./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:17:26,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:17:26,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:17:27,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:17:27,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:17:27,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:17:27,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:17:27,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:17:27,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:17:27,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:17:27,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:17:27,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:17:27,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:17:27,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:17:27,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:17:27,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:17:27,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:17:27,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:17:27,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:17:27,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:17:27,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:17:27,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:17:27,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:17:27,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:17:27,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:17:27,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:17:27,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:17:27,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:17:27,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:17:27,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:17:27,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:17:27,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:17:27,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:17:27,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:17:27,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:17:27,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:17:27,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:17:27,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:17:27,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:17:27,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:17:27,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:17:27,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:17:27,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:17:27,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:17:27,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:17:27,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:17:27,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:17:27,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:17:27,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:17:27,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:17:27,157 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:17:27,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:17:27,159 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:17:27,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:17:27,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:17:27,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:17:27,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:17:27,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:17:27,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:17:27,161 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:17:27,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:17:27,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:17:27,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:17:27,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:17:27,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:17:27,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:17:27,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:17:27,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:17:27,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:17:27,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:17:27,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:17:27,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:17:27,165 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:17:27,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:17:27,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:17:27,166 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_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc [2022-11-21 16:17:27,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:17:27,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:17:27,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:17:27,610 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:17:27,611 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:17:27,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2022-11-21 16:17:31,054 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:17:31,345 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:17:31,345 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2022-11-21 16:17:31,355 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/data/57ae82013/bc1d70f2d6e942398ad774b3291901ce/FLAG771f37d60 [2022-11-21 16:17:31,372 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/data/57ae82013/bc1d70f2d6e942398ad774b3291901ce [2022-11-21 16:17:31,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:17:31,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:17:31,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:17:31,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:17:31,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:17:31,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64068445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31, skipping insertion in model container [2022-11-21 16:17:31,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:17:31,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:17:31,710 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2022-11-21 16:17:31,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:17:31,728 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:17:31,813 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2022-11-21 16:17:31,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:17:31,832 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:17:31,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31 WrapperNode [2022-11-21 16:17:31,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:17:31,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:17:31,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:17:31,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:17:31,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,897 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 285 [2022-11-21 16:17:31,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:17:31,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:17:31,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:17:31,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:17:31,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:17:31,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:17:31,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:17:31,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:17:31,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (1/1) ... [2022-11-21 16:17:31,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:17:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:32,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:17:32,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:17:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:17:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:17:32,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:17:32,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:17:32,279 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:17:32,281 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:17:32,894 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:17:32,904 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:17:32,904 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:17:32,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:17:32 BoogieIcfgContainer [2022-11-21 16:17:32,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:17:32,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:17:32,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:17:32,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:17:32,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:17:31" (1/3) ... [2022-11-21 16:17:32,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43347e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:17:32, skipping insertion in model container [2022-11-21 16:17:32,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:17:31" (2/3) ... [2022-11-21 16:17:32,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43347e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:17:32, skipping insertion in model container [2022-11-21 16:17:32,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:17:32" (3/3) ... [2022-11-21 16:17:32,947 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2022-11-21 16:17:32,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:17:32,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:17:33,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:17:33,083 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;@781e039c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:17:33,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:17:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 84 states have internal predecessors, (143), 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) [2022-11-21 16:17:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:17:33,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:33,124 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] [2022-11-21 16:17:33,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:33,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1338703135, now seen corresponding path program 1 times [2022-11-21 16:17:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:33,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34699709] [2022-11-21 16:17:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:33,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:33,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34699709] [2022-11-21 16:17:33,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34699709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:33,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:33,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:17:33,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75233939] [2022-11-21 16:17:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:17:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:33,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:17:33,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:17:33,503 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 84 states have internal predecessors, (143), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-21 16:17:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:33,539 INFO L93 Difference]: Finished difference Result 137 states and 229 transitions. [2022-11-21 16:17:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:17:33,542 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2022-11-21 16:17:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:33,554 INFO L225 Difference]: With dead ends: 137 [2022-11-21 16:17:33,555 INFO L226 Difference]: Without dead ends: 81 [2022-11-21 16:17:33,559 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 [2022-11-21 16:17:33,564 INFO L413 NwaCegarLoop]: 136 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, 136 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 [2022-11-21 16:17:33,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-21 16:17:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-21 16:17:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.7) internal successors, (136), 80 states have internal predecessors, (136), 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) [2022-11-21 16:17:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 136 transitions. [2022-11-21 16:17:33,620 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 136 transitions. Word has length 29 [2022-11-21 16:17:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:33,621 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 136 transitions. [2022-11-21 16:17:33,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-21 16:17:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 136 transitions. [2022-11-21 16:17:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:17:33,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:33,624 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] [2022-11-21 16:17:33,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:17:33,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1472716641, now seen corresponding path program 1 times [2022-11-21 16:17:33,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:33,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286814610] [2022-11-21 16:17:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:33,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:34,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286814610] [2022-11-21 16:17:34,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286814610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:34,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:34,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:17:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212220279] [2022-11-21 16:17:34,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:34,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:17:34,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:17:34,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:17:34,065 INFO L87 Difference]: Start difference. First operand 81 states and 136 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-11-21 16:17:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:34,170 INFO L93 Difference]: Finished difference Result 136 states and 222 transitions. [2022-11-21 16:17:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:17:34,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 29 [2022-11-21 16:17:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:34,173 INFO L225 Difference]: With dead ends: 136 [2022-11-21 16:17:34,173 INFO L226 Difference]: Without dead ends: 81 [2022-11-21 16:17:34,174 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 [2022-11-21 16:17:34,175 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:34,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 509 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:17:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-21 16:17:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-21 16:17:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4) internal successors, (112), 80 states have internal predecessors, (112), 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) [2022-11-21 16:17:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2022-11-21 16:17:34,186 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 29 [2022-11-21 16:17:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:34,186 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2022-11-21 16:17:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-11-21 16:17:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2022-11-21 16:17:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:17:34,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:34,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:34,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:17:34,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash -483680104, now seen corresponding path program 1 times [2022-11-21 16:17:34,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342623390] [2022-11-21 16:17:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:34,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342623390] [2022-11-21 16:17:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342623390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:34,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:34,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:34,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789475807] [2022-11-21 16:17:34,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:34,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:34,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:34,321 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-21 16:17:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:34,356 INFO L93 Difference]: Finished difference Result 175 states and 262 transitions. [2022-11-21 16:17:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2022-11-21 16:17:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:34,359 INFO L225 Difference]: With dead ends: 175 [2022-11-21 16:17:34,359 INFO L226 Difference]: Without dead ends: 124 [2022-11-21 16:17:34,360 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 [2022-11-21 16:17:34,362 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 62 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 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 [2022-11-21 16:17:34,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-21 16:17:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-21 16:17:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.4710743801652892) internal successors, (178), 121 states have internal predecessors, (178), 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) [2022-11-21 16:17:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 178 transitions. [2022-11-21 16:17:34,381 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 178 transitions. Word has length 52 [2022-11-21 16:17:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:34,382 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 178 transitions. [2022-11-21 16:17:34,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-21 16:17:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 178 transitions. [2022-11-21 16:17:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:17:34,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:34,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:34,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:17:34,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1993840089, now seen corresponding path program 1 times [2022-11-21 16:17:34,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:34,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83126965] [2022-11-21 16:17:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83126965] [2022-11-21 16:17:34,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83126965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:34,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:34,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:17:34,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21929121] [2022-11-21 16:17:34,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:34,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:17:34,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:17:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:17:34,589 INFO L87 Difference]: Start difference. First operand 122 states and 178 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-11-21 16:17:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:34,793 INFO L93 Difference]: Finished difference Result 582 states and 918 transitions. [2022-11-21 16:17:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:17:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 52 [2022-11-21 16:17:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:34,802 INFO L225 Difference]: With dead ends: 582 [2022-11-21 16:17:34,802 INFO L226 Difference]: Without dead ends: 490 [2022-11-21 16:17:34,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:17:34,805 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 721 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:34,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 586 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:17:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-21 16:17:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 212. [2022-11-21 16:17:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5213270142180095) internal successors, (321), 211 states have internal predecessors, (321), 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) [2022-11-21 16:17:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2022-11-21 16:17:34,892 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 52 [2022-11-21 16:17:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:34,892 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2022-11-21 16:17:34,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-11-21 16:17:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2022-11-21 16:17:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:17:34,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:34,895 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] [2022-11-21 16:17:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:17:34,896 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1296177241, now seen corresponding path program 1 times [2022-11-21 16:17:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:34,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882219076] [2022-11-21 16:17:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:34,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:35,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:35,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882219076] [2022-11-21 16:17:35,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882219076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:35,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:35,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:17:35,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706372517] [2022-11-21 16:17:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:17:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:17:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:17:35,471 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:35,747 INFO L93 Difference]: Finished difference Result 410 states and 628 transitions. [2022-11-21 16:17:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:17:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-21 16:17:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:35,753 INFO L225 Difference]: With dead ends: 410 [2022-11-21 16:17:35,754 INFO L226 Difference]: Without dead ends: 408 [2022-11-21 16:17:35,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:17:35,767 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 522 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:35,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 570 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:17:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-21 16:17:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 224. [2022-11-21 16:17:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.493273542600897) internal successors, (333), 223 states have internal predecessors, (333), 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) [2022-11-21 16:17:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 333 transitions. [2022-11-21 16:17:35,835 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 333 transitions. Word has length 53 [2022-11-21 16:17:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:35,838 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 333 transitions. [2022-11-21 16:17:35,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 333 transitions. [2022-11-21 16:17:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:17:35,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:35,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:35,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:17:35,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:35,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1579367345, now seen corresponding path program 1 times [2022-11-21 16:17:35,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:35,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620979390] [2022-11-21 16:17:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:36,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620979390] [2022-11-21 16:17:36,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620979390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:36,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:36,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947522612] [2022-11-21 16:17:36,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:36,033 INFO L87 Difference]: Start difference. First operand 224 states and 333 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:36,128 INFO L93 Difference]: Finished difference Result 582 states and 889 transitions. [2022-11-21 16:17:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-21 16:17:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:36,133 INFO L225 Difference]: With dead ends: 582 [2022-11-21 16:17:36,134 INFO L226 Difference]: Without dead ends: 388 [2022-11-21 16:17:36,136 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 [2022-11-21 16:17:36,138 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:36,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 186 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-21 16:17:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 382. [2022-11-21 16:17:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.5039370078740157) internal successors, (573), 381 states have internal predecessors, (573), 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) [2022-11-21 16:17:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 573 transitions. [2022-11-21 16:17:36,206 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 573 transitions. Word has length 54 [2022-11-21 16:17:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:36,206 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 573 transitions. [2022-11-21 16:17:36,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-21 16:17:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 573 transitions. [2022-11-21 16:17:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:17:36,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:36,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:17:36,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 681636818, now seen corresponding path program 1 times [2022-11-21 16:17:36,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:36,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641599236] [2022-11-21 16:17:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:36,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:36,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:36,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641599236] [2022-11-21 16:17:36,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641599236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:36,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:36,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:36,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660269479] [2022-11-21 16:17:36,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:36,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:36,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:36,310 INFO L87 Difference]: Start difference. First operand 382 states and 573 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:36,413 INFO L93 Difference]: Finished difference Result 1022 states and 1547 transitions. [2022-11-21 16:17:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-21 16:17:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:36,418 INFO L225 Difference]: With dead ends: 1022 [2022-11-21 16:17:36,419 INFO L226 Difference]: Without dead ends: 670 [2022-11-21 16:17:36,420 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 [2022-11-21 16:17:36,424 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 58 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 226 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 [2022-11-21 16:17:36,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 226 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-11-21 16:17:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 668. [2022-11-21 16:17:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.4917541229385307) internal successors, (995), 667 states have internal predecessors, (995), 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) [2022-11-21 16:17:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 995 transitions. [2022-11-21 16:17:36,530 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 995 transitions. Word has length 55 [2022-11-21 16:17:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:36,530 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 995 transitions. [2022-11-21 16:17:36,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:36,531 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 995 transitions. [2022-11-21 16:17:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:17:36,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:36,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:36,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:17:36,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1818745234, now seen corresponding path program 1 times [2022-11-21 16:17:36,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:36,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548322064] [2022-11-21 16:17:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:36,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:36,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548322064] [2022-11-21 16:17:36,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548322064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:36,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:36,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227787217] [2022-11-21 16:17:36,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:36,608 INFO L87 Difference]: Start difference. First operand 668 states and 995 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:36,807 INFO L93 Difference]: Finished difference Result 1816 states and 2701 transitions. [2022-11-21 16:17:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-21 16:17:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:36,814 INFO L225 Difference]: With dead ends: 1816 [2022-11-21 16:17:36,815 INFO L226 Difference]: Without dead ends: 1178 [2022-11-21 16:17:36,816 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 [2022-11-21 16:17:36,818 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 66 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 242 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 [2022-11-21 16:17:36,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 242 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-11-21 16:17:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1176. [2022-11-21 16:17:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 1.4629787234042553) internal successors, (1719), 1175 states have internal predecessors, (1719), 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) [2022-11-21 16:17:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1719 transitions. [2022-11-21 16:17:37,022 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1719 transitions. Word has length 55 [2022-11-21 16:17:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:37,024 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1719 transitions. [2022-11-21 16:17:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1719 transitions. [2022-11-21 16:17:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:17:37,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:37,027 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] [2022-11-21 16:17:37,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:17:37,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -258348272, now seen corresponding path program 1 times [2022-11-21 16:17:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603175773] [2022-11-21 16:17:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:37,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:37,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603175773] [2022-11-21 16:17:37,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603175773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:37,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:37,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007371761] [2022-11-21 16:17:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:37,136 INFO L87 Difference]: Start difference. First operand 1176 states and 1719 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-21 16:17:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:37,409 INFO L93 Difference]: Finished difference Result 2319 states and 3421 transitions. [2022-11-21 16:17:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2022-11-21 16:17:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:37,416 INFO L225 Difference]: With dead ends: 2319 [2022-11-21 16:17:37,417 INFO L226 Difference]: Without dead ends: 1676 [2022-11-21 16:17:37,418 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 [2022-11-21 16:17:37,419 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 67 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 253 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 [2022-11-21 16:17:37,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 253 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-11-21 16:17:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1674. [2022-11-21 16:17:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.4542737597130904) internal successors, (2433), 1673 states have internal predecessors, (2433), 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) [2022-11-21 16:17:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2433 transitions. [2022-11-21 16:17:37,687 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2433 transitions. Word has length 56 [2022-11-21 16:17:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:37,687 INFO L495 AbstractCegarLoop]: Abstraction has 1674 states and 2433 transitions. [2022-11-21 16:17:37,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-21 16:17:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2433 transitions. [2022-11-21 16:17:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:17:37,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:37,690 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] [2022-11-21 16:17:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:17:37,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -320122492, now seen corresponding path program 1 times [2022-11-21 16:17:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491152666] [2022-11-21 16:17:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:37,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:17:37,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:37,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491152666] [2022-11-21 16:17:37,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491152666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:37,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:37,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:17:37,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785147167] [2022-11-21 16:17:37,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:37,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:17:37,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:17:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:17:37,949 INFO L87 Difference]: Start difference. First operand 1674 states and 2433 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-11-21 16:17:38,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:38,554 INFO L93 Difference]: Finished difference Result 4724 states and 6970 transitions. [2022-11-21 16:17:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:17:38,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 78 [2022-11-21 16:17:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:38,572 INFO L225 Difference]: With dead ends: 4724 [2022-11-21 16:17:38,572 INFO L226 Difference]: Without dead ends: 3890 [2022-11-21 16:17:38,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:17:38,576 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 518 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:38,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 608 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:17:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-11-21 16:17:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 2482. [2022-11-21 16:17:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 1.456267634018541) internal successors, (3613), 2481 states have internal predecessors, (3613), 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) [2022-11-21 16:17:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3613 transitions. [2022-11-21 16:17:38,951 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3613 transitions. Word has length 78 [2022-11-21 16:17:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:38,952 INFO L495 AbstractCegarLoop]: Abstraction has 2482 states and 3613 transitions. [2022-11-21 16:17:38,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-11-21 16:17:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3613 transitions. [2022-11-21 16:17:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:17:38,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:38,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:38,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:17:38,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:38,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1605488763, now seen corresponding path program 1 times [2022-11-21 16:17:38,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:38,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629493422] [2022-11-21 16:17:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:38,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:17:39,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:39,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629493422] [2022-11-21 16:17:39,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629493422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:39,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:39,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:17:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981424864] [2022-11-21 16:17:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:39,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:17:39,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:17:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:17:39,168 INFO L87 Difference]: Start difference. First operand 2482 states and 3613 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2022-11-21 16:17:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:39,916 INFO L93 Difference]: Finished difference Result 5532 states and 8150 transitions. [2022-11-21 16:17:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:17:39,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 78 [2022-11-21 16:17:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:39,936 INFO L225 Difference]: With dead ends: 5532 [2022-11-21 16:17:39,937 INFO L226 Difference]: Without dead ends: 4698 [2022-11-21 16:17:39,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:17:39,943 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 509 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:39,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 617 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:17:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2022-11-21 16:17:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 3290. [2022-11-21 16:17:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.4572818485861965) internal successors, (4793), 3289 states have internal predecessors, (4793), 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) [2022-11-21 16:17:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4793 transitions. [2022-11-21 16:17:40,356 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4793 transitions. Word has length 78 [2022-11-21 16:17:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:40,357 INFO L495 AbstractCegarLoop]: Abstraction has 3290 states and 4793 transitions. [2022-11-21 16:17:40,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2022-11-21 16:17:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4793 transitions. [2022-11-21 16:17:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:17:40,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:40,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:17:40,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash 140154659, now seen corresponding path program 1 times [2022-11-21 16:17:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:40,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932841869] [2022-11-21 16:17:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:17:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932841869] [2022-11-21 16:17:40,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932841869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:40,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:40,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:17:40,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487685252] [2022-11-21 16:17:40,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:40,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:17:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:40,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:17:40,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:17:40,556 INFO L87 Difference]: Start difference. First operand 3290 states and 4793 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:41,276 INFO L93 Difference]: Finished difference Result 6340 states and 9330 transitions. [2022-11-21 16:17:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:17:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-21 16:17:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:41,297 INFO L225 Difference]: With dead ends: 6340 [2022-11-21 16:17:41,298 INFO L226 Difference]: Without dead ends: 5506 [2022-11-21 16:17:41,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:17:41,301 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 474 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:41,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 681 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:17:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5506 states. [2022-11-21 16:17:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5506 to 4098. [2022-11-21 16:17:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.457896021479131) internal successors, (5973), 4097 states have internal predecessors, (5973), 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) [2022-11-21 16:17:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 5973 transitions. [2022-11-21 16:17:41,904 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 5973 transitions. Word has length 78 [2022-11-21 16:17:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:41,905 INFO L495 AbstractCegarLoop]: Abstraction has 4098 states and 5973 transitions. [2022-11-21 16:17:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:17:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 5973 transitions. [2022-11-21 16:17:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 16:17:41,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:41,908 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] [2022-11-21 16:17:41,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:17:41,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1548609917, now seen corresponding path program 1 times [2022-11-21 16:17:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:41,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784930084] [2022-11-21 16:17:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:41,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:42,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:42,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784930084] [2022-11-21 16:17:42,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784930084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:42,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:42,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679014434] [2022-11-21 16:17:42,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:42,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:42,078 INFO L87 Difference]: Start difference. First operand 4098 states and 5973 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-11-21 16:17:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:42,576 INFO L93 Difference]: Finished difference Result 8166 states and 11915 transitions. [2022-11-21 16:17:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2022-11-21 16:17:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:42,593 INFO L225 Difference]: With dead ends: 8166 [2022-11-21 16:17:42,593 INFO L226 Difference]: Without dead ends: 4100 [2022-11-21 16:17:42,598 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 [2022-11-21 16:17:42,600 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 53 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 240 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 [2022-11-21 16:17:42,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 240 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2022-11-21 16:17:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 4098. [2022-11-21 16:17:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.4432511593849158) internal successors, (5913), 4097 states have internal predecessors, (5913), 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) [2022-11-21 16:17:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 5913 transitions. [2022-11-21 16:17:43,118 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 5913 transitions. Word has length 79 [2022-11-21 16:17:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:43,118 INFO L495 AbstractCegarLoop]: Abstraction has 4098 states and 5913 transitions. [2022-11-21 16:17:43,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-11-21 16:17:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 5913 transitions. [2022-11-21 16:17:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 16:17:43,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:43,121 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:17:43,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:17:43,122 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1346852612, now seen corresponding path program 1 times [2022-11-21 16:17:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:43,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933741250] [2022-11-21 16:17:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:43,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:43,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933741250] [2022-11-21 16:17:43,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933741250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:43,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:43,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:17:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369838454] [2022-11-21 16:17:43,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:43,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:17:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:17:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:17:43,268 INFO L87 Difference]: Start difference. First operand 4098 states and 5913 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-11-21 16:17:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:43,555 INFO L93 Difference]: Finished difference Result 6134 states and 8855 transitions. [2022-11-21 16:17:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:17:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2022-11-21 16:17:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:43,565 INFO L225 Difference]: With dead ends: 6134 [2022-11-21 16:17:43,565 INFO L226 Difference]: Without dead ends: 2068 [2022-11-21 16:17:43,570 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 [2022-11-21 16:17:43,571 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 47 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 218 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 [2022-11-21 16:17:43,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 218 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:17:43,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-21 16:17:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 2066. [2022-11-21 16:17:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 1.425181598062954) internal successors, (2943), 2065 states have internal predecessors, (2943), 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) [2022-11-21 16:17:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 2943 transitions. [2022-11-21 16:17:43,920 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 2943 transitions. Word has length 79 [2022-11-21 16:17:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:43,921 INFO L495 AbstractCegarLoop]: Abstraction has 2066 states and 2943 transitions. [2022-11-21 16:17:43,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-11-21 16:17:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 2943 transitions. [2022-11-21 16:17:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-21 16:17:43,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:43,924 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-21 16:17:43,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:17:43,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:43,926 INFO L85 PathProgramCache]: Analyzing trace with hash -960604293, now seen corresponding path program 1 times [2022-11-21 16:17:43,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:43,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772867055] [2022-11-21 16:17:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:43,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:17:44,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:44,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772867055] [2022-11-21 16:17:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772867055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:17:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789846348] [2022-11-21 16:17:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:44,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:17:44,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:17:44,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:17:45,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:17:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:17:45,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:17:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:17:45,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:17:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:17:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789846348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:17:46,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:17:46,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2022-11-21 16:17:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409319378] [2022-11-21 16:17:46,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:17:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:17:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:17:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:17:46,013 INFO L87 Difference]: Start difference. First operand 2066 states and 2943 transitions. Second operand has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 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) [2022-11-21 16:17:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:17:55,540 INFO L93 Difference]: Finished difference Result 21164 states and 29897 transitions. [2022-11-21 16:17:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 16:17:55,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 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 79 [2022-11-21 16:17:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:17:55,586 INFO L225 Difference]: With dead ends: 21164 [2022-11-21 16:17:55,586 INFO L226 Difference]: Without dead ends: 19742 [2022-11-21 16:17:55,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1266, Invalid=4896, Unknown=0, NotChecked=0, Total=6162 [2022-11-21 16:17:55,595 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 5637 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5637 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:17:55,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5637 Valid, 1824 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:17:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19742 states. [2022-11-21 16:17:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19742 to 12442. [2022-11-21 16:17:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12442 states, 12441 states have (on average 1.3985210192106743) internal successors, (17399), 12441 states have internal predecessors, (17399), 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) [2022-11-21 16:17:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12442 states to 12442 states and 17399 transitions. [2022-11-21 16:17:57,547 INFO L78 Accepts]: Start accepts. Automaton has 12442 states and 17399 transitions. Word has length 79 [2022-11-21 16:17:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:17:57,548 INFO L495 AbstractCegarLoop]: Abstraction has 12442 states and 17399 transitions. [2022-11-21 16:17:57,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 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) [2022-11-21 16:17:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12442 states and 17399 transitions. [2022-11-21 16:17:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-21 16:17:57,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:17:57,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:17:57,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:17:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:17:57,759 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:17:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:17:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash -226962490, now seen corresponding path program 1 times [2022-11-21 16:17:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:17:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947071840] [2022-11-21 16:17:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:17:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:17:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:17:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:17:57,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:17:57,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947071840] [2022-11-21 16:17:57,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947071840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:17:57,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:17:57,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:17:57,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639887025] [2022-11-21 16:17:57,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:17:57,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:17:57,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:17:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:17:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:17:57,934 INFO L87 Difference]: Start difference. First operand 12442 states and 17399 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2022-11-21 16:18:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:00,462 INFO L93 Difference]: Finished difference Result 21666 states and 30490 transitions. [2022-11-21 16:18:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:18:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 80 [2022-11-21 16:18:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:00,507 INFO L225 Difference]: With dead ends: 21666 [2022-11-21 16:18:00,507 INFO L226 Difference]: Without dead ends: 19554 [2022-11-21 16:18:00,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:18:00,513 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 461 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:00,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 762 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:18:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19554 states. [2022-11-21 16:18:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19554 to 14590. [2022-11-21 16:18:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 1.3974227157447392) internal successors, (20387), 14589 states have internal predecessors, (20387), 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) [2022-11-21 16:18:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 20387 transitions. [2022-11-21 16:18:02,617 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 20387 transitions. Word has length 80 [2022-11-21 16:18:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:02,618 INFO L495 AbstractCegarLoop]: Abstraction has 14590 states and 20387 transitions. [2022-11-21 16:18:02,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2022-11-21 16:18:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 20387 transitions. [2022-11-21 16:18:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-21 16:18:02,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:02,621 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] [2022-11-21 16:18:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:18:02,621 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash 113138310, now seen corresponding path program 1 times [2022-11-21 16:18:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:02,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398996156] [2022-11-21 16:18:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:02,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398996156] [2022-11-21 16:18:02,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398996156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:02,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:02,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:18:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089764868] [2022-11-21 16:18:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:18:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:18:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:18:02,729 INFO L87 Difference]: Start difference. First operand 14590 states and 20387 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-21 16:18:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:03,472 INFO L93 Difference]: Finished difference Result 20928 states and 29094 transitions. [2022-11-21 16:18:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:18:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2022-11-21 16:18:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:03,487 INFO L225 Difference]: With dead ends: 20928 [2022-11-21 16:18:03,487 INFO L226 Difference]: Without dead ends: 6370 [2022-11-21 16:18:03,500 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 [2022-11-21 16:18:03,500 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 210 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 [2022-11-21 16:18:03,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 210 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:18:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2022-11-21 16:18:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 6368. [2022-11-21 16:18:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 1.3497722632322915) internal successors, (8594), 6367 states have internal predecessors, (8594), 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) [2022-11-21 16:18:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 8594 transitions. [2022-11-21 16:18:04,289 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 8594 transitions. Word has length 81 [2022-11-21 16:18:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:04,290 INFO L495 AbstractCegarLoop]: Abstraction has 6368 states and 8594 transitions. [2022-11-21 16:18:04,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-21 16:18:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 8594 transitions. [2022-11-21 16:18:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-21 16:18:04,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:04,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:04,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:18:04,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash -750605600, now seen corresponding path program 1 times [2022-11-21 16:18:04,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:04,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355228931] [2022-11-21 16:18:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:04,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:05,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:05,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355228931] [2022-11-21 16:18:05,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355228931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048869149] [2022-11-21 16:18:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:05,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:05,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:05,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:05,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:18:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:18:05,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:08,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048869149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:08,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:08,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-21 16:18:08,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152800657] [2022-11-21 16:18:08,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:18:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:18:08,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:18:08,375 INFO L87 Difference]: Start difference. First operand 6368 states and 8594 transitions. Second operand has 28 states, 28 states have (on average 7.928571428571429) internal successors, (222), 28 states have internal predecessors, (222), 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) [2022-11-21 16:18:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:23,266 INFO L93 Difference]: Finished difference Result 59027 states and 79069 transitions. [2022-11-21 16:18:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-21 16:18:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.928571428571429) internal successors, (222), 28 states have internal predecessors, (222), 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 83 [2022-11-21 16:18:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:23,390 INFO L225 Difference]: With dead ends: 59027 [2022-11-21 16:18:23,391 INFO L226 Difference]: Without dead ends: 52697 [2022-11-21 16:18:23,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1341, Invalid=4979, Unknown=0, NotChecked=0, Total=6320 [2022-11-21 16:18:23,409 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 2589 mSDsluCounter, 3203 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2589 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:23,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2589 Valid, 3380 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-21 16:18:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52697 states. [2022-11-21 16:18:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52697 to 26461. [2022-11-21 16:18:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26461 states, 26460 states have (on average 1.3438019652305366) internal successors, (35557), 26460 states have internal predecessors, (35557), 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) [2022-11-21 16:18:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26461 states to 26461 states and 35557 transitions. [2022-11-21 16:18:27,483 INFO L78 Accepts]: Start accepts. Automaton has 26461 states and 35557 transitions. Word has length 83 [2022-11-21 16:18:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:27,483 INFO L495 AbstractCegarLoop]: Abstraction has 26461 states and 35557 transitions. [2022-11-21 16:18:27,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.928571428571429) internal successors, (222), 28 states have internal predecessors, (222), 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) [2022-11-21 16:18:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26461 states and 35557 transitions. [2022-11-21 16:18:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-21 16:18:27,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:27,486 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] [2022-11-21 16:18:27,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:18:27,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 16:18:27,694 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1726914593, now seen corresponding path program 1 times [2022-11-21 16:18:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325624044] [2022-11-21 16:18:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:27,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:27,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325624044] [2022-11-21 16:18:27,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325624044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:18:27,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:18:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:18:27,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868273852] [2022-11-21 16:18:27,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:18:27,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:18:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:18:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:18:27,872 INFO L87 Difference]: Start difference. First operand 26461 states and 35557 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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) [2022-11-21 16:18:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:29,798 INFO L93 Difference]: Finished difference Result 40285 states and 54092 transitions. [2022-11-21 16:18:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:18:29,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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 83 [2022-11-21 16:18:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:29,824 INFO L225 Difference]: With dead ends: 40285 [2022-11-21 16:18:29,824 INFO L226 Difference]: Without dead ends: 14986 [2022-11-21 16:18:29,850 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 [2022-11-21 16:18:29,851 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 27 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 188 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 [2022-11-21 16:18:29,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 188 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:18:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14986 states. [2022-11-21 16:18:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14986 to 14984. [2022-11-21 16:18:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14984 states, 14983 states have (on average 1.3217646666221718) internal successors, (19804), 14983 states have internal predecessors, (19804), 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) [2022-11-21 16:18:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14984 states to 14984 states and 19804 transitions. [2022-11-21 16:18:32,706 INFO L78 Accepts]: Start accepts. Automaton has 14984 states and 19804 transitions. Word has length 83 [2022-11-21 16:18:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:32,706 INFO L495 AbstractCegarLoop]: Abstraction has 14984 states and 19804 transitions. [2022-11-21 16:18:32,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 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) [2022-11-21 16:18:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 14984 states and 19804 transitions. [2022-11-21 16:18:32,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-21 16:18:32,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:32,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:18:32,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:18:32,709 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:18:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash -775907934, now seen corresponding path program 1 times [2022-11-21 16:18:32,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:32,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784435741] [2022-11-21 16:18:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:32,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:33,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:33,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784435741] [2022-11-21 16:18:33,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784435741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:33,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6262466] [2022-11-21 16:18:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:33,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:33,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:33,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:33,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f943fd-c696-4697-aa20-9c5953b60cd3/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:18:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:34,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:18:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:35,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:18:36,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6262466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:36,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:36,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2022-11-21 16:18:36,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913858453] [2022-11-21 16:18:36,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:36,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 16:18:36,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 16:18:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 16:18:36,959 INFO L87 Difference]: Start difference. First operand 14984 states and 19804 transitions. Second operand has 33 states, 33 states have (on average 6.787878787878788) internal successors, (224), 33 states have internal predecessors, (224), 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) [2022-11-21 16:19:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:22,959 INFO L93 Difference]: Finished difference Result 208031 states and 267623 transitions. [2022-11-21 16:19:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-21 16:19:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.787878787878788) internal successors, (224), 33 states have internal predecessors, (224), 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 83 [2022-11-21 16:19:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:23,536 INFO L225 Difference]: With dead ends: 208031 [2022-11-21 16:19:23,536 INFO L226 Difference]: Without dead ends: 193948 [2022-11-21 16:19:23,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6109 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3055, Invalid=15305, Unknown=0, NotChecked=0, Total=18360 [2022-11-21 16:19:23,654 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 3408 mSDsluCounter, 4106 mSDsCounter, 0 mSdLazyCounter, 4019 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 4468 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:23,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3408 Valid, 4468 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4019 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-21 16:19:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193948 states.