./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.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_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/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_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/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_6f4ac887-556c-4c57-b3d4-01db614ce769/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 c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 --- 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 16:33:28,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:33:28,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:33:28,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:33:28,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:33:28,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:33:28,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:33:28,841 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:33:28,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:33:28,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:33:28,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:33:28,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:33:28,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:33:28,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:33:28,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:33:28,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:33:28,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:33:28,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:33:28,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:33:28,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:33:28,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:33:28,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:33:28,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:33:28,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:33:28,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:33:28,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:33:28,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:33:28,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:33:28,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:33:28,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:33:28,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:33:28,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:33:28,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:33:28,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:33:28,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:33:28,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:33:28,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:33:28,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:33:28,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:33:28,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:33:28,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:33:28,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:33:28,931 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:33:28,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:33:28,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:33:28,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:33:28,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:33:28,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:33:28,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:33:28,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:33:28,935 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:33:28,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:33:28,936 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:33:28,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:33:28,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:33:28,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:33:28,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:33:28,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:33:28,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:33:28,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:33:28,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:33:28,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:33:28,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:33:28,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:33:28,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:33:28,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:33:28,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:28,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:33:28,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:33:28,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:33:28,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:33:28,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:33:28,941 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:33:28,941 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:33:28,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:33:28,942 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_6f4ac887-556c-4c57-b3d4-01db614ce769/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 [2022-11-21 16:33:29,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:33:29,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:33:29,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:33:29,279 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:33:29,280 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:33:29,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2022-11-21 16:33:32,395 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:33:32,646 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:33:32,647 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2022-11-21 16:33:32,655 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/data/d8122b23f/a983fcfbccff46d5badf771faf9bfe1c/FLAGc7ba9cbb3 [2022-11-21 16:33:32,670 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/data/d8122b23f/a983fcfbccff46d5badf771faf9bfe1c [2022-11-21 16:33:32,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:33:32,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:33:32,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:32,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:33:32,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:33:32,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:32" (1/1) ... [2022-11-21 16:33:32,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be51a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:32, skipping insertion in model container [2022-11-21 16:33:32,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:33:32" (1/1) ... [2022-11-21 16:33:32,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:33:32,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:33:32,937 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_6f4ac887-556c-4c57-b3d4-01db614ce769/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2022-11-21 16:33:32,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:32,960 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:33:33,010 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_6f4ac887-556c-4c57-b3d4-01db614ce769/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2022-11-21 16:33:33,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:33:33,026 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:33:33,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33 WrapperNode [2022-11-21 16:33:33,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:33:33,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:33:33,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:33:33,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:33:33,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,077 INFO L138 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 285 [2022-11-21 16:33:33,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:33:33,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:33:33,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:33:33,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:33:33,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:33:33,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:33:33,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:33:33,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:33:33,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (1/1) ... [2022-11-21 16:33:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:33:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:33,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:33:33,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:33:33,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:33:33,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:33:33,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:33:33,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:33:33,353 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:33:33,355 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:33:33,944 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:33:33,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:33:33,960 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:33:33,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:33:33 BoogieIcfgContainer [2022-11-21 16:33:33,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:33:33,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:33:33,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:33:33,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:33:33,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:33:32" (1/3) ... [2022-11-21 16:33:33,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4bcb26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:33:33, skipping insertion in model container [2022-11-21 16:33:33,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:33:33" (2/3) ... [2022-11-21 16:33:33,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4bcb26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:33:33, skipping insertion in model container [2022-11-21 16:33:33,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:33:33" (3/3) ... [2022-11-21 16:33:33,979 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2022-11-21 16:33:33,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:33:33,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:33:34,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:33:34,086 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;@17ec709e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:33:34,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:33:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 81 states have (on average 1.728395061728395) internal successors, (140), 82 states have internal predecessors, (140), 0 states have call successors, (0), 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 16:33:34,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:33:34,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:34,100 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 16:33:34,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1248948005, now seen corresponding path program 1 times [2022-11-21 16:33:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:34,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365050662] [2022-11-21 16:33:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:34,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:34,351 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 16:33:34,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365050662] [2022-11-21 16:33:34,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365050662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:34,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:34,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:33:34,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669462219] [2022-11-21 16:33:34,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:34,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:33:34,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:33:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:33:34,407 INFO L87 Difference]: Start difference. First operand has 83 states, 81 states have (on average 1.728395061728395) internal successors, (140), 82 states have internal predecessors, (140), 0 states have call successors, (0), 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 16:33:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:34,445 INFO L93 Difference]: Finished difference Result 137 states and 226 transitions. [2022-11-21 16:33:34,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:33:34,448 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 16:33:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:34,458 INFO L225 Difference]: With dead ends: 137 [2022-11-21 16:33:34,458 INFO L226 Difference]: Without dead ends: 79 [2022-11-21 16:33:34,460 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 16:33:34,464 INFO L413 NwaCegarLoop]: 137 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, 137 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 16:33:34,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-21 16:33:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-21 16:33:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.705128205128205) internal successors, (133), 78 states have internal predecessors, (133), 0 states have call successors, (0), 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 16:33:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 133 transitions. [2022-11-21 16:33:34,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 133 transitions. Word has length 29 [2022-11-21 16:33:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:34,501 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 133 transitions. [2022-11-21 16:33:34,502 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 16:33:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 133 transitions. [2022-11-21 16:33:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-21 16:33:34,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:34,504 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 16:33:34,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:33:34,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:34,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1382961511, now seen corresponding path program 1 times [2022-11-21 16:33:34,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:34,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917326009] [2022-11-21 16:33:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:34,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:34,744 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 16:33:34,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917326009] [2022-11-21 16:33:34,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917326009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:34,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:33:34,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961618675] [2022-11-21 16:33:34,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:34,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:33:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:34,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:33:34,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:33:34,750 INFO L87 Difference]: Start difference. First operand 79 states and 133 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 16:33:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:34,903 INFO L93 Difference]: Finished difference Result 181 states and 295 transitions. [2022-11-21 16:33:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:34,909 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 16:33:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:34,910 INFO L225 Difference]: With dead ends: 181 [2022-11-21 16:33:34,910 INFO L226 Difference]: Without dead ends: 128 [2022-11-21 16:33:34,911 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 16:33:34,912 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 81 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:34,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 487 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:33:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-21 16:33:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-11-21 16:33:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3974358974358974) internal successors, (109), 78 states have internal predecessors, (109), 0 states have call successors, (0), 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 16:33:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2022-11-21 16:33:34,922 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 29 [2022-11-21 16:33:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:34,922 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2022-11-21 16:33:34,922 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 16:33:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2022-11-21 16:33:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:33:34,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:34,932 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 16:33:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:33:34,935 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash -393924974, now seen corresponding path program 1 times [2022-11-21 16:33:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:34,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577503283] [2022-11-21 16:33:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:35,235 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 16:33:35,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:35,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577503283] [2022-11-21 16:33:35,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577503283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:35,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:33:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398268236] [2022-11-21 16:33:35,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:35,238 INFO L87 Difference]: Start difference. First operand 79 states and 109 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 16:33:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:35,365 INFO L93 Difference]: Finished difference Result 324 states and 504 transitions. [2022-11-21 16:33:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:35,366 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 16:33:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:35,369 INFO L225 Difference]: With dead ends: 324 [2022-11-21 16:33:35,369 INFO L226 Difference]: Without dead ends: 275 [2022-11-21 16:33:35,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:33:35,371 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 728 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:35,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 521 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-21 16:33:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 126. [2022-11-21 16:33:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.48) internal successors, (185), 125 states have internal predecessors, (185), 0 states have call successors, (0), 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 16:33:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 185 transitions. [2022-11-21 16:33:35,391 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 185 transitions. Word has length 52 [2022-11-21 16:33:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:35,392 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 185 transitions. [2022-11-21 16:33:35,392 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 16:33:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 185 transitions. [2022-11-21 16:33:35,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:33:35,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:35,394 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 16:33:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:33:35,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 289904313, now seen corresponding path program 1 times [2022-11-21 16:33:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564658416] [2022-11-21 16:33:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:35,834 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 16:33:35,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:35,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564658416] [2022-11-21 16:33:35,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564658416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:35,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:35,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:33:35,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126914924] [2022-11-21 16:33:35,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:33:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:33:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:33:35,840 INFO L87 Difference]: Start difference. First operand 126 states and 185 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 16:33:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:36,010 INFO L93 Difference]: Finished difference Result 230 states and 348 transitions. [2022-11-21 16:33:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:33:36,012 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 16:33:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:36,014 INFO L225 Difference]: With dead ends: 230 [2022-11-21 16:33:36,014 INFO L226 Difference]: Without dead ends: 228 [2022-11-21 16:33:36,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:33:36,016 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 390 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:36,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 710 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-21 16:33:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 132. [2022-11-21 16:33:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 131 states have internal predecessors, (191), 0 states have call successors, (0), 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 16:33:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 191 transitions. [2022-11-21 16:33:36,041 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 191 transitions. Word has length 53 [2022-11-21 16:33:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:36,043 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 191 transitions. [2022-11-21 16:33:36,044 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 16:33:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 191 transitions. [2022-11-21 16:33:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:33:36,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:36,045 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 16:33:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:33:36,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 449677642, now seen corresponding path program 1 times [2022-11-21 16:33:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156241529] [2022-11-21 16:33:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:36,190 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 16:33:36,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:36,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156241529] [2022-11-21 16:33:36,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156241529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:36,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:36,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170088944] [2022-11-21 16:33:36,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:36,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:36,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:36,195 INFO L87 Difference]: Start difference. First operand 132 states and 191 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 16:33:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:36,237 INFO L93 Difference]: Finished difference Result 321 states and 488 transitions. [2022-11-21 16:33:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:36,238 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 16:33:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:36,240 INFO L225 Difference]: With dead ends: 321 [2022-11-21 16:33:36,240 INFO L226 Difference]: Without dead ends: 219 [2022-11-21 16:33:36,243 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 16:33:36,249 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 48 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:36,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 185 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-21 16:33:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2022-11-21 16:33:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5) internal successors, (324), 216 states have internal predecessors, (324), 0 states have call successors, (0), 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 16:33:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 324 transitions. [2022-11-21 16:33:36,292 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 324 transitions. Word has length 54 [2022-11-21 16:33:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:36,293 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 324 transitions. [2022-11-21 16:33:36,297 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 16:33:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 324 transitions. [2022-11-21 16:33:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:33:36,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:36,305 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 16:33:36,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:33:36,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:36,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1924873422, now seen corresponding path program 1 times [2022-11-21 16:33:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:36,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033907613] [2022-11-21 16:33:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:36,371 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 16:33:36,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:36,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033907613] [2022-11-21 16:33:36,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033907613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:36,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:36,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:36,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74942221] [2022-11-21 16:33:36,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:36,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:36,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:36,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:36,374 INFO L87 Difference]: Start difference. First operand 217 states and 324 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 16:33:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:36,412 INFO L93 Difference]: Finished difference Result 409 states and 625 transitions. [2022-11-21 16:33:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:36,413 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 16:33:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:36,414 INFO L225 Difference]: With dead ends: 409 [2022-11-21 16:33:36,414 INFO L226 Difference]: Without dead ends: 307 [2022-11-21 16:33:36,415 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 16:33:36,416 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 67 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 247 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 16:33:36,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 247 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-21 16:33:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2022-11-21 16:33:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.513157894736842) internal successors, (460), 304 states have internal predecessors, (460), 0 states have call successors, (0), 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 16:33:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 460 transitions. [2022-11-21 16:33:36,445 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 460 transitions. Word has length 54 [2022-11-21 16:33:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:36,446 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 460 transitions. [2022-11-21 16:33:36,446 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 16:33:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 460 transitions. [2022-11-21 16:33:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:33:36,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:36,447 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 16:33:36,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:33:36,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash 20994386, now seen corresponding path program 1 times [2022-11-21 16:33:36,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727642392] [2022-11-21 16:33:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:36,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:36,519 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 16:33:36,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:36,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727642392] [2022-11-21 16:33:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727642392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:36,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:36,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:36,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689309363] [2022-11-21 16:33:36,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:36,522 INFO L87 Difference]: Start difference. First operand 305 states and 460 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 16:33:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:36,592 INFO L93 Difference]: Finished difference Result 803 states and 1232 transitions. [2022-11-21 16:33:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:36,594 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 16:33:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:36,598 INFO L225 Difference]: With dead ends: 803 [2022-11-21 16:33:36,598 INFO L226 Difference]: Without dead ends: 530 [2022-11-21 16:33:36,600 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 16:33:36,603 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 55 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 219 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 16:33:36,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-11-21 16:33:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 528. [2022-11-21 16:33:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.5123339658444024) internal successors, (797), 527 states have internal predecessors, (797), 0 states have call successors, (0), 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 16:33:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 797 transitions. [2022-11-21 16:33:36,658 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 797 transitions. Word has length 55 [2022-11-21 16:33:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:36,659 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 797 transitions. [2022-11-21 16:33:36,659 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 16:33:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 797 transitions. [2022-11-21 16:33:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:33:36,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:36,660 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 16:33:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:33:36,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1779694542, now seen corresponding path program 1 times [2022-11-21 16:33:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:36,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096559832] [2022-11-21 16:33:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:36,743 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 16:33:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096559832] [2022-11-21 16:33:36,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096559832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:36,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:36,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842536112] [2022-11-21 16:33:36,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:36,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:36,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:36,746 INFO L87 Difference]: Start difference. First operand 528 states and 797 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 16:33:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:36,846 INFO L93 Difference]: Finished difference Result 1424 states and 2159 transitions. [2022-11-21 16:33:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:36,846 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 16:33:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:36,851 INFO L225 Difference]: With dead ends: 1424 [2022-11-21 16:33:36,852 INFO L226 Difference]: Without dead ends: 928 [2022-11-21 16:33:36,852 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 16:33:36,854 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 59 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 232 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 16:33:36,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 232 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-21 16:33:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 926. [2022-11-21 16:33:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.492972972972973) internal successors, (1381), 925 states have internal predecessors, (1381), 0 states have call successors, (0), 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 16:33:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1381 transitions. [2022-11-21 16:33:36,958 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1381 transitions. Word has length 55 [2022-11-21 16:33:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:36,958 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 1381 transitions. [2022-11-21 16:33:36,959 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 16:33:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1381 transitions. [2022-11-21 16:33:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:33:36,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:36,960 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 16:33:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:33:36,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1158102802, now seen corresponding path program 1 times [2022-11-21 16:33:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:36,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857570551] [2022-11-21 16:33:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:37,011 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 16:33:37,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:37,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857570551] [2022-11-21 16:33:37,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857570551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:37,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:37,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:37,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377945953] [2022-11-21 16:33:37,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:37,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:37,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:37,014 INFO L87 Difference]: Start difference. First operand 926 states and 1381 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 16:33:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:37,235 INFO L93 Difference]: Finished difference Result 2522 states and 3743 transitions. [2022-11-21 16:33:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:37,235 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 16:33:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:37,241 INFO L225 Difference]: With dead ends: 2522 [2022-11-21 16:33:37,241 INFO L226 Difference]: Without dead ends: 1628 [2022-11-21 16:33:37,243 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 16:33:37,243 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 63 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 245 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 16:33:37,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 245 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-11-21 16:33:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1626. [2022-11-21 16:33:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 1.4578461538461538) internal successors, (2369), 1625 states have internal predecessors, (2369), 0 states have call successors, (0), 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 16:33:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2369 transitions. [2022-11-21 16:33:37,489 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2369 transitions. Word has length 55 [2022-11-21 16:33:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:37,490 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2369 transitions. [2022-11-21 16:33:37,490 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 16:33:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2369 transitions. [2022-11-21 16:33:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 16:33:37,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:37,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:33:37,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:33:37,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:37,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash -956676580, now seen corresponding path program 1 times [2022-11-21 16:33:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:37,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95667857] [2022-11-21 16:33:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:37,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:33:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95667857] [2022-11-21 16:33:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95667857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:37,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:37,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:37,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170838613] [2022-11-21 16:33:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:37,662 INFO L87 Difference]: Start difference. First operand 1626 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:37,901 INFO L93 Difference]: Finished difference Result 3222 states and 4707 transitions. [2022-11-21 16:33:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:37,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-21 16:33:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:37,907 INFO L225 Difference]: With dead ends: 3222 [2022-11-21 16:33:37,907 INFO L226 Difference]: Without dead ends: 1628 [2022-11-21 16:33:37,909 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 16:33:37,910 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 52 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 234 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 16:33:37,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 234 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-11-21 16:33:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1626. [2022-11-21 16:33:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 1.4430769230769231) internal successors, (2345), 1625 states have internal predecessors, (2345), 0 states have call successors, (0), 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 16:33:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2345 transitions. [2022-11-21 16:33:38,147 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2345 transitions. Word has length 77 [2022-11-21 16:33:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:38,148 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 2345 transitions. [2022-11-21 16:33:38,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2345 transitions. [2022-11-21 16:33:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 16:33:38,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:38,155 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] [2022-11-21 16:33:38,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:33:38,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash 442828187, now seen corresponding path program 1 times [2022-11-21 16:33:38,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593514937] [2022-11-21 16:33:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:38,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:38,316 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 16:33:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593514937] [2022-11-21 16:33:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593514937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:38,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:38,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085657080] [2022-11-21 16:33:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:38,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:38,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:38,318 INFO L87 Difference]: Start difference. First operand 1626 states and 2345 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:38,424 INFO L93 Difference]: Finished difference Result 2426 states and 3503 transitions. [2022-11-21 16:33:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:38,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-21 16:33:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:38,428 INFO L225 Difference]: With dead ends: 2426 [2022-11-21 16:33:38,428 INFO L226 Difference]: Without dead ends: 832 [2022-11-21 16:33:38,432 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 16:33:38,432 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 46 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 215 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 16:33:38,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 215 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-21 16:33:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 830. [2022-11-21 16:33:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 1.4197828709288298) internal successors, (1177), 829 states have internal predecessors, (1177), 0 states have call successors, (0), 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 16:33:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1177 transitions. [2022-11-21 16:33:38,528 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1177 transitions. Word has length 77 [2022-11-21 16:33:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:38,528 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 1177 transitions. [2022-11-21 16:33:38,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1177 transitions. [2022-11-21 16:33:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 16:33:38,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:38,530 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] [2022-11-21 16:33:38,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:33:38,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1042195302, now seen corresponding path program 1 times [2022-11-21 16:33:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:38,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579566357] [2022-11-21 16:33:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:38,661 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 16:33:38,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:38,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579566357] [2022-11-21 16:33:38,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579566357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:38,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:38,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746322945] [2022-11-21 16:33:38,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:38,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:38,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:38,664 INFO L87 Difference]: Start difference. First operand 830 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:38,721 INFO L93 Difference]: Finished difference Result 1232 states and 1751 transitions. [2022-11-21 16:33:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2022-11-21 16:33:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:38,723 INFO L225 Difference]: With dead ends: 1232 [2022-11-21 16:33:38,724 INFO L226 Difference]: Without dead ends: 434 [2022-11-21 16:33:38,725 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 16:33:38,725 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 40 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 196 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 16:33:38,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-21 16:33:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-11-21 16:33:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.3897911832946637) internal successors, (599), 431 states have internal predecessors, (599), 0 states have call successors, (0), 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 16:33:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 599 transitions. [2022-11-21 16:33:38,775 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 599 transitions. Word has length 77 [2022-11-21 16:33:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:38,775 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 599 transitions. [2022-11-21 16:33:38,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 599 transitions. [2022-11-21 16:33:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 16:33:38,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:38,776 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] [2022-11-21 16:33:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:33:38,777 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -655946983, now seen corresponding path program 1 times [2022-11-21 16:33:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248272815] [2022-11-21 16:33:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:38,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:39,506 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 16:33:39,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248272815] [2022-11-21 16:33:39,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248272815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:33:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515323059] [2022-11-21 16:33:39,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:39,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:33:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:39,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:33:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:33:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:33:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:39,933 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 16:33:39,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:40,312 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 16:33:40,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515323059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:40,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:33:40,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2022-11-21 16:33:40,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015728681] [2022-11-21 16:33:40,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:40,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:33:40,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:33:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:33:40,315 INFO L87 Difference]: Start difference. First operand 432 states and 599 transitions. Second operand has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 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 16:33:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:45,313 INFO L93 Difference]: Finished difference Result 4304 states and 6033 transitions. [2022-11-21 16:33:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:33:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 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 77 [2022-11-21 16:33:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:45,327 INFO L225 Difference]: With dead ends: 4304 [2022-11-21 16:33:45,328 INFO L226 Difference]: Without dead ends: 4026 [2022-11-21 16:33:45,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=906, Invalid=3650, Unknown=0, NotChecked=0, Total=4556 [2022-11-21 16:33:45,331 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 4593 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4593 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:45,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4593 Valid, 1666 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 16:33:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-21 16:33:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2467. [2022-11-21 16:33:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 1.3990267639902676) internal successors, (3450), 2466 states have internal predecessors, (3450), 0 states have call successors, (0), 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 16:33:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3450 transitions. [2022-11-21 16:33:45,674 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3450 transitions. Word has length 77 [2022-11-21 16:33:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:45,674 INFO L495 AbstractCegarLoop]: Abstraction has 2467 states and 3450 transitions. [2022-11-21 16:33:45,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 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 16:33:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3450 transitions. [2022-11-21 16:33:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:33:45,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:45,676 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] [2022-11-21 16:33:45,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:33:45,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:33:45,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash 441101442, now seen corresponding path program 1 times [2022-11-21 16:33:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:45,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551603432] [2022-11-21 16:33:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:33:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551603432] [2022-11-21 16:33:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551603432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:46,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:46,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:33:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431110907] [2022-11-21 16:33:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:46,012 INFO L87 Difference]: Start difference. First operand 2467 states and 3450 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 16:33:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:46,784 INFO L93 Difference]: Finished difference Result 7335 states and 10342 transitions. [2022-11-21 16:33:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:46,784 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 16:33:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:46,803 INFO L225 Difference]: With dead ends: 7335 [2022-11-21 16:33:46,803 INFO L226 Difference]: Without dead ends: 6055 [2022-11-21 16:33:46,806 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 16:33:46,807 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 503 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:46,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 587 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:33:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2022-11-21 16:33:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 3649. [2022-11-21 16:33:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 1.3958333333333333) internal successors, (5092), 3648 states have internal predecessors, (5092), 0 states have call successors, (0), 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 16:33:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 5092 transitions. [2022-11-21 16:33:47,256 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 5092 transitions. Word has length 78 [2022-11-21 16:33:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:47,257 INFO L495 AbstractCegarLoop]: Abstraction has 3649 states and 5092 transitions. [2022-11-21 16:33:47,257 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 16:33:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 5092 transitions. [2022-11-21 16:33:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:33:47,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:47,258 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] [2022-11-21 16:33:47,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:33:47,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1763822842, now seen corresponding path program 1 times [2022-11-21 16:33:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:47,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128528733] [2022-11-21 16:33:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:47,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:33:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128528733] [2022-11-21 16:33:47,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128528733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:47,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:47,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:33:47,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997411638] [2022-11-21 16:33:47,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:47,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:47,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:47,382 INFO L87 Difference]: Start difference. First operand 3649 states and 5092 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 16:33:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:48,086 INFO L93 Difference]: Finished difference Result 8517 states and 11984 transitions. [2022-11-21 16:33:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 16:33:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:48,114 INFO L225 Difference]: With dead ends: 8517 [2022-11-21 16:33:48,114 INFO L226 Difference]: Without dead ends: 7237 [2022-11-21 16:33:48,117 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 16:33:48,117 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 502 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:48,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 584 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7237 states. [2022-11-21 16:33:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7237 to 4831. [2022-11-21 16:33:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.3942028985507247) internal successors, (6734), 4830 states have internal predecessors, (6734), 0 states have call successors, (0), 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 16:33:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6734 transitions. [2022-11-21 16:33:48,729 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6734 transitions. Word has length 78 [2022-11-21 16:33:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:48,730 INFO L495 AbstractCegarLoop]: Abstraction has 4831 states and 6734 transitions. [2022-11-21 16:33:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 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 16:33:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6734 transitions. [2022-11-21 16:33:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:33:48,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:48,731 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] [2022-11-21 16:33:48,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:33:48,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 415799108, now seen corresponding path program 1 times [2022-11-21 16:33:48,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:48,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101323813] [2022-11-21 16:33:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 16:33:48,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:48,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101323813] [2022-11-21 16:33:48,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101323813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:48,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:48,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:33:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040141938] [2022-11-21 16:33:48,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:48,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:48,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:48,888 INFO L87 Difference]: Start difference. First operand 4831 states and 6734 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 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 16:33:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:50,034 INFO L93 Difference]: Finished difference Result 9699 states and 13626 transitions. [2022-11-21 16:33:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 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 16:33:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:50,071 INFO L225 Difference]: With dead ends: 9699 [2022-11-21 16:33:50,071 INFO L226 Difference]: Without dead ends: 8419 [2022-11-21 16:33:50,074 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 16:33:50,075 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 446 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:50,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 687 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:33:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2022-11-21 16:33:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 6013. [2022-11-21 16:33:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 6012 states have (on average 1.3932135728542914) internal successors, (8376), 6012 states have internal predecessors, (8376), 0 states have call successors, (0), 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 16:33:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 8376 transitions. [2022-11-21 16:33:50,996 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 8376 transitions. Word has length 78 [2022-11-21 16:33:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:50,997 INFO L495 AbstractCegarLoop]: Abstraction has 6013 states and 8376 transitions. [2022-11-21 16:33:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 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 16:33:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 8376 transitions. [2022-11-21 16:33:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 16:33:50,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:50,998 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] [2022-11-21 16:33:50,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:33:50,998 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:50,999 INFO L85 PathProgramCache]: Analyzing trace with hash 627479521, now seen corresponding path program 1 times [2022-11-21 16:33:50,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:50,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937073203] [2022-11-21 16:33:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:51,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:51,127 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 16:33:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937073203] [2022-11-21 16:33:51,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937073203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:51,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:51,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:33:51,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711121811] [2022-11-21 16:33:51,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:51,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:33:51,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:33:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:33:51,129 INFO L87 Difference]: Start difference. First operand 6013 states and 8376 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:52,372 INFO L93 Difference]: Finished difference Result 10480 states and 14690 transitions. [2022-11-21 16:33:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:33:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:52,390 INFO L225 Difference]: With dead ends: 10480 [2022-11-21 16:33:52,391 INFO L226 Difference]: Without dead ends: 9458 [2022-11-21 16:33:52,393 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 16:33:52,394 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 499 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:33:52,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 681 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9458 states. [2022-11-21 16:33:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9458 to 7052. [2022-11-21 16:33:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7051 states have (on average 1.3918593107360657) internal successors, (9814), 7051 states have internal predecessors, (9814), 0 states have call successors, (0), 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 16:33:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 9814 transitions. [2022-11-21 16:33:53,386 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 9814 transitions. Word has length 78 [2022-11-21 16:33:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:53,387 INFO L495 AbstractCegarLoop]: Abstraction has 7052 states and 9814 transitions. [2022-11-21 16:33:53,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 16:33:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 9814 transitions. [2022-11-21 16:33:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-21 16:33:53,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:53,389 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 16:33:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:33:53,389 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:53,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:53,390 INFO L85 PathProgramCache]: Analyzing trace with hash 753579009, now seen corresponding path program 1 times [2022-11-21 16:33:53,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157067402] [2022-11-21 16:33:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:53,510 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 16:33:53,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:53,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157067402] [2022-11-21 16:33:53,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157067402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:33:53,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:33:53,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:33:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111255285] [2022-11-21 16:33:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:33:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:33:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:33:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:33:53,514 INFO L87 Difference]: Start difference. First operand 7052 states and 9814 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 16:33:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:33:54,033 INFO L93 Difference]: Finished difference Result 10149 states and 14046 transitions. [2022-11-21 16:33:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:33:54,039 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 16:33:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:33:54,045 INFO L225 Difference]: With dead ends: 10149 [2022-11-21 16:33:54,045 INFO L226 Difference]: Without dead ends: 3129 [2022-11-21 16:33:54,050 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 16:33:54,050 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 24 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 191 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 16:33:54,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 191 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:33:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2022-11-21 16:33:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3019. [2022-11-21 16:33:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3018 states have (on average 1.351557322730285) internal successors, (4079), 3018 states have internal predecessors, (4079), 0 states have call successors, (0), 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 16:33:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4079 transitions. [2022-11-21 16:33:54,453 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4079 transitions. Word has length 81 [2022-11-21 16:33:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:33:54,454 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 4079 transitions. [2022-11-21 16:33:54,454 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 16:33:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4079 transitions. [2022-11-21 16:33:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-21 16:33:54,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:33:54,456 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] [2022-11-21 16:33:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 16:33:54,456 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:33:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:33:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1955141054, now seen corresponding path program 1 times [2022-11-21 16:33:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:33:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051134782] [2022-11-21 16:33:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:33:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:54,842 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 16:33:54,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:33:54,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051134782] [2022-11-21 16:33:54,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051134782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:33:54,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101163928] [2022-11-21 16:33:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:33:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:33:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:33:54,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:33:54,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:33:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:33:54,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:33:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:33:55,999 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 16:33:55,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:33:57,427 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 16:33:57,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101163928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:33:57,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:33:57,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-21 16:33:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74837221] [2022-11-21 16:33:57,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:33:57,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:33:57,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:33:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:33:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:33:57,431 INFO L87 Difference]: Start difference. First operand 3019 states and 4079 transitions. Second operand has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:34:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:11,458 INFO L93 Difference]: Finished difference Result 48186 states and 62652 transitions. [2022-11-21 16:34:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-21 16:34:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:34:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:11,566 INFO L225 Difference]: With dead ends: 48186 [2022-11-21 16:34:11,566 INFO L226 Difference]: Without dead ends: 45343 [2022-11-21 16:34:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2449, Invalid=10661, Unknown=0, NotChecked=0, Total=13110 [2022-11-21 16:34:11,583 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 4864 mSDsluCounter, 2014 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4864 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:11,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4864 Valid, 2211 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 16:34:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45343 states. [2022-11-21 16:34:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45343 to 20348. [2022-11-21 16:34:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20348 states, 20347 states have (on average 1.3282547795743844) internal successors, (27026), 20347 states have internal predecessors, (27026), 0 states have call successors, (0), 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 16:34:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20348 states to 20348 states and 27026 transitions. [2022-11-21 16:34:14,937 INFO L78 Accepts]: Start accepts. Automaton has 20348 states and 27026 transitions. Word has length 81 [2022-11-21 16:34:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:14,938 INFO L495 AbstractCegarLoop]: Abstraction has 20348 states and 27026 transitions. [2022-11-21 16:34:14,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.807692307692308) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 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 16:34:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 20348 states and 27026 transitions. [2022-11-21 16:34:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-21 16:34:14,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:14,941 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] [2022-11-21 16:34:14,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:34:15,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f4ac887-556c-4c57-b3d4-01db614ce769/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:15,148 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash 277056793, now seen corresponding path program 1 times [2022-11-21 16:34:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:15,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351825474] [2022-11-21 16:34:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:15,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351825474] [2022-11-21 16:34:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351825474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:15,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:15,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:34:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292612918] [2022-11-21 16:34:15,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:34:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:34:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:34:15,216 INFO L87 Difference]: Start difference. First operand 20348 states and 27026 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 16:34:20,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:20,926 INFO L93 Difference]: Finished difference Result 56190 states and 74347 transitions. [2022-11-21 16:34:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:34:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-21 16:34:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:20,988 INFO L225 Difference]: With dead ends: 56190 [2022-11-21 16:34:20,989 INFO L226 Difference]: Without dead ends: 36300 [2022-11-21 16:34:21,010 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 16:34:21,010 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 53 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:21,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 208 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:34:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36300 states. [2022-11-21 16:34:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36300 to 36298. [2022-11-21 16:34:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36298 states, 36297 states have (on average 1.3060308014436455) internal successors, (47405), 36297 states have internal predecessors, (47405), 0 states have call successors, (0), 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 16:34:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36298 states to 36298 states and 47405 transitions. [2022-11-21 16:34:26,907 INFO L78 Accepts]: Start accepts. Automaton has 36298 states and 47405 transitions. Word has length 82 [2022-11-21 16:34:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:26,908 INFO L495 AbstractCegarLoop]: Abstraction has 36298 states and 47405 transitions. [2022-11-21 16:34:26,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 16:34:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 36298 states and 47405 transitions. [2022-11-21 16:34:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-21 16:34:26,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:26,912 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] [2022-11-21 16:34:26,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 16:34:26,912 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1185568505, now seen corresponding path program 1 times [2022-11-21 16:34:26,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:26,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606304336] [2022-11-21 16:34:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:26,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:26,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606304336] [2022-11-21 16:34:26,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606304336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:26,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:26,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:34:26,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289859973] [2022-11-21 16:34:26,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:26,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:34:26,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:26,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:34:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:34:26,980 INFO L87 Difference]: Start difference. First operand 36298 states and 47405 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 16:34:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:34:34,820 INFO L93 Difference]: Finished difference Result 95176 states and 124162 transitions. [2022-11-21 16:34:34,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:34:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-11-21 16:34:34,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:34:34,914 INFO L225 Difference]: With dead ends: 95176 [2022-11-21 16:34:34,915 INFO L226 Difference]: Without dead ends: 60919 [2022-11-21 16:34:34,950 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 16:34:34,951 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 44 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:34:34,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:34:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60919 states. [2022-11-21 16:34:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60919 to 60917. [2022-11-21 16:34:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60917 states, 60916 states have (on average 1.2859347297918444) internal successors, (78334), 60916 states have internal predecessors, (78334), 0 states have call successors, (0), 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 16:34:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60917 states to 60917 states and 78334 transitions. [2022-11-21 16:34:44,820 INFO L78 Accepts]: Start accepts. Automaton has 60917 states and 78334 transitions. Word has length 82 [2022-11-21 16:34:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:34:44,820 INFO L495 AbstractCegarLoop]: Abstraction has 60917 states and 78334 transitions. [2022-11-21 16:34:44,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 16:34:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 60917 states and 78334 transitions. [2022-11-21 16:34:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-21 16:34:44,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:34:44,828 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] [2022-11-21 16:34:44,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:34:44,828 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:34:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:44,829 INFO L85 PathProgramCache]: Analyzing trace with hash -493419699, now seen corresponding path program 1 times [2022-11-21 16:34:44,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:44,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501763298] [2022-11-21 16:34:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:44,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:45,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:45,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501763298] [2022-11-21 16:34:45,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501763298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:45,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:45,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:34:45,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101055996] [2022-11-21 16:34:45,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:45,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:34:45,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:34:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:34:45,056 INFO L87 Difference]: Start difference. First operand 60917 states and 78334 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)