./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6382bf7d3923cc5e5d05cc0b7a660c702c8db87925ef073e0a0a8704a68a4a3b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:04:03,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:04:03,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:04:03,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:04:03,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:04:03,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:04:03,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:04:03,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:04:03,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:04:03,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:04:03,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:04:03,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:04:03,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:04:03,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:04:03,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:04:03,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:04:03,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:04:03,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:04:03,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:04:03,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:04:03,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:04:03,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:04:03,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:04:03,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:04:03,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:04:03,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:04:03,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:04:03,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:04:03,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:04:03,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:04:03,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:04:03,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:04:03,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:04:03,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:04:03,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:04:03,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:04:03,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:04:03,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:04:03,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:04:03,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:04:03,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:04:03,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:04:03,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:04:03,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:04:03,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:04:03,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:04:03,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:04:03,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:04:03,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:04:03,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:04:03,182 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:04:03,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:04:03,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:04:03,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:04:03,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:04:03,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:04:03,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:04:03,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:04:03,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:04:03,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:04:03,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:03,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:04:03,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:04:03,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:04:03,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:04:03,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:04:03,186 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:04:03,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:04:03,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:04:03,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6382bf7d3923cc5e5d05cc0b7a660c702c8db87925ef073e0a0a8704a68a4a3b [2022-11-02 21:04:03,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:04:03,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:04:03,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:04:03,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:04:03,542 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:04:03,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.UNBOUNDED.pals.c [2022-11-02 21:04:03,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/data/a6aa899a0/98592ad2fcbb4480a27cff71291ee5d1/FLAG220c5dd6a [2022-11-02 21:04:04,182 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:04:04,182 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.UNBOUNDED.pals.c [2022-11-02 21:04:04,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/data/a6aa899a0/98592ad2fcbb4480a27cff71291ee5d1/FLAG220c5dd6a [2022-11-02 21:04:04,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/data/a6aa899a0/98592ad2fcbb4480a27cff71291ee5d1 [2022-11-02 21:04:04,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:04:04,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:04:04,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:04,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:04:04,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:04:04,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:04" (1/1) ... [2022-11-02 21:04:04,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc2b4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:04, skipping insertion in model container [2022-11-02 21:04:04,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:04:04" (1/1) ... [2022-11-02 21:04:04,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:04:04,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:04:04,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.UNBOUNDED.pals.c[11298,11311] [2022-11-02 21:04:04,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:04,896 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:04:04,981 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/sv-benchmarks/c/seq-mthreaded/pals_lcr.5.1.ufo.UNBOUNDED.pals.c[11298,11311] [2022-11-02 21:04:04,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:04:05,010 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:04:05,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05 WrapperNode [2022-11-02 21:04:05,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:04:05,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:05,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:04:05,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:04:05,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,090 INFO L138 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 332 [2022-11-02 21:04:05,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:04:05,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:04:05,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:04:05,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:04:05,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:04:05,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:04:05,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:04:05,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:04:05,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (1/1) ... [2022-11-02 21:04:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:04:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:05,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:04:05,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:04:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:04:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:04:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:04:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:04:05,381 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:04:05,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:04:05,938 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:04:05,947 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:04:05,947 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:04:05,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:05 BoogieIcfgContainer [2022-11-02 21:04:05,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:04:05,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:04:05,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:04:05,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:04:05,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:04:04" (1/3) ... [2022-11-02 21:04:05,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d87ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:05, skipping insertion in model container [2022-11-02 21:04:05,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:04:05" (2/3) ... [2022-11-02 21:04:05,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d87ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:04:05, skipping insertion in model container [2022-11-02 21:04:05,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:04:05" (3/3) ... [2022-11-02 21:04:05,959 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c [2022-11-02 21:04:05,979 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:04:05,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:04:06,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:04:06,039 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@fd93436, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:04:06,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:04:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 94 states have internal predecessors, (160), 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) [2022-11-02 21:04:06,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:04:06,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:06,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:06,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -176333024, now seen corresponding path program 1 times [2022-11-02 21:04:06,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:06,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678530211] [2022-11-02 21:04:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:06,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:06,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678530211] [2022-11-02 21:04:06,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678530211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:06,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:06,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:04:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089474967] [2022-11-02 21:04:06,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:06,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:04:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:04:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:04:06,471 INFO L87 Difference]: Start difference. First operand has 95 states, 93 states have (on average 1.7204301075268817) internal successors, (160), 94 states have internal predecessors, (160), 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 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2022-11-02 21:04:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:06,504 INFO L93 Difference]: Finished difference Result 150 states and 249 transitions. [2022-11-02 21:04:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:04:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2022-11-02 21:04:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:06,515 INFO L225 Difference]: With dead ends: 150 [2022-11-02 21:04:06,518 INFO L226 Difference]: Without dead ends: 91 [2022-11-02 21:04:06,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:04:06,527 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:06,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-02 21:04:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-02 21:04:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.7) internal successors, (153), 90 states have internal predecessors, (153), 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) [2022-11-02 21:04:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 153 transitions. [2022-11-02 21:04:06,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 153 transitions. Word has length 33 [2022-11-02 21:04:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:06,573 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 153 transitions. [2022-11-02 21:04:06,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2022-11-02 21:04:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 153 transitions. [2022-11-02 21:04:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 21:04:06,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:06,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:06,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:04:06,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:06,577 INFO L85 PathProgramCache]: Analyzing trace with hash -685806114, now seen corresponding path program 1 times [2022-11-02 21:04:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:06,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947438944] [2022-11-02 21:04:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:06,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:06,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:06,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947438944] [2022-11-02 21:04:06,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947438944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:06,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:06,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:04:06,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530887234] [2022-11-02 21:04:06,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:04:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:04:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:04:06,855 INFO L87 Difference]: Start difference. First operand 91 states and 153 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-11-02 21:04:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:06,992 INFO L93 Difference]: Finished difference Result 149 states and 242 transitions. [2022-11-02 21:04:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:04:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2022-11-02 21:04:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:06,997 INFO L225 Difference]: With dead ends: 149 [2022-11-02 21:04:07,000 INFO L226 Difference]: Without dead ends: 91 [2022-11-02 21:04:07,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:07,002 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 3 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:07,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 570 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-02 21:04:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-02 21:04:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3555555555555556) internal successors, (122), 90 states have internal predecessors, (122), 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) [2022-11-02 21:04:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2022-11-02 21:04:07,021 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 33 [2022-11-02 21:04:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:07,022 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2022-11-02 21:04:07,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-11-02 21:04:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2022-11-02 21:04:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 21:04:07,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:07,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:07,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:04:07,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash 803903125, now seen corresponding path program 1 times [2022-11-02 21:04:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:07,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724281263] [2022-11-02 21:04:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:07,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:07,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724281263] [2022-11-02 21:04:07,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724281263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:07,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:07,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:07,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971775346] [2022-11-02 21:04:07,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:07,249 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-02 21:04:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:07,290 INFO L93 Difference]: Finished difference Result 193 states and 282 transitions. [2022-11-02 21:04:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-11-02 21:04:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:07,296 INFO L225 Difference]: With dead ends: 193 [2022-11-02 21:04:07,296 INFO L226 Difference]: Without dead ends: 139 [2022-11-02 21:04:07,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:07,298 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 71 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:07,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 264 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-02 21:04:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2022-11-02 21:04:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4338235294117647) internal successors, (195), 136 states have internal predecessors, (195), 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) [2022-11-02 21:04:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 195 transitions. [2022-11-02 21:04:07,325 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 195 transitions. Word has length 63 [2022-11-02 21:04:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:07,325 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 195 transitions. [2022-11-02 21:04:07,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-02 21:04:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 195 transitions. [2022-11-02 21:04:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 21:04:07,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:07,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:07,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:04:07,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1136127733, now seen corresponding path program 1 times [2022-11-02 21:04:07,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:07,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665062007] [2022-11-02 21:04:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:07,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:07,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:07,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665062007] [2022-11-02 21:04:07,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665062007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:07,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:07,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191356507] [2022-11-02 21:04:07,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:07,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:07,503 INFO L87 Difference]: Start difference. First operand 137 states and 195 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-02 21:04:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:07,556 INFO L93 Difference]: Finished difference Result 325 states and 491 transitions. [2022-11-02 21:04:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2022-11-02 21:04:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:07,565 INFO L225 Difference]: With dead ends: 325 [2022-11-02 21:04:07,565 INFO L226 Difference]: Without dead ends: 225 [2022-11-02 21:04:07,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:07,567 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 67 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:07,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 263 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-02 21:04:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2022-11-02 21:04:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4864864864864864) internal successors, (330), 222 states have internal predecessors, (330), 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) [2022-11-02 21:04:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 330 transitions. [2022-11-02 21:04:07,612 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 330 transitions. Word has length 63 [2022-11-02 21:04:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:07,612 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 330 transitions. [2022-11-02 21:04:07,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-02 21:04:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 330 transitions. [2022-11-02 21:04:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 21:04:07,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:07,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:07,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:04:07,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1564554881, now seen corresponding path program 1 times [2022-11-02 21:04:07,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74805154] [2022-11-02 21:04:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:07,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74805154] [2022-11-02 21:04:07,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74805154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:07,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:07,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661143786] [2022-11-02 21:04:07,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:07,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:07,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:07,872 INFO L87 Difference]: Start difference. First operand 223 states and 330 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2022-11-02 21:04:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:08,242 INFO L93 Difference]: Finished difference Result 2083 states and 3260 transitions. [2022-11-02 21:04:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:04:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 63 [2022-11-02 21:04:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:08,250 INFO L225 Difference]: With dead ends: 2083 [2022-11-02 21:04:08,250 INFO L226 Difference]: Without dead ends: 1897 [2022-11-02 21:04:08,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:04:08,254 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1361 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:08,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 1223 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-11-02 21:04:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 407. [2022-11-02 21:04:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5123152709359606) internal successors, (614), 406 states have internal predecessors, (614), 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) [2022-11-02 21:04:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 614 transitions. [2022-11-02 21:04:08,319 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 614 transitions. Word has length 63 [2022-11-02 21:04:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:08,322 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 614 transitions. [2022-11-02 21:04:08,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2022-11-02 21:04:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 614 transitions. [2022-11-02 21:04:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 21:04:08,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:08,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:08,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:04:08,334 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:08,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1117008495, now seen corresponding path program 1 times [2022-11-02 21:04:08,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:08,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472435035] [2022-11-02 21:04:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:08,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:08,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472435035] [2022-11-02 21:04:08,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472435035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:08,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:08,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112468117] [2022-11-02 21:04:08,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:08,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:08,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:08,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:08,424 INFO L87 Difference]: Start difference. First operand 407 states and 614 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-02 21:04:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:08,533 INFO L93 Difference]: Finished difference Result 1103 states and 1692 transitions. [2022-11-02 21:04:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:08,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-11-02 21:04:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:08,537 INFO L225 Difference]: With dead ends: 1103 [2022-11-02 21:04:08,537 INFO L226 Difference]: Without dead ends: 733 [2022-11-02 21:04:08,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:08,539 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 50 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:08,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-02 21:04:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 723. [2022-11-02 21:04:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.5041551246537397) internal successors, (1086), 722 states have internal predecessors, (1086), 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) [2022-11-02 21:04:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1086 transitions. [2022-11-02 21:04:08,611 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1086 transitions. Word has length 65 [2022-11-02 21:04:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:08,611 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 1086 transitions. [2022-11-02 21:04:08,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-02 21:04:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1086 transitions. [2022-11-02 21:04:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 21:04:08,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:08,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:08,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:04:08,613 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1050514983, now seen corresponding path program 1 times [2022-11-02 21:04:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:08,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151826628] [2022-11-02 21:04:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:09,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:09,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151826628] [2022-11-02 21:04:09,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151826628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:09,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:09,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551925642] [2022-11-02 21:04:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:09,066 INFO L87 Difference]: Start difference. First operand 723 states and 1086 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2022-11-02 21:04:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:09,347 INFO L93 Difference]: Finished difference Result 1411 states and 2136 transitions. [2022-11-02 21:04:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 65 [2022-11-02 21:04:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:09,355 INFO L225 Difference]: With dead ends: 1411 [2022-11-02 21:04:09,355 INFO L226 Difference]: Without dead ends: 725 [2022-11-02 21:04:09,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:04:09,361 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 454 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:09,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 462 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-02 21:04:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 723. [2022-11-02 21:04:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.4930747922437673) internal successors, (1078), 722 states have internal predecessors, (1078), 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) [2022-11-02 21:04:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1078 transitions. [2022-11-02 21:04:09,436 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1078 transitions. Word has length 65 [2022-11-02 21:04:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:09,437 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 1078 transitions. [2022-11-02 21:04:09,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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) [2022-11-02 21:04:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1078 transitions. [2022-11-02 21:04:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 21:04:09,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:09,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:09,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:04:09,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 738399093, now seen corresponding path program 1 times [2022-11-02 21:04:09,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:09,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887231148] [2022-11-02 21:04:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:09,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887231148] [2022-11-02 21:04:09,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887231148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:09,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976689223] [2022-11-02 21:04:09,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:09,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:09,509 INFO L87 Difference]: Start difference. First operand 723 states and 1078 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-02 21:04:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:09,650 INFO L93 Difference]: Finished difference Result 1999 states and 3000 transitions. [2022-11-02 21:04:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-11-02 21:04:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:09,655 INFO L225 Difference]: With dead ends: 1999 [2022-11-02 21:04:09,655 INFO L226 Difference]: Without dead ends: 1313 [2022-11-02 21:04:09,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:09,657 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 59 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:09,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 254 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-11-02 21:04:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1311. [2022-11-02 21:04:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.4824427480916031) internal successors, (1942), 1310 states have internal predecessors, (1942), 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) [2022-11-02 21:04:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1942 transitions. [2022-11-02 21:04:09,819 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1942 transitions. Word has length 65 [2022-11-02 21:04:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:09,820 INFO L495 AbstractCegarLoop]: Abstraction has 1311 states and 1942 transitions. [2022-11-02 21:04:09,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-02 21:04:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1942 transitions. [2022-11-02 21:04:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 21:04:09,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:09,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:09,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:04:09,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1985906709, now seen corresponding path program 1 times [2022-11-02 21:04:09,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:09,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57437651] [2022-11-02 21:04:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:09,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:09,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:09,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57437651] [2022-11-02 21:04:09,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57437651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:09,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:09,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:09,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712754571] [2022-11-02 21:04:09,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:09,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:09,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:09,878 INFO L87 Difference]: Start difference. First operand 1311 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-02 21:04:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:10,167 INFO L93 Difference]: Finished difference Result 3667 states and 5432 transitions. [2022-11-02 21:04:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-11-02 21:04:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:10,176 INFO L225 Difference]: With dead ends: 3667 [2022-11-02 21:04:10,176 INFO L226 Difference]: Without dead ends: 2393 [2022-11-02 21:04:10,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:10,178 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 63 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:10,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 263 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2022-11-02 21:04:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2391. [2022-11-02 21:04:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 1.4619246861924686) internal successors, (3494), 2390 states have internal predecessors, (3494), 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) [2022-11-02 21:04:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3494 transitions. [2022-11-02 21:04:10,496 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3494 transitions. Word has length 65 [2022-11-02 21:04:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:10,496 INFO L495 AbstractCegarLoop]: Abstraction has 2391 states and 3494 transitions. [2022-11-02 21:04:10,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2022-11-02 21:04:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3494 transitions. [2022-11-02 21:04:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 21:04:10,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:10,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:04:10,498 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1379050855, now seen corresponding path program 1 times [2022-11-02 21:04:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:10,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055657213] [2022-11-02 21:04:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:10,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:10,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055657213] [2022-11-02 21:04:10,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055657213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:10,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:10,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:04:10,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820171161] [2022-11-02 21:04:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:10,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:04:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:04:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:04:10,748 INFO L87 Difference]: Start difference. First operand 2391 states and 3494 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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) [2022-11-02 21:04:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:11,373 INFO L93 Difference]: Finished difference Result 4149 states and 6028 transitions. [2022-11-02 21:04:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:04:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 66 [2022-11-02 21:04:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:11,386 INFO L225 Difference]: With dead ends: 4149 [2022-11-02 21:04:11,387 INFO L226 Difference]: Without dead ends: 4147 [2022-11-02 21:04:11,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:04:11,391 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 600 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:11,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 619 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-11-02 21:04:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 2487. [2022-11-02 21:04:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.4376508447304908) internal successors, (3574), 2486 states have internal predecessors, (3574), 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) [2022-11-02 21:04:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3574 transitions. [2022-11-02 21:04:11,779 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3574 transitions. Word has length 66 [2022-11-02 21:04:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:11,780 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 3574 transitions. [2022-11-02 21:04:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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) [2022-11-02 21:04:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3574 transitions. [2022-11-02 21:04:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 21:04:11,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:11,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:11,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:04:11,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1091422096, now seen corresponding path program 1 times [2022-11-02 21:04:11,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:11,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749830314] [2022-11-02 21:04:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:11,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:11,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749830314] [2022-11-02 21:04:11,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749830314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:11,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:11,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:11,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814618250] [2022-11-02 21:04:11,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:11,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:11,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:11,870 INFO L87 Difference]: Start difference. First operand 2487 states and 3574 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) [2022-11-02 21:04:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:12,345 INFO L93 Difference]: Finished difference Result 4990 states and 7228 transitions. [2022-11-02 21:04:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:12,350 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 [2022-11-02 21:04:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:12,362 INFO L225 Difference]: With dead ends: 4990 [2022-11-02 21:04:12,362 INFO L226 Difference]: Without dead ends: 3611 [2022-11-02 21:04:12,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:12,365 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 72 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:12,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 269 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2022-11-02 21:04:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 3609. [2022-11-02 21:04:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3608 states have (on average 1.4301552106430155) internal successors, (5160), 3608 states have internal predecessors, (5160), 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) [2022-11-02 21:04:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5160 transitions. [2022-11-02 21:04:12,961 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5160 transitions. Word has length 67 [2022-11-02 21:04:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:12,961 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 5160 transitions. [2022-11-02 21:04:12,961 INFO L496 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) [2022-11-02 21:04:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5160 transitions. [2022-11-02 21:04:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:04:12,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:12,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:12,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 21:04:12,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:12,967 INFO L85 PathProgramCache]: Analyzing trace with hash 291374621, now seen corresponding path program 1 times [2022-11-02 21:04:12,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:12,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218519974] [2022-11-02 21:04:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:12,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:04:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218519974] [2022-11-02 21:04:13,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218519974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:13,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:13,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237182875] [2022-11-02 21:04:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:13,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:13,193 INFO L87 Difference]: Start difference. First operand 3609 states and 5160 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 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) [2022-11-02 21:04:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:15,878 INFO L93 Difference]: Finished difference Result 22181 states and 31758 transitions. [2022-11-02 21:04:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:15,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 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 94 [2022-11-02 21:04:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:15,950 INFO L225 Difference]: With dead ends: 22181 [2022-11-02 21:04:15,950 INFO L226 Difference]: Without dead ends: 18611 [2022-11-02 21:04:15,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:15,958 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 877 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:15,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 707 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18611 states. [2022-11-02 21:04:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18611 to 7177. [2022-11-02 21:04:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 1.4258639910813824) internal successors, (10232), 7176 states have internal predecessors, (10232), 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) [2022-11-02 21:04:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10232 transitions. [2022-11-02 21:04:17,046 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10232 transitions. Word has length 94 [2022-11-02 21:04:17,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:17,047 INFO L495 AbstractCegarLoop]: Abstraction has 7177 states and 10232 transitions. [2022-11-02 21:04:17,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 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) [2022-11-02 21:04:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10232 transitions. [2022-11-02 21:04:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:04:17,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:17,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:17,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 21:04:17,051 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1538882237, now seen corresponding path program 1 times [2022-11-02 21:04:17,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:17,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044871873] [2022-11-02 21:04:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:04:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:17,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044871873] [2022-11-02 21:04:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044871873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:17,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:17,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959038695] [2022-11-02 21:04:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:17,234 INFO L87 Difference]: Start difference. First operand 7177 states and 10232 transitions. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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) [2022-11-02 21:04:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:20,089 INFO L93 Difference]: Finished difference Result 25749 states and 36830 transitions. [2022-11-02 21:04:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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 94 [2022-11-02 21:04:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:20,140 INFO L225 Difference]: With dead ends: 25749 [2022-11-02 21:04:20,140 INFO L226 Difference]: Without dead ends: 22179 [2022-11-02 21:04:20,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:20,149 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 765 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:20,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 766 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22179 states. [2022-11-02 21:04:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22179 to 12537. [2022-11-02 21:04:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 12536 states have (on average 1.419910657306956) internal successors, (17800), 12536 states have internal predecessors, (17800), 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) [2022-11-02 21:04:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 17800 transitions. [2022-11-02 21:04:21,832 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 17800 transitions. Word has length 94 [2022-11-02 21:04:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:21,833 INFO L495 AbstractCegarLoop]: Abstraction has 12537 states and 17800 transitions. [2022-11-02 21:04:21,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 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) [2022-11-02 21:04:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 17800 transitions. [2022-11-02 21:04:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:04:21,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:21,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:21,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 21:04:21,837 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1286652077, now seen corresponding path program 1 times [2022-11-02 21:04:21,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:21,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349245970] [2022-11-02 21:04:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:21,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:04:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349245970] [2022-11-02 21:04:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349245970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:22,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:22,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130035873] [2022-11-02 21:04:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:22,012 INFO L87 Difference]: Start difference. First operand 12537 states and 17800 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2022-11-02 21:04:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:25,385 INFO L93 Difference]: Finished difference Result 29317 states and 41902 transitions. [2022-11-02 21:04:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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 94 [2022-11-02 21:04:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:25,433 INFO L225 Difference]: With dead ends: 29317 [2022-11-02 21:04:25,433 INFO L226 Difference]: Without dead ends: 25747 [2022-11-02 21:04:25,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:25,445 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 778 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:25,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 798 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25747 states. [2022-11-02 21:04:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25747 to 16105. [2022-11-02 21:04:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16105 states, 16104 states have (on average 1.42026825633383) internal successors, (22872), 16104 states have internal predecessors, (22872), 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) [2022-11-02 21:04:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16105 states to 16105 states and 22872 transitions. [2022-11-02 21:04:27,427 INFO L78 Accepts]: Start accepts. Automaton has 16105 states and 22872 transitions. Word has length 94 [2022-11-02 21:04:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:27,427 INFO L495 AbstractCegarLoop]: Abstraction has 16105 states and 22872 transitions. [2022-11-02 21:04:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2022-11-02 21:04:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 16105 states and 22872 transitions. [2022-11-02 21:04:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-02 21:04:27,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:27,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:27,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 21:04:27,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1772856179, now seen corresponding path program 1 times [2022-11-02 21:04:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706304791] [2022-11-02 21:04:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:27,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:04:27,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:27,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706304791] [2022-11-02 21:04:27,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706304791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:27,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:27,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:27,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274599968] [2022-11-02 21:04:27,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:27,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:27,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:27,597 INFO L87 Difference]: Start difference. First operand 16105 states and 22872 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2022-11-02 21:04:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:30,539 INFO L93 Difference]: Finished difference Result 32885 states and 46974 transitions. [2022-11-02 21:04:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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 94 [2022-11-02 21:04:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:30,602 INFO L225 Difference]: With dead ends: 32885 [2022-11-02 21:04:30,602 INFO L226 Difference]: Without dead ends: 29315 [2022-11-02 21:04:30,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:30,613 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 856 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:30,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 781 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29315 states. [2022-11-02 21:04:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29315 to 19673. [2022-11-02 21:04:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19673 states, 19672 states have (on average 1.420496136640911) internal successors, (27944), 19672 states have internal predecessors, (27944), 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) [2022-11-02 21:04:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19673 states to 19673 states and 27944 transitions. [2022-11-02 21:04:34,020 INFO L78 Accepts]: Start accepts. Automaton has 19673 states and 27944 transitions. Word has length 94 [2022-11-02 21:04:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:34,020 INFO L495 AbstractCegarLoop]: Abstraction has 19673 states and 27944 transitions. [2022-11-02 21:04:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 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) [2022-11-02 21:04:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 19673 states and 27944 transitions. [2022-11-02 21:04:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 21:04:34,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:34,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 21:04:34,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1846336056, now seen corresponding path program 1 times [2022-11-02 21:04:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:34,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662725955] [2022-11-02 21:04:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:34,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:34,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662725955] [2022-11-02 21:04:34,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662725955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:34,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:34,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:04:34,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997349650] [2022-11-02 21:04:34,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:34,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:04:34,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:04:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:04:34,194 INFO L87 Difference]: Start difference. First operand 19673 states and 27944 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2022-11-02 21:04:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:38,098 INFO L93 Difference]: Finished difference Result 34309 states and 49038 transitions. [2022-11-02 21:04:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:04:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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 96 [2022-11-02 21:04:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:38,164 INFO L225 Difference]: With dead ends: 34309 [2022-11-02 21:04:38,164 INFO L226 Difference]: Without dead ends: 31811 [2022-11-02 21:04:38,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:04:38,180 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 846 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:38,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 724 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:04:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31811 states. [2022-11-02 21:04:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31811 to 22169. [2022-11-02 21:04:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 1.4222302417899675) internal successors, (31528), 22168 states have internal predecessors, (31528), 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) [2022-11-02 21:04:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 31528 transitions. [2022-11-02 21:04:40,712 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 31528 transitions. Word has length 96 [2022-11-02 21:04:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:40,714 INFO L495 AbstractCegarLoop]: Abstraction has 22169 states and 31528 transitions. [2022-11-02 21:04:40,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 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) [2022-11-02 21:04:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 31528 transitions. [2022-11-02 21:04:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 21:04:40,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:40,722 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:40,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 21:04:40,722 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -511065483, now seen corresponding path program 1 times [2022-11-02 21:04:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645020954] [2022-11-02 21:04:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:40,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:40,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645020954] [2022-11-02 21:04:40,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645020954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:40,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:40,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710218477] [2022-11-02 21:04:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:40,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:40,835 INFO L87 Difference]: Start difference. First operand 22169 states and 31528 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-11-02 21:04:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:42,927 INFO L93 Difference]: Finished difference Result 38427 states and 54862 transitions. [2022-11-02 21:04:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-02 21:04:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:42,953 INFO L225 Difference]: With dead ends: 38427 [2022-11-02 21:04:42,953 INFO L226 Difference]: Without dead ends: 16297 [2022-11-02 21:04:42,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:42,975 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 54 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:42,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 268 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2022-11-02 21:04:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 16295. [2022-11-02 21:04:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16295 states, 16294 states have (on average 1.4215662206947342) internal successors, (23163), 16294 states have internal predecessors, (23163), 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) [2022-11-02 21:04:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16295 states to 16295 states and 23163 transitions. [2022-11-02 21:04:44,898 INFO L78 Accepts]: Start accepts. Automaton has 16295 states and 23163 transitions. Word has length 96 [2022-11-02 21:04:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:44,899 INFO L495 AbstractCegarLoop]: Abstraction has 16295 states and 23163 transitions. [2022-11-02 21:04:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-11-02 21:04:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 16295 states and 23163 transitions. [2022-11-02 21:04:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:04:44,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:44,904 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 21:04:44,904 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2106475655, now seen corresponding path program 1 times [2022-11-02 21:04:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221072802] [2022-11-02 21:04:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:45,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:45,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221072802] [2022-11-02 21:04:45,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221072802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:45,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:45,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:45,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209571322] [2022-11-02 21:04:45,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:45,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:45,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:45,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:45,006 INFO L87 Difference]: Start difference. First operand 16295 states and 23163 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-11-02 21:04:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:45,881 INFO L93 Difference]: Finished difference Result 24411 states and 34709 transitions. [2022-11-02 21:04:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2022-11-02 21:04:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:45,890 INFO L225 Difference]: With dead ends: 24411 [2022-11-02 21:04:45,890 INFO L226 Difference]: Without dead ends: 8185 [2022-11-02 21:04:45,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:45,905 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 48 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:45,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 247 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8185 states. [2022-11-02 21:04:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8185 to 8183. [2022-11-02 21:04:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8183 states, 8182 states have (on average 1.4073576142752384) internal successors, (11515), 8182 states have internal predecessors, (11515), 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) [2022-11-02 21:04:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8183 states to 8183 states and 11515 transitions. [2022-11-02 21:04:46,812 INFO L78 Accepts]: Start accepts. Automaton has 8183 states and 11515 transitions. Word has length 97 [2022-11-02 21:04:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:46,812 INFO L495 AbstractCegarLoop]: Abstraction has 8183 states and 11515 transitions. [2022-11-02 21:04:46,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-11-02 21:04:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8183 states and 11515 transitions. [2022-11-02 21:04:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:04:46,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:46,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:46,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 21:04:46,816 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2101372847, now seen corresponding path program 1 times [2022-11-02 21:04:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:46,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060164776] [2022-11-02 21:04:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060164776] [2022-11-02 21:04:46,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060164776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:04:46,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:04:46,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:04:46,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316219696] [2022-11-02 21:04:46,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:04:46,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:04:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:04:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:46,917 INFO L87 Difference]: Start difference. First operand 8183 states and 11515 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-11-02 21:04:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:04:47,586 INFO L93 Difference]: Finished difference Result 12243 states and 17237 transitions. [2022-11-02 21:04:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:04:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2022-11-02 21:04:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:04:47,591 INFO L225 Difference]: With dead ends: 12243 [2022-11-02 21:04:47,592 INFO L226 Difference]: Without dead ends: 4129 [2022-11-02 21:04:47,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:04:47,598 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 44 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:04:47,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 232 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:04:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-11-02 21:04:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4127. [2022-11-02 21:04:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 4126 states have (on average 1.3919049927290355) internal successors, (5743), 4126 states have internal predecessors, (5743), 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) [2022-11-02 21:04:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 5743 transitions. [2022-11-02 21:04:48,246 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 5743 transitions. Word has length 97 [2022-11-02 21:04:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:04:48,247 INFO L495 AbstractCegarLoop]: Abstraction has 4127 states and 5743 transitions. [2022-11-02 21:04:48,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2022-11-02 21:04:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 5743 transitions. [2022-11-02 21:04:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-02 21:04:48,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:04:48,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:04:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 21:04:48,251 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:04:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:04:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash 982097637, now seen corresponding path program 1 times [2022-11-02 21:04:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:04:48,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290889406] [2022-11-02 21:04:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:04:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:04:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:04:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290889406] [2022-11-02 21:04:48,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290889406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:04:48,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079552057] [2022-11-02 21:04:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:04:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:04:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:04:48,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:04:48,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:04:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:04:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:04:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:04:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:49,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:04:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:04:49,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079552057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:04:49,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:04:49,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-11-02 21:04:49,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229284489] [2022-11-02 21:04:49,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:04:49,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:04:49,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:04:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:04:49,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:04:49,736 INFO L87 Difference]: Start difference. First operand 4127 states and 5743 transitions. Second operand has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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) [2022-11-02 21:05:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:00,486 INFO L93 Difference]: Finished difference Result 55772 states and 76840 transitions. [2022-11-02 21:05:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-02 21:05:00,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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 97 [2022-11-02 21:05:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:00,534 INFO L225 Difference]: With dead ends: 55772 [2022-11-02 21:05:00,534 INFO L226 Difference]: Without dead ends: 51714 [2022-11-02 21:05:00,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2022-11-02 21:05:00,545 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 4717 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:00,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4717 Valid, 1192 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51714 states. [2022-11-02 21:05:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51714 to 34238. [2022-11-02 21:05:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34238 states, 34237 states have (on average 1.334404299442124) internal successors, (45686), 34237 states have internal predecessors, (45686), 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) [2022-11-02 21:05:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34238 states to 34238 states and 45686 transitions. [2022-11-02 21:05:05,211 INFO L78 Accepts]: Start accepts. Automaton has 34238 states and 45686 transitions. Word has length 97 [2022-11-02 21:05:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:05,211 INFO L495 AbstractCegarLoop]: Abstraction has 34238 states and 45686 transitions. [2022-11-02 21:05:05,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.277777777777779) internal successors, (275), 18 states have internal predecessors, (275), 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) [2022-11-02 21:05:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 34238 states and 45686 transitions. [2022-11-02 21:05:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-02 21:05:05,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:05,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:05,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:05,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:05,418 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:05,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1539937692, now seen corresponding path program 1 times [2022-11-02 21:05:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:05,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357390165] [2022-11-02 21:05:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:05,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357390165] [2022-11-02 21:05:05,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357390165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:05,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548705744] [2022-11-02 21:05:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:05,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:05,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:05,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:05,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efb1a603-0c81-447b-8d3a-36e6e8323e05/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:05:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:05,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:05:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:06,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:07,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548705744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:07,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:07,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-02 21:05:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709714776] [2022-11-02 21:05:07,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:05:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:05:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:05:07,611 INFO L87 Difference]: Start difference. First operand 34238 states and 45686 transitions. Second operand has 25 states, 25 states have (on average 10.2) internal successors, (255), 24 states have internal predecessors, (255), 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)