./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8 --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 52f795f47ad9dd0b1b0499f649b5f623fed211e53433ed6d87534c63dbfae98b --- 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-e04fb08 [2022-11-16 11:07:51,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:07:51,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:07:52,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:07:52,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:07:52,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:07:52,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:07:52,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:07:52,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:07:52,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:07:52,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:07:52,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:07:52,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:07:52,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:07:52,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:07:52,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:07:52,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:07:52,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:07:52,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:07:52,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:07:52,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:07:52,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:07:52,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:07:52,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:07:52,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:07:52,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:07:52,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:07:52,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:07:52,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:07:52,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:07:52,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:07:52,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:07:52,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:07:52,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:07:52,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:07:52,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:07:52,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:07:52,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:07:52,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:07:52,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:07:52,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:07:52,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:07:52,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:07:52,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:07:52,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:07:52,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:07:52,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:07:52,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:07:52,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:07:52,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:07:52,166 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:07:52,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:07:52,168 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:07:52,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:07:52,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:07:52,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:07:52,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:07:52,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:07:52,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:07:52,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:07:52,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:07:52,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:07:52,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:07:52,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:07:52,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:07:52,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:07:52,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:07:52,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:07:52,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:07:52,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:07:52,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:07:52,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:07:52,174 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:07:52,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:07:52,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:07:52,175 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_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52f795f47ad9dd0b1b0499f649b5f623fed211e53433ed6d87534c63dbfae98b [2022-11-16 11:07:52,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:07:52,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:07:52,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:07:52,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:07:52,527 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:07:52,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c [2022-11-16 11:07:52,594 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/data/50f0eab53/25e512e3fcff4e1c9814dcd2eb2e1ad4/FLAG42673201e [2022-11-16 11:07:53,204 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:07:53,205 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c [2022-11-16 11:07:53,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/data/50f0eab53/25e512e3fcff4e1c9814dcd2eb2e1ad4/FLAG42673201e [2022-11-16 11:07:53,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/data/50f0eab53/25e512e3fcff4e1c9814dcd2eb2e1ad4 [2022-11-16 11:07:53,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:07:53,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:07:53,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:07:53,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:07:53,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:07:53,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131f0ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53, skipping insertion in model container [2022-11-16 11:07:53,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:07:53,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:07:53,814 WARN L229 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_502c7c34-7275-4417-b51a-a74d634de474/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c[8305,8318] [2022-11-16 11:07:53,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:07:53,827 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:07:53,871 WARN L229 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_502c7c34-7275-4417-b51a-a74d634de474/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.ufo.UNBOUNDED.pals.c[8305,8318] [2022-11-16 11:07:53,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:07:53,886 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:07:53,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53 WrapperNode [2022-11-16 11:07:53,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:07:53,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:07:53,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:07:53,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:07:53,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,933 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 258 [2022-11-16 11:07:53,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:07:53,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:07:53,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:07:53,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:07:53,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,976 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:07:53,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:07:53,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:07:53,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:07:53,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (1/1) ... [2022-11-16 11:07:53,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:07:54,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:54,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:07:54,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:07:54,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:07:54,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:07:54,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:07:54,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:07:54,176 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:07:54,179 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:07:54,682 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:07:54,689 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:07:54,689 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:07:54,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:07:54 BoogieIcfgContainer [2022-11-16 11:07:54,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:07:54,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:07:54,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:07:54,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:07:54,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:07:53" (1/3) ... [2022-11-16 11:07:54,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e48bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:07:54, skipping insertion in model container [2022-11-16 11:07:54,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:07:53" (2/3) ... [2022-11-16 11:07:54,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e48bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:07:54, skipping insertion in model container [2022-11-16 11:07:54,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:07:54" (3/3) ... [2022-11-16 11:07:54,701 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c [2022-11-16 11:07:54,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:07:54,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:07:54,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:07:54,806 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;@61885274, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:07:54,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:07:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 70 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:07:54,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:54,825 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] [2022-11-16 11:07:54,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:54,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:54,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2021273361, now seen corresponding path program 1 times [2022-11-16 11:07:54,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:54,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190053517] [2022-11-16 11:07:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:55,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190053517] [2022-11-16 11:07:55,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190053517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:55,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:55,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:07:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472496573] [2022-11-16 11:07:55,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:07:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:07:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:07:55,273 INFO L87 Difference]: Start difference. First operand has 71 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 70 states have internal predecessors, (119), 0 states have call successors, (0), 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 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:55,329 INFO L93 Difference]: Finished difference Result 110 states and 183 transitions. [2022-11-16 11:07:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:07:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-16 11:07:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:55,346 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:07:55,347 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 11:07:55,352 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 [2022-11-16 11:07:55,357 INFO L413 NwaCegarLoop]: 112 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, 112 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 [2022-11-16 11:07:55,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 11:07:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-16 11:07:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.696969696969697) internal successors, (112), 66 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 112 transitions. [2022-11-16 11:07:55,420 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 112 transitions. Word has length 21 [2022-11-16 11:07:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:55,421 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 112 transitions. [2022-11-16 11:07:55,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 112 transitions. [2022-11-16 11:07:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:07:55,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:55,425 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] [2022-11-16 11:07:55,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:07:55,425 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1000205007, now seen corresponding path program 1 times [2022-11-16 11:07:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311205628] [2022-11-16 11:07:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:55,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:55,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311205628] [2022-11-16 11:07:55,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311205628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:55,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:55,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:07:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816869696] [2022-11-16 11:07:55,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:55,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:07:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:07:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:07:55,728 INFO L87 Difference]: Start difference. First operand 67 states and 112 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:55,824 INFO L93 Difference]: Finished difference Result 109 states and 176 transitions. [2022-11-16 11:07:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:07:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-16 11:07:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:55,826 INFO L225 Difference]: With dead ends: 109 [2022-11-16 11:07:55,827 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 11:07:55,828 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 [2022-11-16 11:07:55,829 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 3 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:55,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 414 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 11:07:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-16 11:07:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2022-11-16 11:07:55,840 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 21 [2022-11-16 11:07:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:55,841 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2022-11-16 11:07:55,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2022-11-16 11:07:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:07:55,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:55,843 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] [2022-11-16 11:07:55,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:07:55,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1621611306, now seen corresponding path program 1 times [2022-11-16 11:07:55,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:55,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546909816] [2022-11-16 11:07:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546909816] [2022-11-16 11:07:56,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546909816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:56,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:56,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:07:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40059674] [2022-11-16 11:07:56,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:56,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:56,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:56,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:56,045 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:56,270 INFO L93 Difference]: Finished difference Result 371 states and 569 transitions. [2022-11-16 11:07:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:07:56,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-11-16 11:07:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:56,273 INFO L225 Difference]: With dead ends: 371 [2022-11-16 11:07:56,274 INFO L226 Difference]: Without dead ends: 333 [2022-11-16 11:07:56,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:07:56,276 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 576 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:56,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 656 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:07:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-16 11:07:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 103. [2022-11-16 11:07:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4313725490196079) internal successors, (146), 102 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 146 transitions. [2022-11-16 11:07:56,296 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 146 transitions. Word has length 43 [2022-11-16 11:07:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:56,297 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 146 transitions. [2022-11-16 11:07:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 146 transitions. [2022-11-16 11:07:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:07:56,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:56,321 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] [2022-11-16 11:07:56,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:07:56,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2120362406, now seen corresponding path program 1 times [2022-11-16 11:07:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:56,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699689917] [2022-11-16 11:07:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:56,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699689917] [2022-11-16 11:07:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699689917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:56,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:56,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:07:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624010645] [2022-11-16 11:07:56,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:56,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:07:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:07:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:07:56,431 INFO L87 Difference]: Start difference. First operand 103 states and 146 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:56,482 INFO L93 Difference]: Finished difference Result 240 states and 361 transitions. [2022-11-16 11:07:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:07:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-11-16 11:07:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:56,488 INFO L225 Difference]: With dead ends: 240 [2022-11-16 11:07:56,488 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 11:07:56,491 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 [2022-11-16 11:07:56,500 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:56,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 138 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 11:07:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2022-11-16 11:07:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.4658385093167703) internal successors, (236), 161 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 236 transitions. [2022-11-16 11:07:56,542 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 236 transitions. Word has length 45 [2022-11-16 11:07:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:56,543 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 236 transitions. [2022-11-16 11:07:56,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 236 transitions. [2022-11-16 11:07:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:07:56,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:56,545 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] [2022-11-16 11:07:56,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:07:56,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:56,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2053868894, now seen corresponding path program 1 times [2022-11-16 11:07:56,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:56,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725755520] [2022-11-16 11:07:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:56,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725755520] [2022-11-16 11:07:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725755520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:56,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:56,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:07:56,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586869990] [2022-11-16 11:07:56,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:56,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:56,938 INFO L87 Difference]: Start difference. First operand 162 states and 236 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:57,112 INFO L93 Difference]: Finished difference Result 297 states and 444 transitions. [2022-11-16 11:07:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:07:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-11-16 11:07:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:57,114 INFO L225 Difference]: With dead ends: 297 [2022-11-16 11:07:57,114 INFO L226 Difference]: Without dead ends: 164 [2022-11-16 11:07:57,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:07:57,115 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 252 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:57,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 251 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:07:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-16 11:07:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2022-11-16 11:07:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.453416149068323) internal successors, (234), 161 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-11-16 11:07:57,131 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 45 [2022-11-16 11:07:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:57,132 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-11-16 11:07:57,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-11-16 11:07:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:07:57,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:57,134 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] [2022-11-16 11:07:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:07:57,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 339850577, now seen corresponding path program 1 times [2022-11-16 11:07:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:57,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459889506] [2022-11-16 11:07:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:57,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:57,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:57,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459889506] [2022-11-16 11:07:57,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459889506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:57,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:57,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:07:57,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036080557] [2022-11-16 11:07:57,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:57,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:07:57,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:57,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:07:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:07:57,455 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:57,642 INFO L93 Difference]: Finished difference Result 291 states and 428 transitions. [2022-11-16 11:07:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:07:57,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-16 11:07:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:57,644 INFO L225 Difference]: With dead ends: 291 [2022-11-16 11:07:57,644 INFO L226 Difference]: Without dead ends: 289 [2022-11-16 11:07:57,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:07:57,646 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 355 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:57,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 468 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-16 11:07:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 168. [2022-11-16 11:07:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.4311377245508983) internal successors, (239), 167 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 239 transitions. [2022-11-16 11:07:57,691 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 239 transitions. Word has length 46 [2022-11-16 11:07:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:57,692 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 239 transitions. [2022-11-16 11:07:57,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 239 transitions. [2022-11-16 11:07:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:07:57,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:57,694 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] [2022-11-16 11:07:57,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:07:57,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash -473969054, now seen corresponding path program 1 times [2022-11-16 11:07:57,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:57,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855749491] [2022-11-16 11:07:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:57,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:57,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855749491] [2022-11-16 11:07:57,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855749491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:57,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:57,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:07:57,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921584878] [2022-11-16 11:07:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:57,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:07:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:07:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:07:57,807 INFO L87 Difference]: Start difference. First operand 168 states and 239 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:57,860 INFO L93 Difference]: Finished difference Result 430 states and 631 transitions. [2022-11-16 11:07:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:07:57,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-16 11:07:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:57,863 INFO L225 Difference]: With dead ends: 430 [2022-11-16 11:07:57,863 INFO L226 Difference]: Without dead ends: 291 [2022-11-16 11:07:57,865 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 [2022-11-16 11:07:57,867 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 48 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:57,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 191 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-16 11:07:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2022-11-16 11:07:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.4444444444444444) internal successors, (416), 288 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 416 transitions. [2022-11-16 11:07:57,914 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 416 transitions. Word has length 47 [2022-11-16 11:07:57,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:57,915 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 416 transitions. [2022-11-16 11:07:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 416 transitions. [2022-11-16 11:07:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:07:57,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:57,923 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] [2022-11-16 11:07:57,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:07:57,924 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash -908504990, now seen corresponding path program 1 times [2022-11-16 11:07:57,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293724388] [2022-11-16 11:07:57,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:57,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:57,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293724388] [2022-11-16 11:07:57,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293724388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:57,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:57,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:07:57,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11893232] [2022-11-16 11:07:57,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:57,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:07:57,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:07:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:07:57,990 INFO L87 Difference]: Start difference. First operand 289 states and 416 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:58,085 INFO L93 Difference]: Finished difference Result 777 states and 1134 transitions. [2022-11-16 11:07:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:07:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-16 11:07:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:58,090 INFO L225 Difference]: With dead ends: 777 [2022-11-16 11:07:58,091 INFO L226 Difference]: Without dead ends: 517 [2022-11-16 11:07:58,092 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 [2022-11-16 11:07:58,093 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 44 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:58,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 187 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-16 11:07:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 515. [2022-11-16 11:07:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.4357976653696498) internal successors, (738), 514 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 738 transitions. [2022-11-16 11:07:58,226 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 738 transitions. Word has length 47 [2022-11-16 11:07:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:58,228 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 738 transitions. [2022-11-16 11:07:58,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 738 transitions. [2022-11-16 11:07:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:07:58,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:58,231 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] [2022-11-16 11:07:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:07:58,237 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1605529442, now seen corresponding path program 1 times [2022-11-16 11:07:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:58,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069343153] [2022-11-16 11:07:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:58,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069343153] [2022-11-16 11:07:58,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069343153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:58,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:58,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:07:58,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241000193] [2022-11-16 11:07:58,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:58,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:07:58,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:07:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:07:58,326 INFO L87 Difference]: Start difference. First operand 515 states and 738 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:58,516 INFO L93 Difference]: Finished difference Result 1423 states and 2044 transitions. [2022-11-16 11:07:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:07:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-16 11:07:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:58,521 INFO L225 Difference]: With dead ends: 1423 [2022-11-16 11:07:58,521 INFO L226 Difference]: Without dead ends: 937 [2022-11-16 11:07:58,522 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 [2022-11-16 11:07:58,525 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 46 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:58,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 193 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-11-16 11:07:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 935. [2022-11-16 11:07:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 1.411134903640257) internal successors, (1318), 934 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1318 transitions. [2022-11-16 11:07:58,703 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1318 transitions. Word has length 47 [2022-11-16 11:07:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:58,703 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 1318 transitions. [2022-11-16 11:07:58,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1318 transitions. [2022-11-16 11:07:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 11:07:58,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:58,705 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] [2022-11-16 11:07:58,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:07:58,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1111100995, now seen corresponding path program 1 times [2022-11-16 11:07:58,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:58,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006077092] [2022-11-16 11:07:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:58,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:58,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006077092] [2022-11-16 11:07:58,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006077092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:58,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:58,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:07:58,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792982441] [2022-11-16 11:07:58,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:07:58,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:07:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:07:58,750 INFO L87 Difference]: Start difference. First operand 935 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:58,980 INFO L93 Difference]: Finished difference Result 1902 states and 2716 transitions. [2022-11-16 11:07:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:07:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-11-16 11:07:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:58,985 INFO L225 Difference]: With dead ends: 1902 [2022-11-16 11:07:58,986 INFO L226 Difference]: Without dead ends: 1371 [2022-11-16 11:07:58,986 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 [2022-11-16 11:07:58,987 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 47 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:58,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:07:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-11-16 11:07:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-11-16 11:07:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 1.4035087719298245) internal successors, (1920), 1368 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1920 transitions. [2022-11-16 11:07:59,239 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1920 transitions. Word has length 49 [2022-11-16 11:07:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:59,239 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 1920 transitions. [2022-11-16 11:07:59,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1920 transitions. [2022-11-16 11:07:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:07:59,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:59,241 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] [2022-11-16 11:07:59,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:07:59,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash -870105748, now seen corresponding path program 1 times [2022-11-16 11:07:59,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:59,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801083760] [2022-11-16 11:07:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:59,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:07:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801083760] [2022-11-16 11:07:59,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801083760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:07:59,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:07:59,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:07:59,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659350800] [2022-11-16 11:07:59,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:59,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:07:59,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:07:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:07:59,376 INFO L87 Difference]: Start difference. First operand 1369 states and 1920 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:00,445 INFO L93 Difference]: Finished difference Result 7019 states and 9877 transitions. [2022-11-16 11:08:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:08:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 11:08:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:00,466 INFO L225 Difference]: With dead ends: 7019 [2022-11-16 11:08:00,467 INFO L226 Difference]: Without dead ends: 5681 [2022-11-16 11:08:00,469 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 [2022-11-16 11:08:00,471 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 392 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:00,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 434 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2022-11-16 11:08:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 2705. [2022-11-16 11:08:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2705 states, 2704 states have (on average 1.3994082840236686) internal successors, (3784), 2704 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2705 states to 2705 states and 3784 transitions. [2022-11-16 11:08:00,929 INFO L78 Accepts]: Start accepts. Automaton has 2705 states and 3784 transitions. Word has length 64 [2022-11-16 11:08:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:00,930 INFO L495 AbstractCegarLoop]: Abstraction has 2705 states and 3784 transitions. [2022-11-16 11:08:00,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2705 states and 3784 transitions. [2022-11-16 11:08:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:08:00,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:00,934 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] [2022-11-16 11:08:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:08:00,934 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1304641684, now seen corresponding path program 1 times [2022-11-16 11:08:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:00,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663629628] [2022-11-16 11:08:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:08:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663629628] [2022-11-16 11:08:01,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663629628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:01,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:01,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:08:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495965606] [2022-11-16 11:08:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:01,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:08:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:08:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:08:01,104 INFO L87 Difference]: Start difference. First operand 2705 states and 3784 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:02,222 INFO L93 Difference]: Finished difference Result 8355 states and 11741 transitions. [2022-11-16 11:08:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:08:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 11:08:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:02,247 INFO L225 Difference]: With dead ends: 8355 [2022-11-16 11:08:02,248 INFO L226 Difference]: Without dead ends: 7017 [2022-11-16 11:08:02,253 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 [2022-11-16 11:08:02,254 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 384 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:02,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 431 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2022-11-16 11:08:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4713. [2022-11-16 11:08:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 1.3921901528013583) internal successors, (6560), 4712 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 6560 transitions. [2022-11-16 11:08:02,934 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 6560 transitions. Word has length 64 [2022-11-16 11:08:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:02,934 INFO L495 AbstractCegarLoop]: Abstraction has 4713 states and 6560 transitions. [2022-11-16 11:08:02,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 6560 transitions. [2022-11-16 11:08:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:08:02,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:02,936 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] [2022-11-16 11:08:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:08:02,937 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1209392748, now seen corresponding path program 1 times [2022-11-16 11:08:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:02,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309286576] [2022-11-16 11:08:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:02,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:08:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309286576] [2022-11-16 11:08:03,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309286576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:03,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:03,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:08:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102992520] [2022-11-16 11:08:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:03,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:08:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:08:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:08:03,081 INFO L87 Difference]: Start difference. First operand 4713 states and 6560 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:04,223 INFO L93 Difference]: Finished difference Result 9691 states and 13605 transitions. [2022-11-16 11:08:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:08:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-16 11:08:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:04,251 INFO L225 Difference]: With dead ends: 9691 [2022-11-16 11:08:04,251 INFO L226 Difference]: Without dead ends: 8353 [2022-11-16 11:08:04,255 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 [2022-11-16 11:08:04,255 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 351 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:04,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 483 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8353 states. [2022-11-16 11:08:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8353 to 6049. [2022-11-16 11:08:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6049 states, 6048 states have (on average 1.3928571428571428) internal successors, (8424), 6048 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6049 states to 6049 states and 8424 transitions. [2022-11-16 11:08:05,329 INFO L78 Accepts]: Start accepts. Automaton has 6049 states and 8424 transitions. Word has length 64 [2022-11-16 11:08:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:05,329 INFO L495 AbstractCegarLoop]: Abstraction has 6049 states and 8424 transitions. [2022-11-16 11:08:05,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 6049 states and 8424 transitions. [2022-11-16 11:08:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:08:05,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:05,334 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] [2022-11-16 11:08:05,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:08:05,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 453625415, now seen corresponding path program 1 times [2022-11-16 11:08:05,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:05,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457682327] [2022-11-16 11:08:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:05,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:05,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:05,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457682327] [2022-11-16 11:08:05,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457682327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:05,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:05,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:08:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509270689] [2022-11-16 11:08:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:05,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:08:05,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:08:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:08:05,485 INFO L87 Difference]: Start difference. First operand 6049 states and 8424 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:06,414 INFO L93 Difference]: Finished difference Result 10275 states and 14445 transitions. [2022-11-16 11:08:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:08:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-16 11:08:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:06,439 INFO L225 Difference]: With dead ends: 10275 [2022-11-16 11:08:06,439 INFO L226 Difference]: Without dead ends: 9313 [2022-11-16 11:08:06,443 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 [2022-11-16 11:08:06,444 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 385 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:06,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 485 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:08:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9313 states. [2022-11-16 11:08:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9313 to 7009. [2022-11-16 11:08:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 7008 states have (on average 1.3961187214611872) internal successors, (9784), 7008 states have internal predecessors, (9784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 9784 transitions. [2022-11-16 11:08:07,354 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 9784 transitions. Word has length 66 [2022-11-16 11:08:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:07,355 INFO L495 AbstractCegarLoop]: Abstraction has 7009 states and 9784 transitions. [2022-11-16 11:08:07,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 9784 transitions. [2022-11-16 11:08:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:08:07,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:07,357 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:08:07,357 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2206620, now seen corresponding path program 1 times [2022-11-16 11:08:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:07,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194960108] [2022-11-16 11:08:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:07,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:07,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:07,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194960108] [2022-11-16 11:08:07,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194960108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:07,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:07,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:08:07,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758942696] [2022-11-16 11:08:07,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:07,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:08:07,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:07,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:08:07,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:08:07,496 INFO L87 Difference]: Start difference. First operand 7009 states and 9784 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:08,310 INFO L93 Difference]: Finished difference Result 12311 states and 17285 transitions. [2022-11-16 11:08:08,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:08:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-16 11:08:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:08,325 INFO L225 Difference]: With dead ends: 12311 [2022-11-16 11:08:08,342 INFO L226 Difference]: Without dead ends: 5333 [2022-11-16 11:08:08,362 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 [2022-11-16 11:08:08,363 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 42 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:08,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 195 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2022-11-16 11:08:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 5331. [2022-11-16 11:08:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 1.3962476547842402) internal successors, (7442), 5330 states have internal predecessors, (7442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 7442 transitions. [2022-11-16 11:08:09,229 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 7442 transitions. Word has length 66 [2022-11-16 11:08:09,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:09,230 INFO L495 AbstractCegarLoop]: Abstraction has 5331 states and 7442 transitions. [2022-11-16 11:08:09,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 7442 transitions. [2022-11-16 11:08:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 11:08:09,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:09,231 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] [2022-11-16 11:08:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:08:09,232 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1317089731, now seen corresponding path program 1 times [2022-11-16 11:08:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:09,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536768701] [2022-11-16 11:08:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:09,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:09,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536768701] [2022-11-16 11:08:09,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536768701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:09,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:09,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:08:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362878527] [2022-11-16 11:08:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:08:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:08:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:08:09,323 INFO L87 Difference]: Start difference. First operand 5331 states and 7442 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:09,660 INFO L93 Difference]: Finished difference Result 7975 states and 11140 transitions. [2022-11-16 11:08:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:08:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-16 11:08:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:09,666 INFO L225 Difference]: With dead ends: 7975 [2022-11-16 11:08:09,666 INFO L226 Difference]: Without dead ends: 2693 [2022-11-16 11:08:09,672 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 [2022-11-16 11:08:09,672 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 37 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:09,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 180 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-11-16 11:08:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2691. [2022-11-16 11:08:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 1.3762081784386617) internal successors, (3702), 2690 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 3702 transitions. [2022-11-16 11:08:10,010 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 3702 transitions. Word has length 67 [2022-11-16 11:08:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:10,010 INFO L495 AbstractCegarLoop]: Abstraction has 2691 states and 3702 transitions. [2022-11-16 11:08:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 3702 transitions. [2022-11-16 11:08:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:08:10,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:10,012 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] [2022-11-16 11:08:10,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:08:10,012 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 486786415, now seen corresponding path program 1 times [2022-11-16 11:08:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613331185] [2022-11-16 11:08:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:10,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613331185] [2022-11-16 11:08:10,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613331185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:10,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:10,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:08:10,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241263931] [2022-11-16 11:08:10,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:10,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:08:10,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:10,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:08:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:08:10,109 INFO L87 Difference]: Start difference. First operand 2691 states and 3702 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:10,315 INFO L93 Difference]: Finished difference Result 4015 states and 5530 transitions. [2022-11-16 11:08:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:08:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-16 11:08:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:10,319 INFO L225 Difference]: With dead ends: 4015 [2022-11-16 11:08:10,319 INFO L226 Difference]: Without dead ends: 1373 [2022-11-16 11:08:10,322 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 [2022-11-16 11:08:10,323 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:10,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 165 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-11-16 11:08:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1371. [2022-11-16 11:08:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.3532846715328468) internal successors, (1854), 1370 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1854 transitions. [2022-11-16 11:08:10,518 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1854 transitions. Word has length 69 [2022-11-16 11:08:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:10,519 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 1854 transitions. [2022-11-16 11:08:10,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1854 transitions. [2022-11-16 11:08:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:08:10,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:10,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:10,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:08:10,521 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2100202719, now seen corresponding path program 1 times [2022-11-16 11:08:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:10,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381102357] [2022-11-16 11:08:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:10,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:10,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381102357] [2022-11-16 11:08:10,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381102357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:08:10,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:08:10,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:08:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684508198] [2022-11-16 11:08:10,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:08:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:08:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:08:10,642 INFO L87 Difference]: Start difference. First operand 1371 states and 1854 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2022-11-16 11:08:10,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:10,747 INFO L93 Difference]: Finished difference Result 2035 states and 2758 transitions. [2022-11-16 11:08:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:08:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 71 [2022-11-16 11:08:10,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:10,749 INFO L225 Difference]: With dead ends: 2035 [2022-11-16 11:08:10,749 INFO L226 Difference]: Without dead ends: 713 [2022-11-16 11:08:10,751 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 [2022-11-16 11:08:10,752 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 31 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:10,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 150 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:08:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-16 11:08:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 711. [2022-11-16 11:08:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.3253521126760563) internal successors, (941), 710 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 941 transitions. [2022-11-16 11:08:10,851 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 941 transitions. Word has length 71 [2022-11-16 11:08:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:10,852 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 941 transitions. [2022-11-16 11:08:10,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2022-11-16 11:08:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 941 transitions. [2022-11-16 11:08:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 11:08:10,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:10,853 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] [2022-11-16 11:08:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:08:10,853 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:10,854 INFO L85 PathProgramCache]: Analyzing trace with hash 952563539, now seen corresponding path program 1 times [2022-11-16 11:08:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:10,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422235077] [2022-11-16 11:08:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:12,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422235077] [2022-11-16 11:08:12,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422235077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:12,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217804107] [2022-11-16 11:08:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:12,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:12,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:12,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:08:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:08:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:12,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:12,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217804107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:12,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:12,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 17 [2022-11-16 11:08:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264787559] [2022-11-16 11:08:12,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:12,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:08:12,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:08:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:08:12,957 INFO L87 Difference]: Start difference. First operand 711 states and 941 transitions. Second operand has 17 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:18,423 INFO L93 Difference]: Finished difference Result 7330 states and 9637 transitions. [2022-11-16 11:08:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 11:08:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-16 11:08:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:18,438 INFO L225 Difference]: With dead ends: 7330 [2022-11-16 11:08:18,438 INFO L226 Difference]: Without dead ends: 6668 [2022-11-16 11:08:18,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 11:08:18,443 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2333 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2333 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:18,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2333 Valid, 649 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:08:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6668 states. [2022-11-16 11:08:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6668 to 4666. [2022-11-16 11:08:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 4665 states have (on average 1.2662379421221865) internal successors, (5907), 4665 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 5907 transitions. [2022-11-16 11:08:19,223 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 5907 transitions. Word has length 73 [2022-11-16 11:08:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:19,224 INFO L495 AbstractCegarLoop]: Abstraction has 4666 states and 5907 transitions. [2022-11-16 11:08:19,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.941176470588236) internal successors, (203), 17 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 5907 transitions. [2022-11-16 11:08:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 11:08:19,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:19,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:19,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:19,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:19,431 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:19,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:19,432 INFO L85 PathProgramCache]: Analyzing trace with hash 405597481, now seen corresponding path program 1 times [2022-11-16 11:08:19,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:19,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826621740] [2022-11-16 11:08:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:19,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:21,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826621740] [2022-11-16 11:08:21,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826621740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635863578] [2022-11-16 11:08:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:21,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:21,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:21,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:21,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:08:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:08:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:22,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:23,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635863578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:23,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:23,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-11-16 11:08:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235109581] [2022-11-16 11:08:23,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:08:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:08:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:08:23,866 INFO L87 Difference]: Start difference. First operand 4666 states and 5907 transitions. Second operand has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:26,764 INFO L93 Difference]: Finished difference Result 16927 states and 21617 transitions. [2022-11-16 11:08:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:08:26,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 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 74 [2022-11-16 11:08:26,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:26,786 INFO L225 Difference]: With dead ends: 16927 [2022-11-16 11:08:26,786 INFO L226 Difference]: Without dead ends: 12921 [2022-11-16 11:08:26,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1084, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:08:26,792 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 1193 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:26,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 593 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:08:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12921 states. [2022-11-16 11:08:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12921 to 9315. [2022-11-16 11:08:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 9314 states have (on average 1.2499463173716985) internal successors, (11642), 9314 states have internal predecessors, (11642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 11642 transitions. [2022-11-16 11:08:28,345 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 11642 transitions. Word has length 74 [2022-11-16 11:08:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:28,346 INFO L495 AbstractCegarLoop]: Abstraction has 9315 states and 11642 transitions. [2022-11-16 11:08:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.884615384615385) internal successors, (179), 25 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 11642 transitions. [2022-11-16 11:08:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 11:08:28,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:28,350 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] [2022-11-16 11:08:28,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:28,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:28,555 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash -96370789, now seen corresponding path program 1 times [2022-11-16 11:08:28,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:28,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089183679] [2022-11-16 11:08:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:29,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:29,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089183679] [2022-11-16 11:08:29,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089183679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:29,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551377946] [2022-11-16 11:08:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:29,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:29,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:29,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:29,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:08:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:08:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:30,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:31,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551377946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:31,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:31,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 30 [2022-11-16 11:08:31,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869730481] [2022-11-16 11:08:31,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:31,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:08:31,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:31,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:08:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:08:31,701 INFO L87 Difference]: Start difference. First operand 9315 states and 11642 transitions. Second operand has 30 states, 30 states have (on average 6.9) internal successors, (207), 30 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:43,525 INFO L93 Difference]: Finished difference Result 43614 states and 53743 transitions. [2022-11-16 11:08:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 11:08:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.9) internal successors, (207), 30 states have internal predecessors, (207), 0 states have call successors, (0), 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 74 [2022-11-16 11:08:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:43,570 INFO L225 Difference]: With dead ends: 43614 [2022-11-16 11:08:43,570 INFO L226 Difference]: Without dead ends: 34663 [2022-11-16 11:08:43,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 11:08:43,585 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 1993 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:43,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 1120 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:08:43,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34663 states. [2022-11-16 11:08:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34663 to 23686. [2022-11-16 11:08:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23686 states, 23685 states have (on average 1.2350010555203716) internal successors, (29251), 23685 states have internal predecessors, (29251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23686 states to 23686 states and 29251 transitions. [2022-11-16 11:08:48,808 INFO L78 Accepts]: Start accepts. Automaton has 23686 states and 29251 transitions. Word has length 74 [2022-11-16 11:08:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:48,810 INFO L495 AbstractCegarLoop]: Abstraction has 23686 states and 29251 transitions. [2022-11-16 11:08:48,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.9) internal successors, (207), 30 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 23686 states and 29251 transitions. [2022-11-16 11:08:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-16 11:08:48,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:48,813 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] [2022-11-16 11:08:48,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:49,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:08:49,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:49,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1129913153, now seen corresponding path program 1 times [2022-11-16 11:08:49,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:49,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062589531] [2022-11-16 11:08:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:49,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:50,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062589531] [2022-11-16 11:08:50,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062589531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060245027] [2022-11-16 11:08:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:50,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:50,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:50,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:50,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:08:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:08:50,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:51,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:51,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060245027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:51,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:51,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2022-11-16 11:08:51,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854612989] [2022-11-16 11:08:51,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:51,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:08:51,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:08:51,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:08:51,888 INFO L87 Difference]: Start difference. First operand 23686 states and 29251 transitions. Second operand has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 26 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:25,413 INFO L93 Difference]: Finished difference Result 79072 states and 95363 transitions. [2022-11-16 11:09:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-16 11:09:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 26 states have internal predecessors, (204), 0 states have call successors, (0), 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 75 [2022-11-16 11:09:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:25,497 INFO L225 Difference]: With dead ends: 79072 [2022-11-16 11:09:25,497 INFO L226 Difference]: Without dead ends: 57433 [2022-11-16 11:09:25,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1893, Invalid=8007, Unknown=0, NotChecked=0, Total=9900 [2022-11-16 11:09:25,519 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 2364 mSDsluCounter, 2893 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 3114 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:25,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2364 Valid, 3114 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 11:09:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57433 states. [2022-11-16 11:09:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57433 to 21031. [2022-11-16 11:09:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21031 states, 21030 states have (on average 1.2158820732287208) internal successors, (25570), 21030 states have internal predecessors, (25570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21031 states to 21031 states and 25570 transitions. [2022-11-16 11:09:34,123 INFO L78 Accepts]: Start accepts. Automaton has 21031 states and 25570 transitions. Word has length 75 [2022-11-16 11:09:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:34,124 INFO L495 AbstractCegarLoop]: Abstraction has 21031 states and 25570 transitions. [2022-11-16 11:09:34,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.555555555555555) internal successors, (204), 26 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21031 states and 25570 transitions. [2022-11-16 11:09:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 11:09:34,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:34,126 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] [2022-11-16 11:09:34,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:34,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-16 11:09:34,332 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2138224985, now seen corresponding path program 1 times [2022-11-16 11:09:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391066030] [2022-11-16 11:09:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391066030] [2022-11-16 11:09:35,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391066030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627124457] [2022-11-16 11:09:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:35,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:35,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:35,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:09:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:35,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:09:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:40,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:48,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627124457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:48,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:48,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20, 21] total 50 [2022-11-16 11:09:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420604066] [2022-11-16 11:09:48,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:09:48,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:48,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:09:48,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:09:48,379 INFO L87 Difference]: Start difference. First operand 21031 states and 25570 transitions. Second operand has 50 states, 50 states have (on average 4.16) internal successors, (208), 50 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:03,888 INFO L93 Difference]: Finished difference Result 94485 states and 112866 transitions. [2022-11-16 11:12:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-11-16 11:12:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.16) internal successors, (208), 50 states have internal predecessors, (208), 0 states have call successors, (0), 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 76 [2022-11-16 11:12:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:04,012 INFO L225 Difference]: With dead ends: 94485 [2022-11-16 11:12:04,012 INFO L226 Difference]: Without dead ends: 81907 [2022-11-16 11:12:04,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27991 ImplicationChecksByTransitivity, 90.4s TimeCoverageRelationStatistics Valid=13570, Invalid=49180, Unknown=0, NotChecked=0, Total=62750 [2022-11-16 11:12:04,044 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 4097 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 3949 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 4304 SdHoareTripleChecker+Invalid, 4170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 3949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:04,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4097 Valid, 4304 Invalid, 4170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 3949 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 11:12:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81907 states. [2022-11-16 11:12:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81907 to 25649. [2022-11-16 11:12:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25649 states, 25648 states have (on average 1.2180286961946352) internal successors, (31240), 25648 states have internal predecessors, (31240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25649 states to 25649 states and 31240 transitions. [2022-11-16 11:12:16,209 INFO L78 Accepts]: Start accepts. Automaton has 25649 states and 31240 transitions. Word has length 76 [2022-11-16 11:12:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:16,209 INFO L495 AbstractCegarLoop]: Abstraction has 25649 states and 31240 transitions. [2022-11-16 11:12:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.16) internal successors, (208), 50 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:12:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25649 states and 31240 transitions. [2022-11-16 11:12:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:12:16,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:16,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:16,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:16,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:16,415 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:16,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1719902045, now seen corresponding path program 1 times [2022-11-16 11:12:16,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:16,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252972690] [2022-11-16 11:12:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:16,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:17,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252972690] [2022-11-16 11:12:17,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252972690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:17,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15280712] [2022-11-16 11:12:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:17,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:17,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:17,766 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:17,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:12:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:12:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:22,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:28,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15280712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:28,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:28,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 24] total 59 [2022-11-16 11:12:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726179437] [2022-11-16 11:12:28,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:28,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 11:12:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 11:12:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 11:12:28,665 INFO L87 Difference]: Start difference. First operand 25649 states and 31240 transitions. Second operand has 59 states, 59 states have (on average 3.593220338983051) internal successors, (212), 59 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:26,827 INFO L93 Difference]: Finished difference Result 106758 states and 129174 transitions. [2022-11-16 11:17:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 560 states. [2022-11-16 11:17:26,827 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.593220338983051) internal successors, (212), 59 states have internal predecessors, (212), 0 states have call successors, (0), 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 [2022-11-16 11:17:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:26,958 INFO L225 Difference]: With dead ends: 106758 [2022-11-16 11:17:26,959 INFO L226 Difference]: Without dead ends: 95576 [2022-11-16 11:17:27,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172706 ImplicationChecksByTransitivity, 234.4s TimeCoverageRelationStatistics Valid=51726, Invalid=328346, Unknown=0, NotChecked=0, Total=380072 [2022-11-16 11:17:27,005 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 7214 mSDsluCounter, 4786 mSDsCounter, 0 mSdLazyCounter, 7422 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7214 SdHoareTripleChecker+Valid, 4994 SdHoareTripleChecker+Invalid, 7838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 7422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:27,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7214 Valid, 4994 Invalid, 7838 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [416 Valid, 7422 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-11-16 11:17:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95576 states. [2022-11-16 11:17:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95576 to 36220. [2022-11-16 11:17:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36220 states, 36219 states have (on average 1.2294099781882437) internal successors, (44528), 36219 states have internal predecessors, (44528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36220 states to 36220 states and 44528 transitions. [2022-11-16 11:17:46,243 INFO L78 Accepts]: Start accepts. Automaton has 36220 states and 44528 transitions. Word has length 77 [2022-11-16 11:17:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:46,243 INFO L495 AbstractCegarLoop]: Abstraction has 36220 states and 44528 transitions. [2022-11-16 11:17:46,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.593220338983051) internal successors, (212), 59 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36220 states and 44528 transitions. [2022-11-16 11:17:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-16 11:17:46,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:46,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:46,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:46,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:46,459 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:17:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash 482840398, now seen corresponding path program 1 times [2022-11-16 11:17:46,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:46,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416930225] [2022-11-16 11:17:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:47,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:47,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416930225] [2022-11-16 11:17:47,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416930225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:17:47,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358627955] [2022-11-16 11:17:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:47,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:47,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:17:47,675 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:17:47,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:17:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:17:47,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 35 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:00,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:18:04,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358627955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:04,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:18:04,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-11-16 11:18:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668629328] [2022-11-16 11:18:04,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:04,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:18:04,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:18:04,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=802, Unknown=4, NotChecked=0, Total=930 [2022-11-16 11:18:04,721 INFO L87 Difference]: Start difference. First operand 36220 states and 44528 transitions. Second operand has 31 states, 31 states have (on average 9.516129032258064) internal successors, (295), 30 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:47,983 INFO L93 Difference]: Finished difference Result 114143 states and 140783 transitions. [2022-11-16 11:20:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 11:20:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 9.516129032258064) internal successors, (295), 30 states have internal predecessors, (295), 0 states have call successors, (0), 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 122 [2022-11-16 11:20:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:48,140 INFO L225 Difference]: With dead ends: 114143 [2022-11-16 11:20:48,140 INFO L226 Difference]: Without dead ends: 106213 [2022-11-16 11:20:48,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 95.4s TimeCoverageRelationStatistics Valid=1294, Invalid=5005, Unknown=21, NotChecked=0, Total=6320 [2022-11-16 11:20:48,165 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 2076 mSDsluCounter, 2452 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:48,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2076 Valid, 2614 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1172 Invalid, 0 Unknown, 611 Unchecked, 2.5s Time] [2022-11-16 11:20:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106213 states. [2022-11-16 11:21:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106213 to 69598. [2022-11-16 11:21:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69598 states, 69597 states have (on average 1.2306708622498097) internal successors, (85651), 69597 states have internal predecessors, (85651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69598 states to 69598 states and 85651 transitions. [2022-11-16 11:21:34,358 INFO L78 Accepts]: Start accepts. Automaton has 69598 states and 85651 transitions. Word has length 122 [2022-11-16 11:21:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:34,358 INFO L495 AbstractCegarLoop]: Abstraction has 69598 states and 85651 transitions. [2022-11-16 11:21:34,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.516129032258064) internal successors, (295), 30 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 69598 states and 85651 transitions. [2022-11-16 11:21:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-16 11:21:34,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:34,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:34,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:21:34,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:21:34,573 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:34,574 INFO L85 PathProgramCache]: Analyzing trace with hash 3669070, now seen corresponding path program 1 times [2022-11-16 11:21:34,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:34,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469983989] [2022-11-16 11:21:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:34,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:35,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469983989] [2022-11-16 11:21:35,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469983989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:21:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637653322] [2022-11-16 11:21:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:35,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:35,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:35,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502c7c34-7275-4417-b51a-a74d634de474/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:21:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:21:36,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 26 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:44,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:48,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637653322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:48,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:21:48,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-11-16 11:21:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507059329] [2022-11-16 11:21:48,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:48,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:21:48,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:21:48,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=809, Unknown=2, NotChecked=0, Total=930 [2022-11-16 11:21:48,076 INFO L87 Difference]: Start difference. First operand 69598 states and 85651 transitions. Second operand has 31 states, 31 states have (on average 9.709677419354838) internal successors, (301), 30 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)