLoop]: Abstraction has 6689 states and 9658 transitions. [2021-11-12 23:08:23,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 6689 states and 9658 transitions. [2021-11-12 23:08:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:08:23,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:23,019 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:23,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:08:23,020 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1265702991, now seen corresponding path program 1 times [2021-11-12 23:08:23,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:23,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097340150] [2021-11-12 23:08:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:23,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:23,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:23,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097340150] [2021-11-12 23:08:23,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097340150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:23,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:23,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-12 23:08:23,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450634880] [2021-11-12 23:08:23,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:23,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:08:23,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:08:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:08:23,797 INFO L87 Difference]: Start difference. First operand 6689 states and 9658 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:25,031 INFO L93 Difference]: Finished difference Result 8697 states and 12550 transitions. [2021-11-12 23:08:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:08:25,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:08:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:25,054 INFO L225 Difference]: With dead ends: 8697 [2021-11-12 23:08:25,054 INFO L226 Difference]: Without dead ends: 7911 [2021-11-12 23:08:25,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:08:25,060 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 679 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 307.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:25,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1251 Invalid, 420 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [23 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 374.16ms Time] [2021-11-12 23:08:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7911 states. [2021-11-12 23:08:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7911 to 6686. [2021-11-12 23:08:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6686 states, 6685 states have (on average 1.444128646222887) internal successors, (9654), 6685 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6686 states to 6686 states and 9654 transitions. [2021-11-12 23:08:25,771 INFO L78 Accepts]: Start accepts. Automaton has 6686 states and 9654 transitions. Word has length 57 [2021-11-12 23:08:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:25,771 INFO L470 AbstractCegarLoop]: Abstraction has 6686 states and 9654 transitions. [2021-11-12 23:08:25,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6686 states and 9654 transitions. [2021-11-12 23:08:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:08:25,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:25,773 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:08:25,774 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -590143631, now seen corresponding path program 1 times [2021-11-12 23:08:25,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:25,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701244893] [2021-11-12 23:08:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:25,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:26,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:26,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701244893] [2021-11-12 23:08:26,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701244893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:26,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:26,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-12 23:08:26,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475742045] [2021-11-12 23:08:26,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:26,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:08:26,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:08:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:08:26,485 INFO L87 Difference]: Start difference. First operand 6686 states and 9654 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:28,144 INFO L93 Difference]: Finished difference Result 7713 states and 11109 transitions. [2021-11-12 23:08:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:08:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:08:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:28,174 INFO L225 Difference]: With dead ends: 7713 [2021-11-12 23:08:28,174 INFO L226 Difference]: Without dead ends: 7711 [2021-11-12 23:08:28,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:08:28,180 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 610 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 508.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.98ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 617.35ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:28,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 1372 Invalid, 587 Unknown, 0 Unchecked, 5.98ms Time], IncrementalHoareTripleChecker [17 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 617.35ms Time] [2021-11-12 23:08:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7711 states. [2021-11-12 23:08:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7711 to 6699. [2021-11-12 23:08:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6699 states, 6698 states have (on average 1.4437145416542252) internal successors, (9670), 6698 states have internal predecessors, (9670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6699 states to 6699 states and 9670 transitions. [2021-11-12 23:08:29,039 INFO L78 Accepts]: Start accepts. Automaton has 6699 states and 9670 transitions. Word has length 57 [2021-11-12 23:08:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:29,040 INFO L470 AbstractCegarLoop]: Abstraction has 6699 states and 9670 transitions. [2021-11-12 23:08:29,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 6699 states and 9670 transitions. [2021-11-12 23:08:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:08:29,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:29,043 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:29,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:08:29,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -372555791, now seen corresponding path program 1 times [2021-11-12 23:08:29,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:29,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565690631] [2021-11-12 23:08:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:29,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:29,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:29,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565690631] [2021-11-12 23:08:29,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565690631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:29,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:29,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-12 23:08:29,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145744579] [2021-11-12 23:08:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:29,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 23:08:29,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 23:08:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:08:29,766 INFO L87 Difference]: Start difference. First operand 6699 states and 9670 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:31,417 INFO L93 Difference]: Finished difference Result 10075 states and 14524 transitions. [2021-11-12 23:08:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:08:31,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:08:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:31,435 INFO L225 Difference]: With dead ends: 10075 [2021-11-12 23:08:31,435 INFO L226 Difference]: Without dead ends: 10073 [2021-11-12 23:08:31,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:08:31,439 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 537 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 549.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.65ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 644.95ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:31,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 1190 Invalid, 659 Unknown, 0 Unchecked, 6.65ms Time], IncrementalHoareTripleChecker [20 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 644.95ms Time] [2021-11-12 23:08:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10073 states. [2021-11-12 23:08:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10073 to 6712. [2021-11-12 23:08:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 1.4431530323349724) internal successors, (9685), 6711 states have internal predecessors, (9685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 9685 transitions. [2021-11-12 23:08:32,286 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 9685 transitions. Word has length 57 [2021-11-12 23:08:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:32,286 INFO L470 AbstractCegarLoop]: Abstraction has 6712 states and 9685 transitions. [2021-11-12 23:08:32,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 9685 transitions. [2021-11-12 23:08:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:08:32,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:32,288 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:32,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 23:08:32,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:32,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1723011151, now seen corresponding path program 1 times [2021-11-12 23:08:32,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:32,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264735565] [2021-11-12 23:08:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:32,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:33,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:33,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264735565] [2021-11-12 23:08:33,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264735565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:33,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:33,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 23:08:33,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034761630] [2021-11-12 23:08:33,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:33,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:08:33,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:33,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:08:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:08:33,542 INFO L87 Difference]: Start difference. First operand 6712 states and 9685 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:36,599 INFO L93 Difference]: Finished difference Result 7347 states and 10578 transitions. [2021-11-12 23:08:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:08:36,600 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:08:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:36,616 INFO L225 Difference]: With dead ends: 7347 [2021-11-12 23:08:36,617 INFO L226 Difference]: Without dead ends: 7345 [2021-11-12 23:08:36,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:08:36,621 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 732 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1209.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.21ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1430.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:36,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 1446 Invalid, 1909 Unknown, 0 Unchecked, 9.21ms Time], IncrementalHoareTripleChecker [23 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 1430.73ms Time] [2021-11-12 23:08:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-11-12 23:08:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 6712. [2021-11-12 23:08:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 1.4431530323349724) internal successors, (9685), 6711 states have internal predecessors, (9685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 9685 transitions. [2021-11-12 23:08:37,612 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 9685 transitions. Word has length 57 [2021-11-12 23:08:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 6712 states and 9685 transitions. [2021-11-12 23:08:37,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 9685 transitions. [2021-11-12 23:08:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-12 23:08:37,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:37,616 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:37,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:08:37,617 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash -907316271, now seen corresponding path program 1 times [2021-11-12 23:08:37,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:37,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726136657] [2021-11-12 23:08:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:37,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:38,689 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726136657] [2021-11-12 23:08:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726136657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:38,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:38,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-12 23:08:38,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055857145] [2021-11-12 23:08:38,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:38,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 23:08:38,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:38,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 23:08:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:08:38,691 INFO L87 Difference]: Start difference. First operand 6712 states and 9685 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:41,365 INFO L93 Difference]: Finished difference Result 10807 states and 15566 transitions. [2021-11-12 23:08:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:08:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-12 23:08:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:41,390 INFO L225 Difference]: With dead ends: 10807 [2021-11-12 23:08:41,391 INFO L226 Difference]: Without dead ends: 10805 [2021-11-12 23:08:41,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 23:08:41,398 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 883 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 999.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.16ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1204.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:41,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 1393 Invalid, 1519 Unknown, 0 Unchecked, 9.16ms Time], IncrementalHoareTripleChecker [22 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1204.05ms Time] [2021-11-12 23:08:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10805 states. [2021-11-12 23:08:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10805 to 6731. [2021-11-12 23:08:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6731 states, 6730 states have (on average 1.4423476968796434) internal successors, (9707), 6730 states have internal predecessors, (9707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6731 states to 6731 states and 9707 transitions. [2021-11-12 23:08:42,182 INFO L78 Accepts]: Start accepts. Automaton has 6731 states and 9707 transitions. Word has length 57 [2021-11-12 23:08:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:42,182 INFO L470 AbstractCegarLoop]: Abstraction has 6731 states and 9707 transitions. [2021-11-12 23:08:42,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6731 states and 9707 transitions. [2021-11-12 23:08:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:08:42,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:42,184 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:08:42,184 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 593687310, now seen corresponding path program 1 times [2021-11-12 23:08:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:42,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995445804] [2021-11-12 23:08:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:42,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:42,238 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:42,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995445804] [2021-11-12 23:08:42,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995445804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:42,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:42,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:42,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059735076] [2021-11-12 23:08:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:42,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:42,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:42,243 INFO L87 Difference]: Start difference. First operand 6731 states and 9707 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:42,851 INFO L93 Difference]: Finished difference Result 11930 states and 17264 transitions. [2021-11-12 23:08:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:42,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:08:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:42,863 INFO L225 Difference]: With dead ends: 11930 [2021-11-12 23:08:42,864 INFO L226 Difference]: Without dead ends: 6632 [2021-11-12 23:08:42,876 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:08:42,877 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 108 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:42,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 296 Invalid, 42 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 48.21ms Time] [2021-11-12 23:08:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2021-11-12 23:08:43,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 6514. [2021-11-12 23:08:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 1.4398894518654997) internal successors, (9378), 6513 states have internal predecessors, (9378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 9378 transitions. [2021-11-12 23:08:43,600 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 9378 transitions. Word has length 58 [2021-11-12 23:08:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:43,601 INFO L470 AbstractCegarLoop]: Abstraction has 6514 states and 9378 transitions. [2021-11-12 23:08:43,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 9378 transitions. [2021-11-12 23:08:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:08:43,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:43,603 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:43,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:08:43,604 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1651164897, now seen corresponding path program 1 times [2021-11-12 23:08:43,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:43,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032463119] [2021-11-12 23:08:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:43,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:43,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:43,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032463119] [2021-11-12 23:08:43,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032463119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:43,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:43,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:43,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145212890] [2021-11-12 23:08:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:43,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:43,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:43,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:43,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:43,645 INFO L87 Difference]: Start difference. First operand 6514 states and 9378 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:44,335 INFO L93 Difference]: Finished difference Result 11082 states and 16006 transitions. [2021-11-12 23:08:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:08:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:44,347 INFO L225 Difference]: With dead ends: 11082 [2021-11-12 23:08:44,347 INFO L226 Difference]: Without dead ends: 6227 [2021-11-12 23:08:44,355 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:08:44,356 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 115 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.38ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:44,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 280 Invalid, 45 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 55.38ms Time] [2021-11-12 23:08:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6227 states. [2021-11-12 23:08:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6227 to 6225. [2021-11-12 23:08:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6225 states, 6224 states have (on average 1.4375) internal successors, (8947), 6224 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 8947 transitions. [2021-11-12 23:08:45,137 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 8947 transitions. Word has length 58 [2021-11-12 23:08:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:45,138 INFO L470 AbstractCegarLoop]: Abstraction has 6225 states and 8947 transitions. [2021-11-12 23:08:45,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 8947 transitions. [2021-11-12 23:08:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:08:45,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:45,140 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:45,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 23:08:45,141 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:45,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 192578676, now seen corresponding path program 1 times [2021-11-12 23:08:45,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:45,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695667157] [2021-11-12 23:08:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:45,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:45,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:45,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695667157] [2021-11-12 23:08:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695667157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:45,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:45,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:45,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904735815] [2021-11-12 23:08:45,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:45,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:45,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:45,190 INFO L87 Difference]: Start difference. First operand 6225 states and 8947 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:46,163 INFO L93 Difference]: Finished difference Result 10520 states and 15183 transitions. [2021-11-12 23:08:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:08:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:46,179 INFO L225 Difference]: With dead ends: 10520 [2021-11-12 23:08:46,180 INFO L226 Difference]: Without dead ends: 5983 [2021-11-12 23:08:46,191 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:08:46,192 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 106 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:46,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 280 Invalid, 44 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 55.30ms Time] [2021-11-12 23:08:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2021-11-12 23:08:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 5981. [2021-11-12 23:08:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5981 states, 5980 states have (on average 1.43561872909699) internal successors, (8585), 5980 states have internal predecessors, (8585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5981 states to 5981 states and 8585 transitions. [2021-11-12 23:08:46,889 INFO L78 Accepts]: Start accepts. Automaton has 5981 states and 8585 transitions. Word has length 58 [2021-11-12 23:08:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:46,890 INFO L470 AbstractCegarLoop]: Abstraction has 5981 states and 8585 transitions. [2021-11-12 23:08:46,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5981 states and 8585 transitions. [2021-11-12 23:08:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-12 23:08:46,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:46,892 INFO L514 BasicCegarLoop]: 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] [2021-11-12 23:08:46,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 23:08:46,893 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1889469329, now seen corresponding path program 1 times [2021-11-12 23:08:46,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:46,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645509309] [2021-11-12 23:08:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:46,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:46,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:46,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645509309] [2021-11-12 23:08:46,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645509309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:46,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:46,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:08:46,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097797436] [2021-11-12 23:08:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:46,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:08:46,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:08:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:08:46,946 INFO L87 Difference]: Start difference. First operand 5981 states and 8585 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:47,777 INFO L93 Difference]: Finished difference Result 10218 states and 14736 transitions. [2021-11-12 23:08:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:08:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-12 23:08:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:47,788 INFO L225 Difference]: With dead ends: 10218 [2021-11-12 23:08:47,788 INFO L226 Difference]: Without dead ends: 5734 [2021-11-12 23:08:47,795 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:08:47,796 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 99 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:47,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 280 Invalid, 43 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 62.05ms Time] [2021-11-12 23:08:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2021-11-12 23:08:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 5732. [2021-11-12 23:08:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 5731 states have (on average 1.4351771069621357) internal successors, (8225), 5731 states have internal predecessors, (8225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 8225 transitions. [2021-11-12 23:08:48,291 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 8225 transitions. Word has length 58 [2021-11-12 23:08:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:48,291 INFO L470 AbstractCegarLoop]: Abstraction has 5732 states and 8225 transitions. [2021-11-12 23:08:48,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 8225 transitions. [2021-11-12 23:08:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:08:48,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:48,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:48,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 23:08:48,293 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 871143237, now seen corresponding path program 1 times [2021-11-12 23:08:48,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:48,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552880097] [2021-11-12 23:08:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:48,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:50,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:50,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552880097] [2021-11-12 23:08:50,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552880097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:50,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:50,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-12 23:08:50,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393720866] [2021-11-12 23:08:50,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:50,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:08:50,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:08:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:50,065 INFO L87 Difference]: Start difference. First operand 5732 states and 8225 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:52,738 INFO L93 Difference]: Finished difference Result 6282 states and 8997 transitions. [2021-11-12 23:08:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:08:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:08:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:52,747 INFO L225 Difference]: With dead ends: 6282 [2021-11-12 23:08:52,747 INFO L226 Difference]: Without dead ends: 6280 [2021-11-12 23:08:52,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 23:08:52,750 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 751 mSDsluCounter, 1636 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 788.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.96ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 962.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:52,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 1847 Invalid, 1247 Unknown, 0 Unchecked, 6.96ms Time], IncrementalHoareTripleChecker [34 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 962.66ms Time] [2021-11-12 23:08:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2021-11-12 23:08:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6080. [2021-11-12 23:08:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 6079 states have (on average 1.4339529527882875) internal successors, (8717), 6079 states have internal predecessors, (8717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 8717 transitions. [2021-11-12 23:08:53,334 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 8717 transitions. Word has length 59 [2021-11-12 23:08:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:08:53,334 INFO L470 AbstractCegarLoop]: Abstraction has 6080 states and 8717 transitions. [2021-11-12 23:08:53,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 8717 transitions. [2021-11-12 23:08:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:08:53,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:08:53,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:08:53,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-12 23:08:53,336 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:08:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:08:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 192143237, now seen corresponding path program 1 times [2021-11-12 23:08:53,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:08:53,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431163513] [2021-11-12 23:08:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:08:53,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:08:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:08:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:08:55,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:08:55,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431163513] [2021-11-12 23:08:55,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431163513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:08:55,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:08:55,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-12 23:08:55,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036107847] [2021-11-12 23:08:55,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:08:55,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-12 23:08:55,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:08:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-12 23:08:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:08:55,306 INFO L87 Difference]: Start difference. First operand 6080 states and 8717 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:08:59,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:08:59,200 INFO L93 Difference]: Finished difference Result 6618 states and 9477 transitions. [2021-11-12 23:08:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:08:59,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:08:59,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:08:59,210 INFO L225 Difference]: With dead ends: 6618 [2021-11-12 23:08:59,210 INFO L226 Difference]: Without dead ends: 6616 [2021-11-12 23:08:59,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 23:08:59,214 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 570 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1428.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.58ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1654.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:08:59,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1890 Invalid, 1680 Unknown, 0 Unchecked, 16.58ms Time], IncrementalHoareTripleChecker [28 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 1654.23ms Time] [2021-11-12 23:08:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6616 states. [2021-11-12 23:09:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6616 to 6080. [2021-11-12 23:09:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 6079 states have (on average 1.4339529527882875) internal successors, (8717), 6079 states have internal predecessors, (8717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 8717 transitions. [2021-11-12 23:09:00,022 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 8717 transitions. Word has length 59 [2021-11-12 23:09:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:00,022 INFO L470 AbstractCegarLoop]: Abstraction has 6080 states and 8717 transitions. [2021-11-12 23:09:00,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 8717 transitions. [2021-11-12 23:09:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:09:00,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:00,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:00,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-12 23:09:00,025 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:00,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1007838117, now seen corresponding path program 1 times [2021-11-12 23:09:00,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:00,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793965430] [2021-11-12 23:09:00,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:00,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:02,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793965430] [2021-11-12 23:09:02,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793965430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:02,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:02,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 23:09:02,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762750854] [2021-11-12 23:09:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:02,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:09:02,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:09:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:09:02,377 INFO L87 Difference]: Start difference. First operand 6080 states and 8717 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:07,573 INFO L93 Difference]: Finished difference Result 8426 states and 12079 transitions. [2021-11-12 23:09:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:09:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:09:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:07,584 INFO L225 Difference]: With dead ends: 8426 [2021-11-12 23:09:07,584 INFO L226 Difference]: Without dead ends: 7736 [2021-11-12 23:09:07,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=382, Invalid=1598, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:09:07,588 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 786 mSDsluCounter, 1370 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1725.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.81ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1996.11ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:07,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1518 Invalid, 2329 Unknown, 0 Unchecked, 11.81ms Time], IncrementalHoareTripleChecker [30 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 1996.11ms Time] [2021-11-12 23:09:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2021-11-12 23:09:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 6070. [2021-11-12 23:09:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 6069 states have (on average 1.4346679848409951) internal successors, (8707), 6069 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 8707 transitions. [2021-11-12 23:09:08,240 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 8707 transitions. Word has length 59 [2021-11-12 23:09:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:08,240 INFO L470 AbstractCegarLoop]: Abstraction has 6070 states and 8707 transitions. [2021-11-12 23:09:08,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 8707 transitions. [2021-11-12 23:09:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-12 23:09:08,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:08,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:08,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-12 23:09:08,243 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:08,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1683397477, now seen corresponding path program 1 times [2021-11-12 23:09:08,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:08,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566116745] [2021-11-12 23:09:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:08,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:09,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:09,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566116745] [2021-11-12 23:09:09,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566116745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:09,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:09,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-12 23:09:09,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388183992] [2021-11-12 23:09:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:09,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 23:09:09,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 23:09:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:09:09,978 INFO L87 Difference]: Start difference. First operand 6070 states and 8707 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:13,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:13,523 INFO L93 Difference]: Finished difference Result 6949 states and 9952 transitions. [2021-11-12 23:09:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 23:09:13,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-12 23:09:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:13,534 INFO L225 Difference]: With dead ends: 6949 [2021-11-12 23:09:13,535 INFO L226 Difference]: Without dead ends: 6947 [2021-11-12 23:09:13,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=409, Invalid=1571, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:09:13,539 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 821 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1146.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.57ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1323.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:13,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2144 Invalid, 1472 Unknown, 0 Unchecked, 10.57ms Time], IncrementalHoareTripleChecker [30 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1323.63ms Time] [2021-11-12 23:09:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6947 states. [2021-11-12 23:09:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6947 to 6070. [2021-11-12 23:09:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6070 states, 6069 states have (on average 1.4346679848409951) internal successors, (8707), 6069 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 8707 transitions. [2021-11-12 23:09:14,250 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 8707 transitions. Word has length 59 [2021-11-12 23:09:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:14,250 INFO L470 AbstractCegarLoop]: Abstraction has 6070 states and 8707 transitions. [2021-11-12 23:09:14,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 8707 transitions. [2021-11-12 23:09:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 23:09:14,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:14,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:14,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-12 23:09:14,253 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash -394205639, now seen corresponding path program 1 times [2021-11-12 23:09:14,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:14,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164582670] [2021-11-12 23:09:14,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:14,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:21,523 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:21,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164582670] [2021-11-12 23:09:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164582670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:21,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:21,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-11-12 23:09:21,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291720059] [2021-11-12 23:09:21,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-12 23:09:21,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-12 23:09:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2021-11-12 23:09:21,526 INFO L87 Difference]: Start difference. First operand 6070 states and 8707 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:32,881 INFO L93 Difference]: Finished difference Result 6607 states and 9466 transitions. [2021-11-12 23:09:32,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-12 23:09:32,882 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-12 23:09:32,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:32,888 INFO L225 Difference]: With dead ends: 6607 [2021-11-12 23:09:32,888 INFO L226 Difference]: Without dead ends: 6605 [2021-11-12 23:09:32,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=792, Invalid=3114, Unknown=0, NotChecked=0, Total=3906 [2021-11-12 23:09:32,892 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 838 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 4420 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3755.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 4474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.17ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4257.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:32,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 2598 Invalid, 4474 Unknown, 0 Unchecked, 16.17ms Time], IncrementalHoareTripleChecker [54 Valid, 4420 Invalid, 0 Unknown, 0 Unchecked, 4257.05ms Time] [2021-11-12 23:09:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6605 states. [2021-11-12 23:09:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6605 to 6052. [2021-11-12 23:09:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6052 states, 6051 states have (on average 1.4357957362419436) internal successors, (8688), 6051 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6052 states to 6052 states and 8688 transitions. [2021-11-12 23:09:33,472 INFO L78 Accepts]: Start accepts. Automaton has 6052 states and 8688 transitions. Word has length 61 [2021-11-12 23:09:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:33,472 INFO L470 AbstractCegarLoop]: Abstraction has 6052 states and 8688 transitions. [2021-11-12 23:09:33,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6052 states and 8688 transitions. [2021-11-12 23:09:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 23:09:33,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:33,474 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:33,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-12 23:09:33,474 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1204138079, now seen corresponding path program 1 times [2021-11-12 23:09:33,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:33,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354005320] [2021-11-12 23:09:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:33,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:33,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:33,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354005320] [2021-11-12 23:09:33,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354005320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:33,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:33,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:33,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409593614] [2021-11-12 23:09:33,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:33,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:33,521 INFO L87 Difference]: Start difference. First operand 6052 states and 8688 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:34,353 INFO L93 Difference]: Finished difference Result 9443 states and 13691 transitions. [2021-11-12 23:09:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:34,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-12 23:09:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:34,362 INFO L225 Difference]: With dead ends: 9443 [2021-11-12 23:09:34,362 INFO L226 Difference]: Without dead ends: 7377 [2021-11-12 23:09:34,366 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:09:34,366 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 79 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.56ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:34,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 330 Invalid, 26 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 30.56ms Time] [2021-11-12 23:09:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2021-11-12 23:09:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 6961. [2021-11-12 23:09:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 1.4357758620689656) internal successors, (9993), 6960 states have internal predecessors, (9993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 9993 transitions. [2021-11-12 23:09:35,018 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 9993 transitions. Word has length 64 [2021-11-12 23:09:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:35,019 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 9993 transitions. [2021-11-12 23:09:35,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 9993 transitions. [2021-11-12 23:09:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-12 23:09:35,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:35,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:35,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-12 23:09:35,021 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1919564423, now seen corresponding path program 1 times [2021-11-12 23:09:35,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:35,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865841899] [2021-11-12 23:09:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:35,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:35,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:35,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865841899] [2021-11-12 23:09:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865841899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:35,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:35,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:35,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979861347] [2021-11-12 23:09:35,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:35,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:35,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:35,064 INFO L87 Difference]: Start difference. First operand 6961 states and 9993 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:35,930 INFO L93 Difference]: Finished difference Result 11735 states and 17005 transitions. [2021-11-12 23:09:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-12 23:09:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:35,941 INFO L225 Difference]: With dead ends: 11735 [2021-11-12 23:09:35,941 INFO L226 Difference]: Without dead ends: 8781 [2021-11-12 23:09:35,946 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:09:35,946 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 74 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:35,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 312 Invalid, 26 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 30.76ms Time] [2021-11-12 23:09:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8781 states. [2021-11-12 23:09:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8781 to 8213. [2021-11-12 23:09:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 1.434242571846079) internal successors, (11778), 8212 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 11778 transitions. [2021-11-12 23:09:36,717 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 11778 transitions. Word has length 67 [2021-11-12 23:09:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:36,717 INFO L470 AbstractCegarLoop]: Abstraction has 8213 states and 11778 transitions. [2021-11-12 23:09:36,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 11778 transitions. [2021-11-12 23:09:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 23:09:36,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:36,720 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:36,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-12 23:09:36,720 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:36,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1272491427, now seen corresponding path program 1 times [2021-11-12 23:09:36,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:36,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3892551] [2021-11-12 23:09:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:36,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:36,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:36,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3892551] [2021-11-12 23:09:36,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3892551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:36,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:36,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:36,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954758147] [2021-11-12 23:09:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:36,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:36,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:36,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:36,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:36,779 INFO L87 Difference]: Start difference. First operand 8213 states and 11778 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:38,053 INFO L93 Difference]: Finished difference Result 16031 states and 23133 transitions. [2021-11-12 23:09:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-12 23:09:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:38,066 INFO L225 Difference]: With dead ends: 16031 [2021-11-12 23:09:38,066 INFO L226 Difference]: Without dead ends: 11101 [2021-11-12 23:09:38,073 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:09:38,074 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 69 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:38,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 293 Invalid, 27 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 31.78ms Time] [2021-11-12 23:09:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-11-12 23:09:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10179. [2021-11-12 23:09:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10178 states have (on average 1.4286696797013165) internal successors, (14541), 10178 states have internal predecessors, (14541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 14541 transitions. [2021-11-12 23:09:39,030 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 14541 transitions. Word has length 70 [2021-11-12 23:09:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:39,031 INFO L470 AbstractCegarLoop]: Abstraction has 10179 states and 14541 transitions. [2021-11-12 23:09:39,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 14541 transitions. [2021-11-12 23:09:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-12 23:09:39,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:39,033 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:09:39,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-12 23:09:39,034 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1547887493, now seen corresponding path program 1 times [2021-11-12 23:09:39,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:39,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642588871] [2021-11-12 23:09:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:39,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:39,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:39,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642588871] [2021-11-12 23:09:39,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642588871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:39,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:39,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:09:39,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623261976] [2021-11-12 23:09:39,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:39,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:09:39,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:09:39,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:09:39,079 INFO L87 Difference]: Start difference. First operand 10179 states and 14541 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:40,602 INFO L93 Difference]: Finished difference Result 22158 states and 31760 transitions. [2021-11-12 23:09:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:09:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-12 23:09:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:40,620 INFO L225 Difference]: With dead ends: 22158 [2021-11-12 23:09:40,620 INFO L226 Difference]: Without dead ends: 14206 [2021-11-12 23:09:40,630 INFO L932 BasicCegarLoop]: 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 [2021-11-12 23:09:40,630 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 64 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.50ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:40,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 272 Invalid, 28 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 32.50ms Time] [2021-11-12 23:09:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14206 states. [2021-11-12 23:09:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14206 to 13030. [2021-11-12 23:09:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13030 states, 13029 states have (on average 1.4208304551385371) internal successors, (18512), 13029 states have internal predecessors, (18512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13030 states to 13030 states and 18512 transitions. [2021-11-12 23:09:41,880 INFO L78 Accepts]: Start accepts. Automaton has 13030 states and 18512 transitions. Word has length 73 [2021-11-12 23:09:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:41,880 INFO L470 AbstractCegarLoop]: Abstraction has 13030 states and 18512 transitions. [2021-11-12 23:09:41,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 13030 states and 18512 transitions. [2021-11-12 23:09:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:09:41,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:41,885 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-12 23:09:41,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-12 23:09:41,886 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -909715689, now seen corresponding path program 1 times [2021-11-12 23:09:41,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:41,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642466149] [2021-11-12 23:09:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:41,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 23:09:41,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:41,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642466149] [2021-11-12 23:09:41,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642466149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:41,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:09:41,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:09:41,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684742556] [2021-11-12 23:09:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:41,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:09:41,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:09:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:09:41,977 INFO L87 Difference]: Start difference. First operand 13030 states and 18512 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:09:45,666 INFO L93 Difference]: Finished difference Result 44335 states and 62798 transitions. [2021-11-12 23:09:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:09:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-12 23:09:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:09:45,720 INFO L225 Difference]: With dead ends: 44335 [2021-11-12 23:09:45,720 INFO L226 Difference]: Without dead ends: 32647 [2021-11-12 23:09:45,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:09:45,735 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 992 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 229.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.15ms IncrementalHoareTripleChecker+Time [2021-11-12 23:09:45,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 336 Invalid, 343 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [35 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 284.15ms Time] [2021-11-12 23:09:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32647 states. [2021-11-12 23:09:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32647 to 24397. [2021-11-12 23:09:48,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24397 states, 24396 states have (on average 1.3851860960813247) internal successors, (33793), 24396 states have internal predecessors, (33793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24397 states to 24397 states and 33793 transitions. [2021-11-12 23:09:48,736 INFO L78 Accepts]: Start accepts. Automaton has 24397 states and 33793 transitions. Word has length 87 [2021-11-12 23:09:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:09:48,737 INFO L470 AbstractCegarLoop]: Abstraction has 24397 states and 33793 transitions. [2021-11-12 23:09:48,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:09:48,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24397 states and 33793 transitions. [2021-11-12 23:09:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 23:09:48,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:09:48,747 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-12 23:09:48,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-12 23:09:48,747 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:09:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:09:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1875167620, now seen corresponding path program 1 times [2021-11-12 23:09:48,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:09:48,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560718000] [2021-11-12 23:09:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:48,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:09:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:09:49,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:09:49,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560718000] [2021-11-12 23:09:49,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560718000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:09:49,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866826694] [2021-11-12 23:09:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:09:49,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:09:49,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:09:49,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:09:49,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68086a41-f1f9-4fbe-9aab-126445d35cee/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:09:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:09:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-12 23:09:49,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:09:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:09:53,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:09:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 23:09:56,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866826694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:09:56,100 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:09:56,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 12] imperfect sequences [23] total 48 [2021-11-12 23:09:56,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268938824] [2021-11-12 23:09:56,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:09:56,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-12 23:09:56,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:09:56,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-12 23:09:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1998, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 23:09:56,104 INFO L87 Difference]: Start difference. First operand 24397 states and 33793 transitions. Second operand has 27 states, 27 states have (on average 5.703703703703703) internal successors, (154), 26 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:10:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:10:40,914 INFO L93 Difference]: Finished difference Result 201250 states and 280885 transitions. [2021-11-12 23:10:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-12 23:10:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.703703703703703) internal successors, (154), 26 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-12 23:10:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:10:41,496 INFO L225 Difference]: With dead ends: 201250 [2021-11-12 23:10:41,497 INFO L226 Difference]: Without dead ends: 180759 [2021-11-12 23:10:41,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2906, Invalid=11374, Unknown=0, NotChecked=0, Total=14280 [2021-11-12 23:10:41,598 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 4823 mSDsluCounter, 4290 mSDsCounter, 0 mSdLazyCounter, 5687 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5617.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4823 SdHoareTripleChecker+Valid, 4511 SdHoareTripleChecker+Invalid, 5897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.49ms SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 5687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6597.44ms IncrementalHoareTripleChecker+Time [2021-11-12 23:10:41,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4823 Valid, 4511 Invalid, 5897 Unknown, 0 Unchecked, 36.49ms Time], IncrementalHoareTripleChecker [210 Valid, 5687 Invalid, 0 Unknown, 0 Unchecked, 6597.44ms Time] [2021-11-12 23:10:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180759 states.