./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX --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 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:44:08,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:44:08,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:44:08,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:44:08,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:44:08,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:44:08,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:44:08,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:44:08,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:44:08,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:44:08,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:44:08,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:44:08,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:44:08,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:44:08,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:44:08,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:44:08,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:44:08,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:44:08,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:44:08,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:44:08,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:44:08,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:44:08,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:44:08,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:44:08,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:44:08,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:44:08,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:44:08,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:44:08,319 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:44:08,320 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:44:08,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:44:08,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:44:08,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:44:08,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:44:08,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:44:08,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:44:08,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:44:08,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:44:08,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:44:08,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:44:08,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:44:08,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:44:08,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:44:08,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:44:08,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:44:08,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:44:08,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:44:08,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:44:08,381 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:44:08,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:44:08,382 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:44:08,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:44:08,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:44:08,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:44:08,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:44:08,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:44:08,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:44:08,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:44:08,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:44:08,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:44:08,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:44:08,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:44:08,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:44:08,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:44:08,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:08,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:44:08,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:44:08,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:44:08,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:44:08,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:44:08,388 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:44:08,389 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:44:08,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:44:08,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:44:08,390 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_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-11-09 10:44:08,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:44:08,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:44:08,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:44:08,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:44:08,706 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:44:08,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-09 10:44:08,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/data/8dc9cbee0/5bf4afa7757844499b44b360cba0c0fd/FLAGb9a44b460 [2021-11-09 10:44:09,446 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:44:09,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-11-09 10:44:09,469 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/data/8dc9cbee0/5bf4afa7757844499b44b360cba0c0fd/FLAGb9a44b460 [2021-11-09 10:44:09,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/data/8dc9cbee0/5bf4afa7757844499b44b360cba0c0fd [2021-11-09 10:44:09,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:44:09,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:44:09,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:09,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:44:09,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:44:09,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:09" (1/1) ... [2021-11-09 10:44:09,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@800baf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:09, skipping insertion in model container [2021-11-09 10:44:09,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:09" (1/1) ... [2021-11-09 10:44:09,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:44:09,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:44:10,285 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-09 10:44:10,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:10,321 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:44:10,488 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c[72918,72931] [2021-11-09 10:44:10,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:10,509 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:44:10,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10 WrapperNode [2021-11-09 10:44:10,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:10,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:10,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:44:10,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:44:10,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:10,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:44:10,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:44:10,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:44:10,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:44:10,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:44:10,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:44:10,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:44:10,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (1/1) ... [2021-11-09 10:44:10,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:10,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:44:10,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:44:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:44:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:44:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:44:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:44:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:44:10,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:44:10,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:44:10,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:44:10,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:44:11,008 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 10:44:14,152 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-09 10:44:14,152 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-09 10:44:14,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:44:14,170 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 10:44:14,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:14 BoogieIcfgContainer [2021-11-09 10:44:14,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:44:14,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:44:14,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:44:14,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:44:14,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:09" (1/3) ... [2021-11-09 10:44:14,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ae4056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:14, skipping insertion in model container [2021-11-09 10:44:14,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:10" (2/3) ... [2021-11-09 10:44:14,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ae4056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:14, skipping insertion in model container [2021-11-09 10:44:14,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:14" (3/3) ... [2021-11-09 10:44:14,186 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.01.i.cil-1.c [2021-11-09 10:44:14,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:44:14,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:44:14,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:44:14,268 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:44:14,269 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:44:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 10:44:14,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:14,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:14,333 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1383952291, now seen corresponding path program 1 times [2021-11-09 10:44:14,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:14,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524477380] [2021-11-09 10:44:14,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:14,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:14,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:14,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524477380] [2021-11-09 10:44:14,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524477380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:14,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:14,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:14,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480756174] [2021-11-09 10:44:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:14,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:14,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:14,864 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 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 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:17,364 INFO L93 Difference]: Finished difference Result 319 states and 533 transitions. [2021-11-09 10:44:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-11-09 10:44:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:17,377 INFO L225 Difference]: With dead ends: 319 [2021-11-09 10:44:17,377 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:44:17,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:44:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-11-09 10:44:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-11-09 10:44:17,424 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 48 [2021-11-09 10:44:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:17,425 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-11-09 10:44:17,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-11-09 10:44:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:44:17,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:17,428 INFO L513 BasicCegarLoop]: 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] [2021-11-09 10:44:17,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:44:17,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:17,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:17,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1669844783, now seen corresponding path program 1 times [2021-11-09 10:44:17,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:17,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386531368] [2021-11-09 10:44:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:17,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:17,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:17,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386531368] [2021-11-09 10:44:17,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386531368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:17,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:17,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:17,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309350605] [2021-11-09 10:44:17,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:17,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:17,609 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:20,079 INFO L93 Difference]: Finished difference Result 286 states and 432 transitions. [2021-11-09 10:44:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:44:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:20,085 INFO L225 Difference]: With dead ends: 286 [2021-11-09 10:44:20,085 INFO L226 Difference]: Without dead ends: 162 [2021-11-09 10:44:20,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-09 10:44:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-11-09 10:44:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5347222222222223) internal successors, (221), 144 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 221 transitions. [2021-11-09 10:44:20,098 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 221 transitions. Word has length 61 [2021-11-09 10:44:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:20,107 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 221 transitions. [2021-11-09 10:44:20,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 221 transitions. [2021-11-09 10:44:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:44:20,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:20,110 INFO L513 BasicCegarLoop]: 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] [2021-11-09 10:44:20,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:44:20,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash 911843153, now seen corresponding path program 1 times [2021-11-09 10:44:20,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:20,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196241750] [2021-11-09 10:44:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:20,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:20,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:20,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196241750] [2021-11-09 10:44:20,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196241750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:20,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:20,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:20,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427771712] [2021-11-09 10:44:20,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:20,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:20,293 INFO L87 Difference]: Start difference. First operand 145 states and 221 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:22,714 INFO L93 Difference]: Finished difference Result 285 states and 430 transitions. [2021-11-09 10:44:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-09 10:44:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:22,716 INFO L225 Difference]: With dead ends: 285 [2021-11-09 10:44:22,716 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 10:44:22,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:22,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 10:44:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2021-11-09 10:44:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5277777777777777) internal successors, (220), 144 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 220 transitions. [2021-11-09 10:44:22,727 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 220 transitions. Word has length 62 [2021-11-09 10:44:22,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:22,727 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 220 transitions. [2021-11-09 10:44:22,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:22,727 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 220 transitions. [2021-11-09 10:44:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:44:22,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:22,730 INFO L513 BasicCegarLoop]: 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] [2021-11-09 10:44:22,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:44:22,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1350629653, now seen corresponding path program 1 times [2021-11-09 10:44:22,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:22,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640120515] [2021-11-09 10:44:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:22,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:22,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:22,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640120515] [2021-11-09 10:44:22,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640120515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:22,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:22,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:22,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406488005] [2021-11-09 10:44:22,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:22,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:22,853 INFO L87 Difference]: Start difference. First operand 145 states and 220 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:25,230 INFO L93 Difference]: Finished difference Result 283 states and 427 transitions. [2021-11-09 10:44:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-09 10:44:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:25,233 INFO L225 Difference]: With dead ends: 283 [2021-11-09 10:44:25,233 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 10:44:25,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 10:44:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2021-11-09 10:44:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5208333333333333) internal successors, (219), 144 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 219 transitions. [2021-11-09 10:44:25,245 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 219 transitions. Word has length 62 [2021-11-09 10:44:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:25,246 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 219 transitions. [2021-11-09 10:44:25,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 219 transitions. [2021-11-09 10:44:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:44:25,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:25,248 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:44:25,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:44:25,249 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1409691870, now seen corresponding path program 1 times [2021-11-09 10:44:25,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:25,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478170939] [2021-11-09 10:44:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:25,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:25,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:25,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478170939] [2021-11-09 10:44:25,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478170939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:25,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:25,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:25,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575626441] [2021-11-09 10:44:25,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:25,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:25,341 INFO L87 Difference]: Start difference. First operand 145 states and 219 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:27,667 INFO L93 Difference]: Finished difference Result 282 states and 425 transitions. [2021-11-09 10:44:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 10:44:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:27,669 INFO L225 Difference]: With dead ends: 282 [2021-11-09 10:44:27,669 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 10:44:27,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 10:44:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2021-11-09 10:44:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 144 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 218 transitions. [2021-11-09 10:44:27,678 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 218 transitions. Word has length 63 [2021-11-09 10:44:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:27,678 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 218 transitions. [2021-11-09 10:44:27,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 218 transitions. [2021-11-09 10:44:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:44:27,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:27,680 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:44:27,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:44:27,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 759775670, now seen corresponding path program 1 times [2021-11-09 10:44:27,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:27,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80726748] [2021-11-09 10:44:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:27,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:27,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:27,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80726748] [2021-11-09 10:44:27,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80726748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:27,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:27,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:27,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272458689] [2021-11-09 10:44:27,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:27,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:27,771 INFO L87 Difference]: Start difference. First operand 145 states and 218 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:30,112 INFO L93 Difference]: Finished difference Result 282 states and 424 transitions. [2021-11-09 10:44:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 10:44:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:30,114 INFO L225 Difference]: With dead ends: 282 [2021-11-09 10:44:30,115 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 10:44:30,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 10:44:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2021-11-09 10:44:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5069444444444444) internal successors, (217), 144 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 217 transitions. [2021-11-09 10:44:30,123 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 217 transitions. Word has length 63 [2021-11-09 10:44:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:30,123 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 217 transitions. [2021-11-09 10:44:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 217 transitions. [2021-11-09 10:44:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:44:30,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:30,125 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:44:30,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:44:30,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash -538386502, now seen corresponding path program 1 times [2021-11-09 10:44:30,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:30,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122579499] [2021-11-09 10:44:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:30,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:30,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:30,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122579499] [2021-11-09 10:44:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122579499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:30,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:30,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001729466] [2021-11-09 10:44:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:30,204 INFO L87 Difference]: Start difference. First operand 145 states and 217 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:32,556 INFO L93 Difference]: Finished difference Result 282 states and 423 transitions. [2021-11-09 10:44:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-09 10:44:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:32,558 INFO L225 Difference]: With dead ends: 282 [2021-11-09 10:44:32,558 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 10:44:32,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 10:44:32,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2021-11-09 10:44:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5) internal successors, (216), 144 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 216 transitions. [2021-11-09 10:44:32,565 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 216 transitions. Word has length 64 [2021-11-09 10:44:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:32,565 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 216 transitions. [2021-11-09 10:44:32,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 216 transitions. [2021-11-09 10:44:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:44:32,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:32,568 INFO L513 BasicCegarLoop]: 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] [2021-11-09 10:44:32,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:44:32,568 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash -34985065, now seen corresponding path program 1 times [2021-11-09 10:44:32,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:32,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418029518] [2021-11-09 10:44:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:32,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:32,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:32,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418029518] [2021-11-09 10:44:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418029518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:32,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:32,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:32,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541399950] [2021-11-09 10:44:32,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:32,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:32,651 INFO L87 Difference]: Start difference. First operand 145 states and 216 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2021-11-09 10:44:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:35,037 INFO L93 Difference]: Finished difference Result 312 states and 471 transitions. [2021-11-09 10:44:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 10:44:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:35,039 INFO L225 Difference]: With dead ends: 312 [2021-11-09 10:44:35,039 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 10:44:35,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 10:44:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2021-11-09 10:44:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5301204819277108) internal successors, (254), 166 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 254 transitions. [2021-11-09 10:44:35,047 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 254 transitions. Word has length 65 [2021-11-09 10:44:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:35,047 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 254 transitions. [2021-11-09 10:44:35,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2021-11-09 10:44:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 254 transitions. [2021-11-09 10:44:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:44:35,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:35,049 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:44:35,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:44:35,049 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash -755722501, now seen corresponding path program 1 times [2021-11-09 10:44:35,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:35,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129868321] [2021-11-09 10:44:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:35,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:35,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:35,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129868321] [2021-11-09 10:44:35,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129868321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:35,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:35,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:35,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472333528] [2021-11-09 10:44:35,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:35,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:35,130 INFO L87 Difference]: Start difference. First operand 167 states and 254 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2021-11-09 10:44:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:37,490 INFO L93 Difference]: Finished difference Result 326 states and 498 transitions. [2021-11-09 10:44:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-09 10:44:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:37,492 INFO L225 Difference]: With dead ends: 326 [2021-11-09 10:44:37,492 INFO L226 Difference]: Without dead ends: 180 [2021-11-09 10:44:37,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-09 10:44:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-11-09 10:44:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5240963855421688) internal successors, (253), 166 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 253 transitions. [2021-11-09 10:44:37,503 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 253 transitions. Word has length 65 [2021-11-09 10:44:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:37,503 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 253 transitions. [2021-11-09 10:44:37,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2021-11-09 10:44:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 253 transitions. [2021-11-09 10:44:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:44:37,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:37,505 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 10:44:37,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:44:37,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:37,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1827185505, now seen corresponding path program 1 times [2021-11-09 10:44:37,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:37,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480414213] [2021-11-09 10:44:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:37,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:37,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:37,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480414213] [2021-11-09 10:44:37,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480414213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:37,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:37,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:37,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465986597] [2021-11-09 10:44:37,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:37,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:37,620 INFO L87 Difference]: Start difference. First operand 167 states and 253 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 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) [2021-11-09 10:44:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:39,930 INFO L93 Difference]: Finished difference Result 316 states and 484 transitions. [2021-11-09 10:44:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 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 [2021-11-09 10:44:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:39,933 INFO L225 Difference]: With dead ends: 316 [2021-11-09 10:44:39,933 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 10:44:39,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 10:44:39,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2021-11-09 10:44:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5180722891566265) internal successors, (252), 166 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 252 transitions. [2021-11-09 10:44:39,940 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 252 transitions. Word has length 66 [2021-11-09 10:44:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:39,941 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 252 transitions. [2021-11-09 10:44:39,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 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) [2021-11-09 10:44:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 252 transitions. [2021-11-09 10:44:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:44:39,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:39,942 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:39,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:44:39,943 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 708280669, now seen corresponding path program 1 times [2021-11-09 10:44:39,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:39,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479430263] [2021-11-09 10:44:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:39,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:40,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:40,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479430263] [2021-11-09 10:44:40,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479430263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:40,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:40,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:40,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367130605] [2021-11-09 10:44:40,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:40,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:40,072 INFO L87 Difference]: Start difference. First operand 167 states and 252 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:42,367 INFO L93 Difference]: Finished difference Result 334 states and 506 transitions. [2021-11-09 10:44:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-09 10:44:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:42,370 INFO L225 Difference]: With dead ends: 334 [2021-11-09 10:44:42,370 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 10:44:42,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 10:44:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2021-11-09 10:44:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5120481927710843) internal successors, (251), 166 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 251 transitions. [2021-11-09 10:44:42,377 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 251 transitions. Word has length 78 [2021-11-09 10:44:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 251 transitions. [2021-11-09 10:44:42,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 251 transitions. [2021-11-09 10:44:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 10:44:42,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:42,379 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:42,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:44:42,380 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1619288133, now seen corresponding path program 1 times [2021-11-09 10:44:42,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:42,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828031307] [2021-11-09 10:44:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:42,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:42,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:42,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828031307] [2021-11-09 10:44:42,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828031307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:42,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:42,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:42,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313155995] [2021-11-09 10:44:42,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:42,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:42,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:42,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:42,444 INFO L87 Difference]: Start difference. First operand 167 states and 251 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:44,763 INFO L93 Difference]: Finished difference Result 333 states and 503 transitions. [2021-11-09 10:44:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 10:44:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:44,765 INFO L225 Difference]: With dead ends: 333 [2021-11-09 10:44:44,765 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 10:44:44,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 10:44:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2021-11-09 10:44:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5060240963855422) internal successors, (250), 166 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 250 transitions. [2021-11-09 10:44:44,785 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 250 transitions. Word has length 79 [2021-11-09 10:44:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:44,786 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 250 transitions. [2021-11-09 10:44:44,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 250 transitions. [2021-11-09 10:44:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 10:44:44,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:44,787 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:44,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:44:44,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2058074633, now seen corresponding path program 1 times [2021-11-09 10:44:44,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:44,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220955671] [2021-11-09 10:44:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:44,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:44,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:44,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220955671] [2021-11-09 10:44:44,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220955671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:44,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:44,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:44,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563837466] [2021-11-09 10:44:44,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:44,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:44,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:44,858 INFO L87 Difference]: Start difference. First operand 167 states and 250 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:47,205 INFO L93 Difference]: Finished difference Result 331 states and 499 transitions. [2021-11-09 10:44:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-09 10:44:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:47,207 INFO L225 Difference]: With dead ends: 331 [2021-11-09 10:44:47,208 INFO L226 Difference]: Without dead ends: 185 [2021-11-09 10:44:47,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-09 10:44:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2021-11-09 10:44:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5) internal successors, (249), 166 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 249 transitions. [2021-11-09 10:44:47,215 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 249 transitions. Word has length 79 [2021-11-09 10:44:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:47,216 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 249 transitions. [2021-11-09 10:44:47,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 249 transitions. [2021-11-09 10:44:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:44:47,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:47,217 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:47,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:44:47,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:47,218 INFO L85 PathProgramCache]: Analyzing trace with hash -953733970, now seen corresponding path program 1 times [2021-11-09 10:44:47,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:47,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852930810] [2021-11-09 10:44:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:47,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:47,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:47,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852930810] [2021-11-09 10:44:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852930810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:47,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596078611] [2021-11-09 10:44:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:47,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:47,282 INFO L87 Difference]: Start difference. First operand 167 states and 249 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:48,275 INFO L93 Difference]: Finished difference Result 330 states and 496 transitions. [2021-11-09 10:44:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:44:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:48,277 INFO L225 Difference]: With dead ends: 330 [2021-11-09 10:44:48,278 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 10:44:48,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 10:44:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2021-11-09 10:44:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4939759036144578) internal successors, (248), 166 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 248 transitions. [2021-11-09 10:44:48,284 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 248 transitions. Word has length 80 [2021-11-09 10:44:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:48,284 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 248 transitions. [2021-11-09 10:44:48,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:48,284 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 248 transitions. [2021-11-09 10:44:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 10:44:48,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:48,286 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:44:48,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:44:48,286 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1215733570, now seen corresponding path program 1 times [2021-11-09 10:44:48,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:48,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005887032] [2021-11-09 10:44:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:48,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:48,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:48,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005887032] [2021-11-09 10:44:48,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005887032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:48,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:48,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:48,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177042425] [2021-11-09 10:44:48,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:48,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:48,367 INFO L87 Difference]: Start difference. First operand 167 states and 248 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:50,709 INFO L93 Difference]: Finished difference Result 330 states and 494 transitions. [2021-11-09 10:44:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:50,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-09 10:44:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:50,711 INFO L225 Difference]: With dead ends: 330 [2021-11-09 10:44:50,711 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 10:44:50,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 10:44:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2021-11-09 10:44:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4879518072289157) internal successors, (247), 166 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 247 transitions. [2021-11-09 10:44:50,717 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 247 transitions. Word has length 80 [2021-11-09 10:44:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:50,717 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 247 transitions. [2021-11-09 10:44:50,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 247 transitions. [2021-11-09 10:44:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 10:44:50,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:50,723 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-09 10:44:50,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:44:50,723 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 711406510, now seen corresponding path program 1 times [2021-11-09 10:44:50,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:50,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925431262] [2021-11-09 10:44:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:50,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:50,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:50,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925431262] [2021-11-09 10:44:50,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925431262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:50,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:50,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:50,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340628640] [2021-11-09 10:44:50,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:50,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:50,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:50,805 INFO L87 Difference]: Start difference. First operand 167 states and 247 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:53,122 INFO L93 Difference]: Finished difference Result 330 states and 492 transitions. [2021-11-09 10:44:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:53,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-09 10:44:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:53,124 INFO L225 Difference]: With dead ends: 330 [2021-11-09 10:44:53,125 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 10:44:53,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 10:44:53,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2021-11-09 10:44:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 166 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 246 transitions. [2021-11-09 10:44:53,131 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 246 transitions. Word has length 81 [2021-11-09 10:44:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:53,132 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 246 transitions. [2021-11-09 10:44:53,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 246 transitions. [2021-11-09 10:44:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:44:53,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:53,133 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-09 10:44:53,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:44:53,134 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash -666844793, now seen corresponding path program 1 times [2021-11-09 10:44:53,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:53,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221588571] [2021-11-09 10:44:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:53,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:53,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:53,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221588571] [2021-11-09 10:44:53,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221588571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:53,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:53,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:53,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231633463] [2021-11-09 10:44:53,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:53,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:53,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:53,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:53,197 INFO L87 Difference]: Start difference. First operand 167 states and 246 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:55,465 INFO L93 Difference]: Finished difference Result 330 states and 490 transitions. [2021-11-09 10:44:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-09 10:44:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:55,467 INFO L225 Difference]: With dead ends: 330 [2021-11-09 10:44:55,467 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 10:44:55,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 10:44:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 167. [2021-11-09 10:44:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4759036144578312) internal successors, (245), 166 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 245 transitions. [2021-11-09 10:44:55,474 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 245 transitions. Word has length 82 [2021-11-09 10:44:55,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:55,474 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 245 transitions. [2021-11-09 10:44:55,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 245 transitions. [2021-11-09 10:44:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 10:44:55,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:55,476 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:55,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 10:44:55,476 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash 928023443, now seen corresponding path program 1 times [2021-11-09 10:44:55,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:55,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924622387] [2021-11-09 10:44:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:55,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:44:55,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:55,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924622387] [2021-11-09 10:44:55,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924622387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:55,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:55,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:55,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351756656] [2021-11-09 10:44:55,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:55,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:55,554 INFO L87 Difference]: Start difference. First operand 167 states and 245 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:56,948 INFO L93 Difference]: Finished difference Result 320 states and 475 transitions. [2021-11-09 10:44:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-09 10:44:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:56,950 INFO L225 Difference]: With dead ends: 320 [2021-11-09 10:44:56,950 INFO L226 Difference]: Without dead ends: 174 [2021-11-09 10:44:56,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-09 10:44:56,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2021-11-09 10:44:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4698795180722892) internal successors, (244), 166 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 244 transitions. [2021-11-09 10:44:56,963 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 244 transitions. Word has length 83 [2021-11-09 10:44:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:56,963 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 244 transitions. [2021-11-09 10:44:56,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 244 transitions. [2021-11-09 10:44:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 10:44:56,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:56,967 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:56,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:44:56,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1904924532, now seen corresponding path program 1 times [2021-11-09 10:44:56,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:56,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263115436] [2021-11-09 10:44:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:56,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:44:57,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:57,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263115436] [2021-11-09 10:44:57,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263115436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:57,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:57,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:57,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138558651] [2021-11-09 10:44:57,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:57,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:57,050 INFO L87 Difference]: Start difference. First operand 167 states and 244 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:44:59,340 INFO L93 Difference]: Finished difference Result 363 states and 539 transitions. [2021-11-09 10:44:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:44:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-09 10:44:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:44:59,342 INFO L225 Difference]: With dead ends: 363 [2021-11-09 10:44:59,342 INFO L226 Difference]: Without dead ends: 217 [2021-11-09 10:44:59,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:44:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-09 10:44:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-11-09 10:44:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.5026178010471205) internal successors, (287), 191 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 287 transitions. [2021-11-09 10:44:59,350 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 287 transitions. Word has length 87 [2021-11-09 10:44:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:44:59,363 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 287 transitions. [2021-11-09 10:44:59,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:44:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 287 transitions. [2021-11-09 10:44:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 10:44:59,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:44:59,364 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:44:59,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 10:44:59,365 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:44:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:44:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -340654922, now seen corresponding path program 1 times [2021-11-09 10:44:59,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:44:59,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619994314] [2021-11-09 10:44:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:44:59,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:44:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:44:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:44:59,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:44:59,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619994314] [2021-11-09 10:44:59,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619994314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:44:59,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:44:59,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:44:59,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885447987] [2021-11-09 10:44:59,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:44:59,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:44:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:44:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:44:59,453 INFO L87 Difference]: Start difference. First operand 192 states and 287 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:01,888 INFO L93 Difference]: Finished difference Result 459 states and 698 transitions. [2021-11-09 10:45:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-09 10:45:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:01,891 INFO L225 Difference]: With dead ends: 459 [2021-11-09 10:45:01,891 INFO L226 Difference]: Without dead ends: 288 [2021-11-09 10:45:01,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-09 10:45:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 234. [2021-11-09 10:45:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5622317596566524) internal successors, (364), 233 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 364 transitions. [2021-11-09 10:45:01,900 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 364 transitions. Word has length 87 [2021-11-09 10:45:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:01,900 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 364 transitions. [2021-11-09 10:45:01,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 364 transitions. [2021-11-09 10:45:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 10:45:01,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:01,902 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:01,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 10:45:01,902 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1128545120, now seen corresponding path program 1 times [2021-11-09 10:45:01,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:01,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753818618] [2021-11-09 10:45:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:01,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:02,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:02,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753818618] [2021-11-09 10:45:02,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753818618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:02,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:02,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:02,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746136569] [2021-11-09 10:45:02,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:02,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:02,017 INFO L87 Difference]: Start difference. First operand 234 states and 364 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:04,321 INFO L93 Difference]: Finished difference Result 472 states and 735 transitions. [2021-11-09 10:45:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 100 [2021-11-09 10:45:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:04,323 INFO L225 Difference]: With dead ends: 472 [2021-11-09 10:45:04,324 INFO L226 Difference]: Without dead ends: 259 [2021-11-09 10:45:04,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-09 10:45:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 234. [2021-11-09 10:45:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.55793991416309) internal successors, (363), 233 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 363 transitions. [2021-11-09 10:45:04,332 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 363 transitions. Word has length 100 [2021-11-09 10:45:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:04,332 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 363 transitions. [2021-11-09 10:45:04,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 363 transitions. [2021-11-09 10:45:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-09 10:45:04,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:04,334 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:04,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 10:45:04,335 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1905504926, now seen corresponding path program 1 times [2021-11-09 10:45:04,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:04,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130344759] [2021-11-09 10:45:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:04,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:04,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:04,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130344759] [2021-11-09 10:45:04,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130344759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:04,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:04,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:04,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300309777] [2021-11-09 10:45:04,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:04,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:04,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:04,405 INFO L87 Difference]: Start difference. First operand 234 states and 363 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:06,823 INFO L93 Difference]: Finished difference Result 501 states and 772 transitions. [2021-11-09 10:45:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 100 [2021-11-09 10:45:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:06,828 INFO L225 Difference]: With dead ends: 501 [2021-11-09 10:45:06,828 INFO L226 Difference]: Without dead ends: 288 [2021-11-09 10:45:06,829 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-09 10:45:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 234. [2021-11-09 10:45:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.553648068669528) internal successors, (362), 233 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 362 transitions. [2021-11-09 10:45:06,837 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 362 transitions. Word has length 100 [2021-11-09 10:45:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:06,838 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 362 transitions. [2021-11-09 10:45:06,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 362 transitions. [2021-11-09 10:45:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 10:45:06,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:06,839 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 10:45:06,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 10:45:06,840 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash 512263522, now seen corresponding path program 1 times [2021-11-09 10:45:06,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:06,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58756725] [2021-11-09 10:45:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:06,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:06,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:06,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58756725] [2021-11-09 10:45:06,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58756725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:06,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:06,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:06,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552832417] [2021-11-09 10:45:06,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:06,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:06,926 INFO L87 Difference]: Start difference. First operand 234 states and 362 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:09,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:09,233 INFO L93 Difference]: Finished difference Result 471 states and 730 transitions. [2021-11-09 10:45:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 101 [2021-11-09 10:45:09,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:09,235 INFO L225 Difference]: With dead ends: 471 [2021-11-09 10:45:09,235 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 10:45:09,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:09,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 10:45:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2021-11-09 10:45:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5493562231759657) internal successors, (361), 233 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 361 transitions. [2021-11-09 10:45:09,243 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 361 transitions. Word has length 101 [2021-11-09 10:45:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:09,243 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 361 transitions. [2021-11-09 10:45:09,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 361 transitions. [2021-11-09 10:45:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 10:45:09,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:09,245 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:09,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 10:45:09,245 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash 951050022, now seen corresponding path program 1 times [2021-11-09 10:45:09,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:09,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420700444] [2021-11-09 10:45:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:09,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:09,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:09,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420700444] [2021-11-09 10:45:09,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420700444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:09,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:09,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969150009] [2021-11-09 10:45:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:09,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:09,317 INFO L87 Difference]: Start difference. First operand 234 states and 361 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:11,589 INFO L93 Difference]: Finished difference Result 469 states and 726 transitions. [2021-11-09 10:45:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 101 [2021-11-09 10:45:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:11,600 INFO L225 Difference]: With dead ends: 469 [2021-11-09 10:45:11,600 INFO L226 Difference]: Without dead ends: 256 [2021-11-09 10:45:11,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-09 10:45:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 234. [2021-11-09 10:45:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5450643776824033) internal successors, (360), 233 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 360 transitions. [2021-11-09 10:45:11,608 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 360 transitions. Word has length 101 [2021-11-09 10:45:11,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:11,609 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 360 transitions. [2021-11-09 10:45:11,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:11,609 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 360 transitions. [2021-11-09 10:45:11,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 10:45:11,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:11,611 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 10:45:11,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 10:45:11,611 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:11,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:11,611 INFO L85 PathProgramCache]: Analyzing trace with hash 78534436, now seen corresponding path program 1 times [2021-11-09 10:45:11,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:11,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401837846] [2021-11-09 10:45:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:11,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:11,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:11,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401837846] [2021-11-09 10:45:11,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401837846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:11,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:11,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:11,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405443210] [2021-11-09 10:45:11,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:11,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:11,681 INFO L87 Difference]: Start difference. First operand 234 states and 360 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:14,109 INFO L93 Difference]: Finished difference Result 500 states and 765 transitions. [2021-11-09 10:45:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 101 [2021-11-09 10:45:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:14,112 INFO L225 Difference]: With dead ends: 500 [2021-11-09 10:45:14,112 INFO L226 Difference]: Without dead ends: 287 [2021-11-09 10:45:14,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-09 10:45:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 234. [2021-11-09 10:45:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5407725321888412) internal successors, (359), 233 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 359 transitions. [2021-11-09 10:45:14,120 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 359 transitions. Word has length 101 [2021-11-09 10:45:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:14,120 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 359 transitions. [2021-11-09 10:45:14,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 359 transitions. [2021-11-09 10:45:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-09 10:45:14,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:14,122 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:14,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 10:45:14,123 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash 517320936, now seen corresponding path program 1 times [2021-11-09 10:45:14,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:14,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705107292] [2021-11-09 10:45:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:14,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:14,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:14,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705107292] [2021-11-09 10:45:14,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705107292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:14,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:14,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:14,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974956560] [2021-11-09 10:45:14,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:14,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:14,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:14,196 INFO L87 Difference]: Start difference. First operand 234 states and 359 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:16,580 INFO L93 Difference]: Finished difference Result 498 states and 761 transitions. [2021-11-09 10:45:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 101 [2021-11-09 10:45:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:16,582 INFO L225 Difference]: With dead ends: 498 [2021-11-09 10:45:16,582 INFO L226 Difference]: Without dead ends: 285 [2021-11-09 10:45:16,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-09 10:45:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 234. [2021-11-09 10:45:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.536480686695279) internal successors, (358), 233 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 358 transitions. [2021-11-09 10:45:16,590 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 358 transitions. Word has length 101 [2021-11-09 10:45:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:16,590 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 358 transitions. [2021-11-09 10:45:16,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 358 transitions. [2021-11-09 10:45:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 10:45:16,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:16,592 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:16,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 10:45:16,592 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash -911758543, now seen corresponding path program 1 times [2021-11-09 10:45:16,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:16,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178889060] [2021-11-09 10:45:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:16,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:16,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:16,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178889060] [2021-11-09 10:45:16,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178889060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:16,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:16,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:16,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636495744] [2021-11-09 10:45:16,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:16,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:16,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:16,682 INFO L87 Difference]: Start difference. First operand 234 states and 358 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:18,975 INFO L93 Difference]: Finished difference Result 468 states and 719 transitions. [2021-11-09 10:45:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:18,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 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 102 [2021-11-09 10:45:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:18,977 INFO L225 Difference]: With dead ends: 468 [2021-11-09 10:45:18,977 INFO L226 Difference]: Without dead ends: 255 [2021-11-09 10:45:18,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-09 10:45:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2021-11-09 10:45:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.5321888412017168) internal successors, (357), 233 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 357 transitions. [2021-11-09 10:45:18,985 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 357 transitions. Word has length 102 [2021-11-09 10:45:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:18,986 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 357 transitions. [2021-11-09 10:45:18,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 357 transitions. [2021-11-09 10:45:18,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-09 10:45:18,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:18,988 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:18,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 10:45:18,988 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1257708997, now seen corresponding path program 1 times [2021-11-09 10:45:18,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:18,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944237314] [2021-11-09 10:45:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-09 10:45:19,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:19,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944237314] [2021-11-09 10:45:19,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944237314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:19,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:19,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:45:19,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250247300] [2021-11-09 10:45:19,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:45:19,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:19,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:45:19,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:19,081 INFO L87 Difference]: Start difference. First operand 234 states and 357 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:23,501 INFO L93 Difference]: Finished difference Result 468 states and 719 transitions. [2021-11-09 10:45:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-09 10:45:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:23,503 INFO L225 Difference]: With dead ends: 468 [2021-11-09 10:45:23,503 INFO L226 Difference]: Without dead ends: 255 [2021-11-09 10:45:23,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:45:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-09 10:45:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2021-11-09 10:45:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.5138339920948616) internal successors, (383), 253 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 383 transitions. [2021-11-09 10:45:23,512 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 383 transitions. Word has length 102 [2021-11-09 10:45:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:23,512 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 383 transitions. [2021-11-09 10:45:23,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 383 transitions. [2021-11-09 10:45:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 10:45:23,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:23,514 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:23,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-09 10:45:23,514 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1388772776, now seen corresponding path program 1 times [2021-11-09 10:45:23,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:23,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062367855] [2021-11-09 10:45:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:23,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:23,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:23,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062367855] [2021-11-09 10:45:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062367855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:23,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:23,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:23,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566138437] [2021-11-09 10:45:23,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:23,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:23,583 INFO L87 Difference]: Start difference. First operand 254 states and 383 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:25,856 INFO L93 Difference]: Finished difference Result 508 states and 768 transitions. [2021-11-09 10:45:25,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:25,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 103 [2021-11-09 10:45:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:25,858 INFO L225 Difference]: With dead ends: 508 [2021-11-09 10:45:25,858 INFO L226 Difference]: Without dead ends: 275 [2021-11-09 10:45:25,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-09 10:45:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 254. [2021-11-09 10:45:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.5098814229249011) internal successors, (382), 253 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 382 transitions. [2021-11-09 10:45:25,867 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 382 transitions. Word has length 103 [2021-11-09 10:45:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:25,867 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 382 transitions. [2021-11-09 10:45:25,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 382 transitions. [2021-11-09 10:45:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 10:45:25,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:25,869 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:25,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 10:45:25,869 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:25,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1590596710, now seen corresponding path program 1 times [2021-11-09 10:45:25,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:25,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758835321] [2021-11-09 10:45:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:25,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:25,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:25,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758835321] [2021-11-09 10:45:25,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758835321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:25,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:25,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:25,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489453817] [2021-11-09 10:45:25,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:25,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:25,943 INFO L87 Difference]: Start difference. First operand 254 states and 382 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:28,307 INFO L93 Difference]: Finished difference Result 537 states and 805 transitions. [2021-11-09 10:45:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 103 [2021-11-09 10:45:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:28,309 INFO L225 Difference]: With dead ends: 537 [2021-11-09 10:45:28,309 INFO L226 Difference]: Without dead ends: 304 [2021-11-09 10:45:28,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-09 10:45:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 254. [2021-11-09 10:45:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.5059288537549407) internal successors, (381), 253 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 381 transitions. [2021-11-09 10:45:28,318 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 381 transitions. Word has length 103 [2021-11-09 10:45:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:28,318 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 381 transitions. [2021-11-09 10:45:28,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 381 transitions. [2021-11-09 10:45:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-09 10:45:28,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:28,320 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:28,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 10:45:28,320 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash 539398994, now seen corresponding path program 1 times [2021-11-09 10:45:28,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:28,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486320915] [2021-11-09 10:45:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:28,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:28,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:28,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486320915] [2021-11-09 10:45:28,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486320915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:28,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:28,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:28,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569599361] [2021-11-09 10:45:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:28,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:28,386 INFO L87 Difference]: Start difference. First operand 254 states and 381 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:30,706 INFO L93 Difference]: Finished difference Result 508 states and 764 transitions. [2021-11-09 10:45:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:30,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 104 [2021-11-09 10:45:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:30,708 INFO L225 Difference]: With dead ends: 508 [2021-11-09 10:45:30,708 INFO L226 Difference]: Without dead ends: 275 [2021-11-09 10:45:30,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-09 10:45:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 254. [2021-11-09 10:45:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.5019762845849802) internal successors, (380), 253 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 380 transitions. [2021-11-09 10:45:30,717 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 380 transitions. Word has length 104 [2021-11-09 10:45:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:30,717 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 380 transitions. [2021-11-09 10:45:30,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 380 transitions. [2021-11-09 10:45:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-09 10:45:30,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:30,719 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:30,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-09 10:45:30,720 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1422175664, now seen corresponding path program 1 times [2021-11-09 10:45:30,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:30,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027879469] [2021-11-09 10:45:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:30,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:30,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:30,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027879469] [2021-11-09 10:45:30,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027879469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:30,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:30,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:30,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579607089] [2021-11-09 10:45:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:30,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:30,791 INFO L87 Difference]: Start difference. First operand 254 states and 380 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:33,194 INFO L93 Difference]: Finished difference Result 537 states and 801 transitions. [2021-11-09 10:45:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 104 [2021-11-09 10:45:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:33,196 INFO L225 Difference]: With dead ends: 537 [2021-11-09 10:45:33,196 INFO L226 Difference]: Without dead ends: 304 [2021-11-09 10:45:33,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-09 10:45:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 254. [2021-11-09 10:45:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.4980237154150198) internal successors, (379), 253 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 379 transitions. [2021-11-09 10:45:33,205 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 379 transitions. Word has length 104 [2021-11-09 10:45:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:33,206 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 379 transitions. [2021-11-09 10:45:33,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 379 transitions. [2021-11-09 10:45:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 10:45:33,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:33,207 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:33,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-09 10:45:33,208 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -265935501, now seen corresponding path program 1 times [2021-11-09 10:45:33,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:33,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005953740] [2021-11-09 10:45:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:33,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:33,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:33,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005953740] [2021-11-09 10:45:33,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005953740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:33,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:33,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:33,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063329005] [2021-11-09 10:45:33,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:33,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:33,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:33,284 INFO L87 Difference]: Start difference. First operand 254 states and 379 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:35,552 INFO L93 Difference]: Finished difference Result 508 states and 760 transitions. [2021-11-09 10:45:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-09 10:45:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:35,554 INFO L225 Difference]: With dead ends: 508 [2021-11-09 10:45:35,554 INFO L226 Difference]: Without dead ends: 275 [2021-11-09 10:45:35,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-09 10:45:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 254. [2021-11-09 10:45:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.4940711462450593) internal successors, (378), 253 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 378 transitions. [2021-11-09 10:45:35,563 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 378 transitions. Word has length 105 [2021-11-09 10:45:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:35,563 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 378 transitions. [2021-11-09 10:45:35,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 378 transitions. [2021-11-09 10:45:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 10:45:35,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:35,565 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:35,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-09 10:45:35,565 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -945207755, now seen corresponding path program 1 times [2021-11-09 10:45:35,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:35,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610340926] [2021-11-09 10:45:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:35,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:35,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:35,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610340926] [2021-11-09 10:45:35,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610340926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:35,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:35,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:35,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89707200] [2021-11-09 10:45:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:35,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:35,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:35,633 INFO L87 Difference]: Start difference. First operand 254 states and 378 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:38,055 INFO L93 Difference]: Finished difference Result 537 states and 797 transitions. [2021-11-09 10:45:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-09 10:45:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:38,057 INFO L225 Difference]: With dead ends: 537 [2021-11-09 10:45:38,057 INFO L226 Difference]: Without dead ends: 304 [2021-11-09 10:45:38,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-09 10:45:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 254. [2021-11-09 10:45:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.4901185770750989) internal successors, (377), 253 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 377 transitions. [2021-11-09 10:45:38,066 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 377 transitions. Word has length 105 [2021-11-09 10:45:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:38,067 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 377 transitions. [2021-11-09 10:45:38,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 377 transitions. [2021-11-09 10:45:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 10:45:38,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:38,068 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:38,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-09 10:45:38,069 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 89381709, now seen corresponding path program 1 times [2021-11-09 10:45:38,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:38,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524748455] [2021-11-09 10:45:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:38,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:38,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:38,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524748455] [2021-11-09 10:45:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524748455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:38,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:38,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:38,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686885978] [2021-11-09 10:45:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:38,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:38,136 INFO L87 Difference]: Start difference. First operand 254 states and 377 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:40,456 INFO L93 Difference]: Finished difference Result 498 states and 744 transitions. [2021-11-09 10:45:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 10:45:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:40,457 INFO L225 Difference]: With dead ends: 498 [2021-11-09 10:45:40,457 INFO L226 Difference]: Without dead ends: 265 [2021-11-09 10:45:40,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-09 10:45:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 254. [2021-11-09 10:45:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.4861660079051384) internal successors, (376), 253 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 376 transitions. [2021-11-09 10:45:40,466 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 376 transitions. Word has length 106 [2021-11-09 10:45:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:40,467 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 376 transitions. [2021-11-09 10:45:40,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 376 transitions. [2021-11-09 10:45:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-09 10:45:40,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:40,468 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:40,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-09 10:45:40,469 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:40,470 INFO L85 PathProgramCache]: Analyzing trace with hash 506778315, now seen corresponding path program 1 times [2021-11-09 10:45:40,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:40,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214063740] [2021-11-09 10:45:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:45:40,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:40,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214063740] [2021-11-09 10:45:40,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214063740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:40,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:40,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:40,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300440837] [2021-11-09 10:45:40,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:40,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:40,556 INFO L87 Difference]: Start difference. First operand 254 states and 376 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:42,980 INFO L93 Difference]: Finished difference Result 527 states and 781 transitions. [2021-11-09 10:45:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-09 10:45:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:42,983 INFO L225 Difference]: With dead ends: 527 [2021-11-09 10:45:42,983 INFO L226 Difference]: Without dead ends: 294 [2021-11-09 10:45:42,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-09 10:45:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 254. [2021-11-09 10:45:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.482213438735178) internal successors, (375), 253 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 375 transitions. [2021-11-09 10:45:42,992 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 375 transitions. Word has length 106 [2021-11-09 10:45:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:42,993 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 375 transitions. [2021-11-09 10:45:42,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 375 transitions. [2021-11-09 10:45:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 10:45:42,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:42,994 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:42,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-09 10:45:42,995 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1985948577, now seen corresponding path program 1 times [2021-11-09 10:45:42,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:42,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541099412] [2021-11-09 10:45:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:42,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 10:45:43,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:43,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541099412] [2021-11-09 10:45:43,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541099412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:43,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:43,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:43,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366456382] [2021-11-09 10:45:43,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:43,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:43,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:43,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,061 INFO L87 Difference]: Start difference. First operand 254 states and 375 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:43,095 INFO L93 Difference]: Finished difference Result 716 states and 1072 transitions. [2021-11-09 10:45:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:43,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-09 10:45:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:43,098 INFO L225 Difference]: With dead ends: 716 [2021-11-09 10:45:43,099 INFO L226 Difference]: Without dead ends: 483 [2021-11-09 10:45:43,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-09 10:45:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2021-11-09 10:45:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 1.4854771784232366) internal successors, (716), 482 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 716 transitions. [2021-11-09 10:45:43,129 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 716 transitions. Word has length 109 [2021-11-09 10:45:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:43,130 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 716 transitions. [2021-11-09 10:45:43,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 716 transitions. [2021-11-09 10:45:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 10:45:43,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:43,132 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-09 10:45:43,133 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1032008419, now seen corresponding path program 1 times [2021-11-09 10:45:43,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:43,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206312776] [2021-11-09 10:45:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-09 10:45:43,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:43,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206312776] [2021-11-09 10:45:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206312776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:43,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:43,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:43,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064311035] [2021-11-09 10:45:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:43,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:43,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:43,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,184 INFO L87 Difference]: Start difference. First operand 483 states and 716 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:43,212 INFO L93 Difference]: Finished difference Result 972 states and 1444 transitions. [2021-11-09 10:45:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:43,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 109 [2021-11-09 10:45:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:43,216 INFO L225 Difference]: With dead ends: 972 [2021-11-09 10:45:43,216 INFO L226 Difference]: Without dead ends: 510 [2021-11-09 10:45:43,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-09 10:45:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-11-09 10:45:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.475442043222004) internal successors, (751), 509 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 751 transitions. [2021-11-09 10:45:43,234 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 751 transitions. Word has length 109 [2021-11-09 10:45:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:43,235 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 751 transitions. [2021-11-09 10:45:43,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 751 transitions. [2021-11-09 10:45:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 10:45:43,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:43,237 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:43,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-09 10:45:43,237 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2026702117, now seen corresponding path program 1 times [2021-11-09 10:45:43,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:43,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062285072] [2021-11-09 10:45:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:43,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-09 10:45:43,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:43,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062285072] [2021-11-09 10:45:43,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062285072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:43,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:43,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:43,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939415925] [2021-11-09 10:45:43,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:43,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,281 INFO L87 Difference]: Start difference. First operand 510 states and 751 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:43,305 INFO L93 Difference]: Finished difference Result 1001 states and 1480 transitions. [2021-11-09 10:45:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 109 [2021-11-09 10:45:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:43,309 INFO L225 Difference]: With dead ends: 1001 [2021-11-09 10:45:43,309 INFO L226 Difference]: Without dead ends: 512 [2021-11-09 10:45:43,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-09 10:45:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2021-11-09 10:45:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.4735812133072408) internal successors, (753), 511 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 753 transitions. [2021-11-09 10:45:43,326 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 753 transitions. Word has length 109 [2021-11-09 10:45:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:43,326 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 753 transitions. [2021-11-09 10:45:43,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 753 transitions. [2021-11-09 10:45:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-09 10:45:43,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:43,328 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 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] [2021-11-09 10:45:43,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-09 10:45:43,334 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:43,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash 187771396, now seen corresponding path program 1 times [2021-11-09 10:45:43,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:43,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829792857] [2021-11-09 10:45:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:43,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 10:45:43,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:43,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829792857] [2021-11-09 10:45:43,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829792857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:43,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:43,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:43,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868491705] [2021-11-09 10:45:43,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:43,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,407 INFO L87 Difference]: Start difference. First operand 512 states and 753 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:43,449 INFO L93 Difference]: Finished difference Result 1232 states and 1828 transitions. [2021-11-09 10:45:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 128 [2021-11-09 10:45:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:43,454 INFO L225 Difference]: With dead ends: 1232 [2021-11-09 10:45:43,454 INFO L226 Difference]: Without dead ends: 743 [2021-11-09 10:45:43,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-09 10:45:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 743. [2021-11-09 10:45:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.482479784366577) internal successors, (1100), 742 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1100 transitions. [2021-11-09 10:45:43,495 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1100 transitions. Word has length 128 [2021-11-09 10:45:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:43,496 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1100 transitions. [2021-11-09 10:45:43,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,497 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1100 transitions. [2021-11-09 10:45:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-09 10:45:43,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:43,499 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:43,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-09 10:45:43,500 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1138149931, now seen corresponding path program 1 times [2021-11-09 10:45:43,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:43,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528758799] [2021-11-09 10:45:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:43,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 10:45:43,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528758799] [2021-11-09 10:45:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528758799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:43,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:43,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:43,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284308841] [2021-11-09 10:45:43,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:43,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:43,600 INFO L87 Difference]: Start difference. First operand 743 states and 1100 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:46,127 INFO L93 Difference]: Finished difference Result 1670 states and 2488 transitions. [2021-11-09 10:45:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:46,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 167 [2021-11-09 10:45:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:46,133 INFO L225 Difference]: With dead ends: 1670 [2021-11-09 10:45:46,133 INFO L226 Difference]: Without dead ends: 950 [2021-11-09 10:45:46,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-09 10:45:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 821. [2021-11-09 10:45:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 1.5146341463414634) internal successors, (1242), 820 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1242 transitions. [2021-11-09 10:45:46,162 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1242 transitions. Word has length 167 [2021-11-09 10:45:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:46,162 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1242 transitions. [2021-11-09 10:45:46,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1242 transitions. [2021-11-09 10:45:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-09 10:45:46,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:46,166 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:46,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-09 10:45:46,167 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1558996852, now seen corresponding path program 1 times [2021-11-09 10:45:46,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:46,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070386160] [2021-11-09 10:45:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:46,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 10:45:46,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:46,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070386160] [2021-11-09 10:45:46,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070386160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:46,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:46,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:46,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084398053] [2021-11-09 10:45:46,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:46,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:46,268 INFO L87 Difference]: Start difference. First operand 821 states and 1242 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:48,750 INFO L93 Difference]: Finished difference Result 1740 states and 2616 transitions. [2021-11-09 10:45:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 168 [2021-11-09 10:45:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:48,756 INFO L225 Difference]: With dead ends: 1740 [2021-11-09 10:45:48,757 INFO L226 Difference]: Without dead ends: 942 [2021-11-09 10:45:48,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-09 10:45:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 823. [2021-11-09 10:45:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 1.5133819951338199) internal successors, (1244), 822 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1244 transitions. [2021-11-09 10:45:48,785 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1244 transitions. Word has length 168 [2021-11-09 10:45:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:48,786 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 1244 transitions. [2021-11-09 10:45:48,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1244 transitions. [2021-11-09 10:45:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-09 10:45:48,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:48,789 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:48,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-09 10:45:48,790 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash -726211937, now seen corresponding path program 1 times [2021-11-09 10:45:48,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:48,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244047338] [2021-11-09 10:45:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:48,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-09 10:45:48,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:48,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244047338] [2021-11-09 10:45:48,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244047338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:48,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:48,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:48,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539249314] [2021-11-09 10:45:48,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:48,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:48,891 INFO L87 Difference]: Start difference. First operand 823 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:51,287 INFO L93 Difference]: Finished difference Result 1840 states and 2793 transitions. [2021-11-09 10:45:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 180 [2021-11-09 10:45:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:51,295 INFO L225 Difference]: With dead ends: 1840 [2021-11-09 10:45:51,295 INFO L226 Difference]: Without dead ends: 1040 [2021-11-09 10:45:51,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-11-09 10:45:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 919. [2021-11-09 10:45:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5413943355119826) internal successors, (1415), 918 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1415 transitions. [2021-11-09 10:45:51,333 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1415 transitions. Word has length 180 [2021-11-09 10:45:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:51,335 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1415 transitions. [2021-11-09 10:45:51,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1415 transitions. [2021-11-09 10:45:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-09 10:45:51,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:51,339 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:51,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-09 10:45:51,339 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -295851907, now seen corresponding path program 1 times [2021-11-09 10:45:51,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:51,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112819897] [2021-11-09 10:45:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:51,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:45:51,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:51,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112819897] [2021-11-09 10:45:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112819897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:51,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420400955] [2021-11-09 10:45:51,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:51,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:51,422 INFO L87 Difference]: Start difference. First operand 919 states and 1415 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:53,921 INFO L93 Difference]: Finished difference Result 1932 states and 2956 transitions. [2021-11-09 10:45:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-09 10:45:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:53,928 INFO L225 Difference]: With dead ends: 1932 [2021-11-09 10:45:53,928 INFO L226 Difference]: Without dead ends: 1036 [2021-11-09 10:45:53,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-11-09 10:45:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 919. [2021-11-09 10:45:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5392156862745099) internal successors, (1413), 918 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1413 transitions. [2021-11-09 10:45:53,956 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1413 transitions. Word has length 181 [2021-11-09 10:45:53,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:53,956 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1413 transitions. [2021-11-09 10:45:53,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1413 transitions. [2021-11-09 10:45:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 10:45:53,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:53,962 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:53,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-09 10:45:53,962 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash -374143289, now seen corresponding path program 1 times [2021-11-09 10:45:53,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:53,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5603076] [2021-11-09 10:45:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:53,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:45:54,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:54,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5603076] [2021-11-09 10:45:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5603076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:54,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:54,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:54,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290050891] [2021-11-09 10:45:54,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:54,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:54,041 INFO L87 Difference]: Start difference. First operand 919 states and 1413 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:56,522 INFO L93 Difference]: Finished difference Result 1932 states and 2952 transitions. [2021-11-09 10:45:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:56,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 183 [2021-11-09 10:45:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:56,529 INFO L225 Difference]: With dead ends: 1932 [2021-11-09 10:45:56,529 INFO L226 Difference]: Without dead ends: 1036 [2021-11-09 10:45:56,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-11-09 10:45:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 919. [2021-11-09 10:45:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.537037037037037) internal successors, (1411), 918 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1411 transitions. [2021-11-09 10:45:56,557 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1411 transitions. Word has length 183 [2021-11-09 10:45:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:56,557 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1411 transitions. [2021-11-09 10:45:56,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1411 transitions. [2021-11-09 10:45:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-09 10:45:56,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:56,561 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:56,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-09 10:45:56,562 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash 100272045, now seen corresponding path program 1 times [2021-11-09 10:45:56,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:56,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674319901] [2021-11-09 10:45:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:56,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:45:56,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:56,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674319901] [2021-11-09 10:45:56,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674319901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:56,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:56,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:56,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614763515] [2021-11-09 10:45:56,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:56,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:56,643 INFO L87 Difference]: Start difference. First operand 919 states and 1411 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:59,050 INFO L93 Difference]: Finished difference Result 1932 states and 2948 transitions. [2021-11-09 10:45:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 184 [2021-11-09 10:45:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:59,057 INFO L225 Difference]: With dead ends: 1932 [2021-11-09 10:45:59,057 INFO L226 Difference]: Without dead ends: 1036 [2021-11-09 10:45:59,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-11-09 10:45:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 919. [2021-11-09 10:45:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5348583877995643) internal successors, (1409), 918 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1409 transitions. [2021-11-09 10:45:59,086 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1409 transitions. Word has length 184 [2021-11-09 10:45:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:59,086 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1409 transitions. [2021-11-09 10:45:59,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1409 transitions. [2021-11-09 10:45:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-09 10:45:59,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:59,090 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:45:59,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-09 10:45:59,090 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:59,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1365757772, now seen corresponding path program 1 times [2021-11-09 10:45:59,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:59,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808711428] [2021-11-09 10:45:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:59,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:45:59,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:59,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808711428] [2021-11-09 10:45:59,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808711428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:59,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:59,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:45:59,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934714806] [2021-11-09 10:45:59,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:45:59,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:59,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:45:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:45:59,173 INFO L87 Difference]: Start difference. First operand 919 states and 1409 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:01,590 INFO L93 Difference]: Finished difference Result 1932 states and 2944 transitions. [2021-11-09 10:46:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:01,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 185 [2021-11-09 10:46:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:01,596 INFO L225 Difference]: With dead ends: 1932 [2021-11-09 10:46:01,597 INFO L226 Difference]: Without dead ends: 1036 [2021-11-09 10:46:01,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-11-09 10:46:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 919. [2021-11-09 10:46:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5326797385620916) internal successors, (1407), 918 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1407 transitions. [2021-11-09 10:46:01,636 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1407 transitions. Word has length 185 [2021-11-09 10:46:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:01,636 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1407 transitions. [2021-11-09 10:46:01,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1407 transitions. [2021-11-09 10:46:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-09 10:46:01,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:01,640 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-09 10:46:01,640 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1384621906, now seen corresponding path program 1 times [2021-11-09 10:46:01,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:01,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473580646] [2021-11-09 10:46:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:01,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:01,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:01,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473580646] [2021-11-09 10:46:01,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473580646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:01,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:01,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:01,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008643742] [2021-11-09 10:46:01,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:01,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:01,717 INFO L87 Difference]: Start difference. First operand 919 states and 1407 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:04,086 INFO L93 Difference]: Finished difference Result 1912 states and 2916 transitions. [2021-11-09 10:46:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:04,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 186 [2021-11-09 10:46:04,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:04,090 INFO L225 Difference]: With dead ends: 1912 [2021-11-09 10:46:04,090 INFO L226 Difference]: Without dead ends: 1016 [2021-11-09 10:46:04,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-09 10:46:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 919. [2021-11-09 10:46:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5305010893246187) internal successors, (1405), 918 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1405 transitions. [2021-11-09 10:46:04,117 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1405 transitions. Word has length 186 [2021-11-09 10:46:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:04,118 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1405 transitions. [2021-11-09 10:46:04,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1405 transitions. [2021-11-09 10:46:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-09 10:46:04,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:04,121 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:04,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-09 10:46:04,121 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -17936658, now seen corresponding path program 1 times [2021-11-09 10:46:04,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:04,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472121157] [2021-11-09 10:46:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:04,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:04,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:04,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472121157] [2021-11-09 10:46:04,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472121157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:04,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:04,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:04,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416445855] [2021-11-09 10:46:04,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:04,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:04,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:04,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:04,199 INFO L87 Difference]: Start difference. First operand 919 states and 1405 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:06,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:06,572 INFO L93 Difference]: Finished difference Result 1912 states and 2912 transitions. [2021-11-09 10:46:06,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 189 [2021-11-09 10:46:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:06,579 INFO L225 Difference]: With dead ends: 1912 [2021-11-09 10:46:06,579 INFO L226 Difference]: Without dead ends: 1016 [2021-11-09 10:46:06,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-09 10:46:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 919. [2021-11-09 10:46:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.528322440087146) internal successors, (1403), 918 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1403 transitions. [2021-11-09 10:46:06,607 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1403 transitions. Word has length 189 [2021-11-09 10:46:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:06,608 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1403 transitions. [2021-11-09 10:46:06,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1403 transitions. [2021-11-09 10:46:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-09 10:46:06,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:06,611 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:06,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-09 10:46:06,612 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash 454702816, now seen corresponding path program 1 times [2021-11-09 10:46:06,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:06,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25674397] [2021-11-09 10:46:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:06,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:06,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:06,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25674397] [2021-11-09 10:46:06,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25674397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:06,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:06,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:06,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294525067] [2021-11-09 10:46:06,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:06,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:06,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:06,700 INFO L87 Difference]: Start difference. First operand 919 states and 1403 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:09,084 INFO L93 Difference]: Finished difference Result 1912 states and 2908 transitions. [2021-11-09 10:46:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 189 [2021-11-09 10:46:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:09,089 INFO L225 Difference]: With dead ends: 1912 [2021-11-09 10:46:09,089 INFO L226 Difference]: Without dead ends: 1016 [2021-11-09 10:46:09,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-11-09 10:46:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 919. [2021-11-09 10:46:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.526143790849673) internal successors, (1401), 918 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1401 transitions. [2021-11-09 10:46:09,134 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1401 transitions. Word has length 189 [2021-11-09 10:46:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:09,135 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1401 transitions. [2021-11-09 10:46:09,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1401 transitions. [2021-11-09 10:46:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 10:46:09,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:09,138 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:09,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-09 10:46:09,139 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1537992308, now seen corresponding path program 1 times [2021-11-09 10:46:09,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:09,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901938606] [2021-11-09 10:46:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:09,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:09,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:09,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901938606] [2021-11-09 10:46:09,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901938606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:09,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:09,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:09,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149330347] [2021-11-09 10:46:09,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:09,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:09,219 INFO L87 Difference]: Start difference. First operand 919 states and 1401 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:11,676 INFO L93 Difference]: Finished difference Result 1902 states and 2889 transitions. [2021-11-09 10:46:11,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:11,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 190 [2021-11-09 10:46:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:11,682 INFO L225 Difference]: With dead ends: 1902 [2021-11-09 10:46:11,682 INFO L226 Difference]: Without dead ends: 1006 [2021-11-09 10:46:11,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-11-09 10:46:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 919. [2021-11-09 10:46:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5239651416122004) internal successors, (1399), 918 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1399 transitions. [2021-11-09 10:46:11,706 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1399 transitions. Word has length 190 [2021-11-09 10:46:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:11,707 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1399 transitions. [2021-11-09 10:46:11,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1399 transitions. [2021-11-09 10:46:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-09 10:46:11,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:11,710 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:11,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-09 10:46:11,711 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1805401862, now seen corresponding path program 1 times [2021-11-09 10:46:11,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:11,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077812130] [2021-11-09 10:46:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:11,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:11,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:11,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077812130] [2021-11-09 10:46:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077812130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:11,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:11,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:11,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584877406] [2021-11-09 10:46:11,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:11,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:11,793 INFO L87 Difference]: Start difference. First operand 919 states and 1399 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:14,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:14,210 INFO L93 Difference]: Finished difference Result 1894 states and 2875 transitions. [2021-11-09 10:46:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:14,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 190 [2021-11-09 10:46:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:14,215 INFO L225 Difference]: With dead ends: 1894 [2021-11-09 10:46:14,215 INFO L226 Difference]: Without dead ends: 998 [2021-11-09 10:46:14,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-09 10:46:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 919. [2021-11-09 10:46:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5217864923747277) internal successors, (1397), 918 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1397 transitions. [2021-11-09 10:46:14,242 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1397 transitions. Word has length 190 [2021-11-09 10:46:14,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:14,242 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1397 transitions. [2021-11-09 10:46:14,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1397 transitions. [2021-11-09 10:46:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-09 10:46:14,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:14,246 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:14,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-09 10:46:14,246 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash -642427646, now seen corresponding path program 1 times [2021-11-09 10:46:14,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:14,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744798028] [2021-11-09 10:46:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:14,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:14,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:14,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744798028] [2021-11-09 10:46:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744798028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:14,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:14,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:14,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101161402] [2021-11-09 10:46:14,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:14,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:14,347 INFO L87 Difference]: Start difference. First operand 919 states and 1397 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:16,789 INFO L93 Difference]: Finished difference Result 1894 states and 2871 transitions. [2021-11-09 10:46:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-09 10:46:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:16,794 INFO L225 Difference]: With dead ends: 1894 [2021-11-09 10:46:16,794 INFO L226 Difference]: Without dead ends: 998 [2021-11-09 10:46:16,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-09 10:46:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 919. [2021-11-09 10:46:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5196078431372548) internal successors, (1395), 918 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1395 transitions. [2021-11-09 10:46:16,824 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1395 transitions. Word has length 192 [2021-11-09 10:46:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:16,824 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1395 transitions. [2021-11-09 10:46:16,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1395 transitions. [2021-11-09 10:46:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-09 10:46:16,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:16,827 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:16,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-09 10:46:16,827 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash 705442268, now seen corresponding path program 1 times [2021-11-09 10:46:16,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:16,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180118032] [2021-11-09 10:46:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:16,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:16,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:16,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180118032] [2021-11-09 10:46:16,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180118032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:16,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:16,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:16,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317775105] [2021-11-09 10:46:16,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:16,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:16,907 INFO L87 Difference]: Start difference. First operand 919 states and 1395 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:19,285 INFO L93 Difference]: Finished difference Result 1878 states and 2841 transitions. [2021-11-09 10:46:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 193 [2021-11-09 10:46:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:19,291 INFO L225 Difference]: With dead ends: 1878 [2021-11-09 10:46:19,291 INFO L226 Difference]: Without dead ends: 982 [2021-11-09 10:46:19,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:19,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-09 10:46:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 919. [2021-11-09 10:46:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5174291938997821) internal successors, (1393), 918 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1393 transitions. [2021-11-09 10:46:19,314 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1393 transitions. Word has length 193 [2021-11-09 10:46:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:19,314 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1393 transitions. [2021-11-09 10:46:19,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1393 transitions. [2021-11-09 10:46:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-09 10:46:19,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:19,317 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:19,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-09 10:46:19,317 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1063262735, now seen corresponding path program 1 times [2021-11-09 10:46:19,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:19,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115400550] [2021-11-09 10:46:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:19,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 10:46:19,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:19,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115400550] [2021-11-09 10:46:19,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115400550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:19,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:19,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:19,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207188774] [2021-11-09 10:46:19,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:19,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:19,420 INFO L87 Difference]: Start difference. First operand 919 states and 1393 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:21,851 INFO L93 Difference]: Finished difference Result 1878 states and 2837 transitions. [2021-11-09 10:46:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 194 [2021-11-09 10:46:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:21,878 INFO L225 Difference]: With dead ends: 1878 [2021-11-09 10:46:21,879 INFO L226 Difference]: Without dead ends: 982 [2021-11-09 10:46:21,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-09 10:46:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 919. [2021-11-09 10:46:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5152505446623095) internal successors, (1391), 918 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1391 transitions. [2021-11-09 10:46:21,916 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1391 transitions. Word has length 194 [2021-11-09 10:46:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:21,916 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1391 transitions. [2021-11-09 10:46:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1391 transitions. [2021-11-09 10:46:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-09 10:46:21,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:21,920 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:21,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-09 10:46:21,920 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash -733794315, now seen corresponding path program 1 times [2021-11-09 10:46:21,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:21,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433939554] [2021-11-09 10:46:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:21,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:22,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:22,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433939554] [2021-11-09 10:46:22,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433939554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:22,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:22,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:22,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435048314] [2021-11-09 10:46:22,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:22,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:22,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:22,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:22,004 INFO L87 Difference]: Start difference. First operand 919 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:24,434 INFO L93 Difference]: Finished difference Result 1878 states and 2833 transitions. [2021-11-09 10:46:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-09 10:46:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:24,437 INFO L225 Difference]: With dead ends: 1878 [2021-11-09 10:46:24,437 INFO L226 Difference]: Without dead ends: 982 [2021-11-09 10:46:24,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-09 10:46:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 919. [2021-11-09 10:46:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5130718954248366) internal successors, (1389), 918 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1389 transitions. [2021-11-09 10:46:24,462 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1389 transitions. Word has length 195 [2021-11-09 10:46:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:24,463 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1389 transitions. [2021-11-09 10:46:24,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1389 transitions. [2021-11-09 10:46:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-09 10:46:24,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:24,465 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:24,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-09 10:46:24,466 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1055176693, now seen corresponding path program 1 times [2021-11-09 10:46:24,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:24,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677269922] [2021-11-09 10:46:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:24,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 10:46:24,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:24,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677269922] [2021-11-09 10:46:24,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677269922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:24,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:24,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:24,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706213297] [2021-11-09 10:46:24,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:24,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:24,579 INFO L87 Difference]: Start difference. First operand 919 states and 1389 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:27,002 INFO L93 Difference]: Finished difference Result 1874 states and 2825 transitions. [2021-11-09 10:46:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 195 [2021-11-09 10:46:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:27,005 INFO L225 Difference]: With dead ends: 1874 [2021-11-09 10:46:27,005 INFO L226 Difference]: Without dead ends: 978 [2021-11-09 10:46:27,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-09 10:46:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 919. [2021-11-09 10:46:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5108932461873639) internal successors, (1387), 918 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1387 transitions. [2021-11-09 10:46:27,033 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1387 transitions. Word has length 195 [2021-11-09 10:46:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:27,034 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1387 transitions. [2021-11-09 10:46:27,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1387 transitions. [2021-11-09 10:46:27,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 10:46:27,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:27,037 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:27,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-09 10:46:27,038 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash -332979141, now seen corresponding path program 1 times [2021-11-09 10:46:27,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:27,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13194983] [2021-11-09 10:46:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:27,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:27,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:27,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13194983] [2021-11-09 10:46:27,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13194983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:27,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:27,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:27,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397674103] [2021-11-09 10:46:27,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:27,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:27,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:27,180 INFO L87 Difference]: Start difference. First operand 919 states and 1387 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:29,588 INFO L93 Difference]: Finished difference Result 1870 states and 2815 transitions. [2021-11-09 10:46:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:29,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 196 [2021-11-09 10:46:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:29,591 INFO L225 Difference]: With dead ends: 1870 [2021-11-09 10:46:29,591 INFO L226 Difference]: Without dead ends: 974 [2021-11-09 10:46:29,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-09 10:46:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 919. [2021-11-09 10:46:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.508714596949891) internal successors, (1385), 918 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1385 transitions. [2021-11-09 10:46:29,632 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1385 transitions. Word has length 196 [2021-11-09 10:46:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:29,645 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1385 transitions. [2021-11-09 10:46:29,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1385 transitions. [2021-11-09 10:46:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-09 10:46:29,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:29,648 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:29,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-09 10:46:29,648 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1710315321, now seen corresponding path program 1 times [2021-11-09 10:46:29,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:29,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772384460] [2021-11-09 10:46:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:29,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:29,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:29,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772384460] [2021-11-09 10:46:29,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772384460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:29,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:29,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111289424] [2021-11-09 10:46:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:29,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:29,744 INFO L87 Difference]: Start difference. First operand 919 states and 1385 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:32,103 INFO L93 Difference]: Finished difference Result 1862 states and 2801 transitions. [2021-11-09 10:46:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 197 [2021-11-09 10:46:32,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:32,109 INFO L225 Difference]: With dead ends: 1862 [2021-11-09 10:46:32,110 INFO L226 Difference]: Without dead ends: 966 [2021-11-09 10:46:32,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-09 10:46:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 919. [2021-11-09 10:46:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5065359477124183) internal successors, (1383), 918 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1383 transitions. [2021-11-09 10:46:32,140 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1383 transitions. Word has length 197 [2021-11-09 10:46:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:32,141 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1383 transitions. [2021-11-09 10:46:32,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1383 transitions. [2021-11-09 10:46:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-09 10:46:32,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:32,144 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:32,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-09 10:46:32,144 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:32,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1676610658, now seen corresponding path program 1 times [2021-11-09 10:46:32,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:32,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444945089] [2021-11-09 10:46:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:32,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:32,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:32,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444945089] [2021-11-09 10:46:32,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444945089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:32,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:32,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:32,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426244497] [2021-11-09 10:46:32,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:32,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:32,235 INFO L87 Difference]: Start difference. First operand 919 states and 1383 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:33,362 INFO L93 Difference]: Finished difference Result 1862 states and 2797 transitions. [2021-11-09 10:46:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 198 [2021-11-09 10:46:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:33,364 INFO L225 Difference]: With dead ends: 1862 [2021-11-09 10:46:33,364 INFO L226 Difference]: Without dead ends: 966 [2021-11-09 10:46:33,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-09 10:46:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 919. [2021-11-09 10:46:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5043572984749456) internal successors, (1381), 918 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1381 transitions. [2021-11-09 10:46:33,393 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1381 transitions. Word has length 198 [2021-11-09 10:46:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:33,394 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1381 transitions. [2021-11-09 10:46:33,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1381 transitions. [2021-11-09 10:46:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-09 10:46:33,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:33,397 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:33,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-09 10:46:33,398 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:33,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1345804093, now seen corresponding path program 1 times [2021-11-09 10:46:33,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:33,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907233210] [2021-11-09 10:46:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:33,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:33,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:33,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907233210] [2021-11-09 10:46:33,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907233210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:33,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:33,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:33,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080481730] [2021-11-09 10:46:33,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:33,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:33,529 INFO L87 Difference]: Start difference. First operand 919 states and 1381 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:35,898 INFO L93 Difference]: Finished difference Result 1854 states and 2783 transitions. [2021-11-09 10:46:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-09 10:46:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:35,901 INFO L225 Difference]: With dead ends: 1854 [2021-11-09 10:46:35,901 INFO L226 Difference]: Without dead ends: 958 [2021-11-09 10:46:35,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-09 10:46:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 919. [2021-11-09 10:46:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5021786492374727) internal successors, (1379), 918 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1379 transitions. [2021-11-09 10:46:35,926 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1379 transitions. Word has length 199 [2021-11-09 10:46:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:35,927 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1379 transitions. [2021-11-09 10:46:35,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1379 transitions. [2021-11-09 10:46:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-09 10:46:35,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:35,929 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 10:46:35,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-11-09 10:46:35,930 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash -966094260, now seen corresponding path program 1 times [2021-11-09 10:46:35,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:35,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696333510] [2021-11-09 10:46:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:35,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:36,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:36,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696333510] [2021-11-09 10:46:36,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696333510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:36,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:36,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:36,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218685529] [2021-11-09 10:46:36,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:36,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:36,039 INFO L87 Difference]: Start difference. First operand 919 states and 1379 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:38,396 INFO L93 Difference]: Finished difference Result 1854 states and 2779 transitions. [2021-11-09 10:46:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-09 10:46:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:38,399 INFO L225 Difference]: With dead ends: 1854 [2021-11-09 10:46:38,399 INFO L226 Difference]: Without dead ends: 958 [2021-11-09 10:46:38,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-09 10:46:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 919. [2021-11-09 10:46:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.5) internal successors, (1377), 918 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1377 transitions. [2021-11-09 10:46:38,433 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1377 transitions. Word has length 199 [2021-11-09 10:46:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:38,433 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1377 transitions. [2021-11-09 10:46:38,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1377 transitions. [2021-11-09 10:46:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-09 10:46:38,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:38,436 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-09 10:46:38,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-11-09 10:46:38,436 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:38,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1767137811, now seen corresponding path program 1 times [2021-11-09 10:46:38,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:38,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836624419] [2021-11-09 10:46:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:38,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:38,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:38,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836624419] [2021-11-09 10:46:38,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836624419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:38,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:38,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:38,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108456707] [2021-11-09 10:46:38,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:38,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:38,530 INFO L87 Difference]: Start difference. First operand 919 states and 1377 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:40,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:40,895 INFO L93 Difference]: Finished difference Result 1850 states and 2771 transitions. [2021-11-09 10:46:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:40,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 200 [2021-11-09 10:46:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:40,897 INFO L225 Difference]: With dead ends: 1850 [2021-11-09 10:46:40,897 INFO L226 Difference]: Without dead ends: 954 [2021-11-09 10:46:40,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-09 10:46:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 919. [2021-11-09 10:46:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4978213507625273) internal successors, (1375), 918 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1375 transitions. [2021-11-09 10:46:40,920 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1375 transitions. Word has length 200 [2021-11-09 10:46:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:40,920 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1375 transitions. [2021-11-09 10:46:40,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1375 transitions. [2021-11-09 10:46:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 10:46:40,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:40,923 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-09 10:46:40,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-11-09 10:46:40,924 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 298170727, now seen corresponding path program 1 times [2021-11-09 10:46:40,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:40,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85833243] [2021-11-09 10:46:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:40,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:41,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:41,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85833243] [2021-11-09 10:46:41,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85833243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:41,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:41,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:41,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462763643] [2021-11-09 10:46:41,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:41,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:41,023 INFO L87 Difference]: Start difference. First operand 919 states and 1375 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:43,331 INFO L93 Difference]: Finished difference Result 1850 states and 2767 transitions. [2021-11-09 10:46:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 201 [2021-11-09 10:46:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:43,333 INFO L225 Difference]: With dead ends: 1850 [2021-11-09 10:46:43,334 INFO L226 Difference]: Without dead ends: 954 [2021-11-09 10:46:43,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-09 10:46:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 919. [2021-11-09 10:46:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4956427015250544) internal successors, (1373), 918 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2021-11-09 10:46:43,357 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 201 [2021-11-09 10:46:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:43,358 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2021-11-09 10:46:43,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2021-11-09 10:46:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-09 10:46:43,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:43,361 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-09 10:46:43,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-09 10:46:43,361 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash -712156120, now seen corresponding path program 1 times [2021-11-09 10:46:43,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:43,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945312114] [2021-11-09 10:46:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:43,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-09 10:46:43,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:43,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945312114] [2021-11-09 10:46:43,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945312114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:43,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:43,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:43,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605895607] [2021-11-09 10:46:43,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:43,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:43,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:43,461 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:45,804 INFO L93 Difference]: Finished difference Result 1846 states and 2759 transitions. [2021-11-09 10:46:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:45,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2021-11-09 10:46:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:45,808 INFO L225 Difference]: With dead ends: 1846 [2021-11-09 10:46:45,808 INFO L226 Difference]: Without dead ends: 950 [2021-11-09 10:46:45,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-09 10:46:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 919. [2021-11-09 10:46:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4934640522875817) internal successors, (1371), 918 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1371 transitions. [2021-11-09 10:46:45,842 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1371 transitions. Word has length 202 [2021-11-09 10:46:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:45,843 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1371 transitions. [2021-11-09 10:46:45,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1371 transitions. [2021-11-09 10:46:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-09 10:46:45,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:45,845 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:45,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-11-09 10:46:45,846 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1300086562, now seen corresponding path program 1 times [2021-11-09 10:46:45,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:45,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96518088] [2021-11-09 10:46:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:45,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-09 10:46:45,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:45,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96518088] [2021-11-09 10:46:45,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96518088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:45,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:45,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:45,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234470603] [2021-11-09 10:46:45,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:45,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:45,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:45,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:45,970 INFO L87 Difference]: Start difference. First operand 919 states and 1371 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:48,281 INFO L93 Difference]: Finished difference Result 1846 states and 2755 transitions. [2021-11-09 10:46:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 206 [2021-11-09 10:46:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:48,289 INFO L225 Difference]: With dead ends: 1846 [2021-11-09 10:46:48,289 INFO L226 Difference]: Without dead ends: 950 [2021-11-09 10:46:48,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-09 10:46:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 919. [2021-11-09 10:46:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.491285403050109) internal successors, (1369), 918 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1369 transitions. [2021-11-09 10:46:48,321 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1369 transitions. Word has length 206 [2021-11-09 10:46:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:48,322 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1369 transitions. [2021-11-09 10:46:48,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1369 transitions. [2021-11-09 10:46:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-09 10:46:48,324 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:48,324 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:48,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-11-09 10:46:48,324 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:48,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1269389027, now seen corresponding path program 1 times [2021-11-09 10:46:48,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:48,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748890565] [2021-11-09 10:46:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:48,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-09 10:46:48,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:48,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748890565] [2021-11-09 10:46:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748890565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:48,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:48,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:48,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699332740] [2021-11-09 10:46:48,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:48,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:48,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:48,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:48,412 INFO L87 Difference]: Start difference. First operand 919 states and 1369 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:50,750 INFO L93 Difference]: Finished difference Result 1846 states and 2751 transitions. [2021-11-09 10:46:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:50,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 207 [2021-11-09 10:46:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:50,756 INFO L225 Difference]: With dead ends: 1846 [2021-11-09 10:46:50,756 INFO L226 Difference]: Without dead ends: 950 [2021-11-09 10:46:50,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-09 10:46:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 919. [2021-11-09 10:46:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4891067538126361) internal successors, (1367), 918 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1367 transitions. [2021-11-09 10:46:50,786 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1367 transitions. Word has length 207 [2021-11-09 10:46:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:50,786 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1367 transitions. [2021-11-09 10:46:50,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1367 transitions. [2021-11-09 10:46:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 10:46:50,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:50,788 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:50,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-11-09 10:46:50,789 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 770034307, now seen corresponding path program 1 times [2021-11-09 10:46:50,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:50,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119239995] [2021-11-09 10:46:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:50,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-09 10:46:50,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:50,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119239995] [2021-11-09 10:46:50,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119239995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:50,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:50,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:50,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618534145] [2021-11-09 10:46:50,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:50,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:50,881 INFO L87 Difference]: Start difference. First operand 919 states and 1367 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:53,191 INFO L93 Difference]: Finished difference Result 1839 states and 2738 transitions. [2021-11-09 10:46:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-09 10:46:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:53,195 INFO L225 Difference]: With dead ends: 1839 [2021-11-09 10:46:53,195 INFO L226 Difference]: Without dead ends: 943 [2021-11-09 10:46:53,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-09 10:46:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 919. [2021-11-09 10:46:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4869281045751634) internal successors, (1365), 918 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1365 transitions. [2021-11-09 10:46:53,230 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1365 transitions. Word has length 208 [2021-11-09 10:46:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1365 transitions. [2021-11-09 10:46:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1365 transitions. [2021-11-09 10:46:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 10:46:53,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:53,233 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:53,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-11-09 10:46:53,234 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:53,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1829273074, now seen corresponding path program 1 times [2021-11-09 10:46:53,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:53,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699139016] [2021-11-09 10:46:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:53,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 10:46:53,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:53,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699139016] [2021-11-09 10:46:53,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699139016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:53,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:53,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:53,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441860481] [2021-11-09 10:46:53,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:53,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:53,326 INFO L87 Difference]: Start difference. First operand 919 states and 1365 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:55,641 INFO L93 Difference]: Finished difference Result 1839 states and 2734 transitions. [2021-11-09 10:46:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 208 [2021-11-09 10:46:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:55,643 INFO L225 Difference]: With dead ends: 1839 [2021-11-09 10:46:55,643 INFO L226 Difference]: Without dead ends: 943 [2021-11-09 10:46:55,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-09 10:46:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 919. [2021-11-09 10:46:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4847494553376905) internal successors, (1363), 918 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1363 transitions. [2021-11-09 10:46:55,666 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1363 transitions. Word has length 208 [2021-11-09 10:46:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1363 transitions. [2021-11-09 10:46:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1363 transitions. [2021-11-09 10:46:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-09 10:46:55,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:55,668 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 10:46:55,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-11-09 10:46:55,669 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1605566904, now seen corresponding path program 1 times [2021-11-09 10:46:55,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:55,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270524917] [2021-11-09 10:46:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:55,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-09 10:46:55,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:55,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270524917] [2021-11-09 10:46:55,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270524917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:55,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:55,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:55,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109888669] [2021-11-09 10:46:55,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:55,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:55,750 INFO L87 Difference]: Start difference. First operand 919 states and 1363 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:58,069 INFO L93 Difference]: Finished difference Result 1835 states and 2726 transitions. [2021-11-09 10:46:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 209 [2021-11-09 10:46:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:58,071 INFO L225 Difference]: With dead ends: 1835 [2021-11-09 10:46:58,071 INFO L226 Difference]: Without dead ends: 939 [2021-11-09 10:46:58,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-11-09 10:46:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 919. [2021-11-09 10:46:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4825708061002179) internal successors, (1361), 918 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1361 transitions. [2021-11-09 10:46:58,107 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1361 transitions. Word has length 209 [2021-11-09 10:46:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:58,107 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1361 transitions. [2021-11-09 10:46:58,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1361 transitions. [2021-11-09 10:46:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-09 10:46:58,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:58,110 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-09 10:46:58,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-11-09 10:46:58,111 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash -141593298, now seen corresponding path program 1 times [2021-11-09 10:46:58,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:58,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165155855] [2021-11-09 10:46:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:58,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-09 10:46:58,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:58,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165155855] [2021-11-09 10:46:58,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165155855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:58,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:58,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:58,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016688557] [2021-11-09 10:46:58,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:58,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:58,203 INFO L87 Difference]: Start difference. First operand 919 states and 1361 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:58,268 INFO L93 Difference]: Finished difference Result 2114 states and 3140 transitions. [2021-11-09 10:46:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 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 211 [2021-11-09 10:46:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:58,271 INFO L225 Difference]: With dead ends: 2114 [2021-11-09 10:46:58,271 INFO L226 Difference]: Without dead ends: 1218 [2021-11-09 10:46:58,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-11-09 10:46:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1218. [2021-11-09 10:46:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.4798685291700904) internal successors, (1801), 1217 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1801 transitions. [2021-11-09 10:46:58,324 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1801 transitions. Word has length 211 [2021-11-09 10:46:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1801 transitions. [2021-11-09 10:46:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1801 transitions. [2021-11-09 10:46:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-09 10:46:58,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:58,329 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:58,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-11-09 10:46:58,330 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1774719865, now seen corresponding path program 1 times [2021-11-09 10:46:58,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:58,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628553307] [2021-11-09 10:46:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:58,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-09 10:46:58,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:58,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628553307] [2021-11-09 10:46:58,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628553307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:58,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:58,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:58,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131491051] [2021-11-09 10:46:58,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:58,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:58,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:58,490 INFO L87 Difference]: Start difference. First operand 1218 states and 1801 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:01,092 INFO L93 Difference]: Finished difference Result 2818 states and 4187 transitions. [2021-11-09 10:47:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:01,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 254 [2021-11-09 10:47:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:01,097 INFO L225 Difference]: With dead ends: 2818 [2021-11-09 10:47:01,098 INFO L226 Difference]: Without dead ends: 1623 [2021-11-09 10:47:01,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-11-09 10:47:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1390. [2021-11-09 10:47:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 1.5241180705543556) internal successors, (2117), 1389 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2117 transitions. [2021-11-09 10:47:01,140 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2117 transitions. Word has length 254 [2021-11-09 10:47:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:01,140 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 2117 transitions. [2021-11-09 10:47:01,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2117 transitions. [2021-11-09 10:47:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-09 10:47:01,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:01,143 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:01,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-11-09 10:47:01,143 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash -930007364, now seen corresponding path program 1 times [2021-11-09 10:47:01,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:01,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715988635] [2021-11-09 10:47:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:01,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 318 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-09 10:47:01,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:01,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715988635] [2021-11-09 10:47:01,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715988635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:01,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:01,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:01,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794992636] [2021-11-09 10:47:01,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:01,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:01,291 INFO L87 Difference]: Start difference. First operand 1390 states and 2117 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:03,834 INFO L93 Difference]: Finished difference Result 2974 states and 4482 transitions. [2021-11-09 10:47:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2021-11-09 10:47:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:03,838 INFO L225 Difference]: With dead ends: 2974 [2021-11-09 10:47:03,838 INFO L226 Difference]: Without dead ends: 1599 [2021-11-09 10:47:03,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-09 10:47:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1386. [2021-11-09 10:47:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.5227436823104694) internal successors, (2109), 1385 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2109 transitions. [2021-11-09 10:47:03,889 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2109 transitions. Word has length 255 [2021-11-09 10:47:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:03,890 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2109 transitions. [2021-11-09 10:47:03,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2109 transitions. [2021-11-09 10:47:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-09 10:47:03,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:03,894 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:03,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-11-09 10:47:03,894 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:03,895 INFO L85 PathProgramCache]: Analyzing trace with hash 465080099, now seen corresponding path program 1 times [2021-11-09 10:47:03,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:03,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057661442] [2021-11-09 10:47:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:03,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 326 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-09 10:47:04,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:04,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057661442] [2021-11-09 10:47:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057661442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:04,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:04,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:04,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198347598] [2021-11-09 10:47:04,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:04,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:04,067 INFO L87 Difference]: Start difference. First operand 1386 states and 2109 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:06,665 INFO L93 Difference]: Finished difference Result 2962 states and 4462 transitions. [2021-11-09 10:47:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 270 [2021-11-09 10:47:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:06,669 INFO L225 Difference]: With dead ends: 2962 [2021-11-09 10:47:06,669 INFO L226 Difference]: Without dead ends: 1599 [2021-11-09 10:47:06,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-09 10:47:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1386. [2021-11-09 10:47:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.51985559566787) internal successors, (2105), 1385 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2105 transitions. [2021-11-09 10:47:06,712 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2105 transitions. Word has length 270 [2021-11-09 10:47:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:06,713 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2105 transitions. [2021-11-09 10:47:06,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2105 transitions. [2021-11-09 10:47:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-09 10:47:06,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:06,716 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:06,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-11-09 10:47:06,717 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1472371357, now seen corresponding path program 1 times [2021-11-09 10:47:06,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:06,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40025425] [2021-11-09 10:47:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:06,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-09 10:47:06,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:06,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40025425] [2021-11-09 10:47:06,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40025425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:06,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:06,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:06,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511531700] [2021-11-09 10:47:06,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:06,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:06,863 INFO L87 Difference]: Start difference. First operand 1386 states and 2105 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:09,401 INFO L93 Difference]: Finished difference Result 2962 states and 4454 transitions. [2021-11-09 10:47:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 271 [2021-11-09 10:47:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:09,407 INFO L225 Difference]: With dead ends: 2962 [2021-11-09 10:47:09,408 INFO L226 Difference]: Without dead ends: 1599 [2021-11-09 10:47:09,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-09 10:47:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1386. [2021-11-09 10:47:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.5169675090252708) internal successors, (2101), 1385 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2101 transitions. [2021-11-09 10:47:09,458 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2101 transitions. Word has length 271 [2021-11-09 10:47:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:09,458 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2101 transitions. [2021-11-09 10:47:09,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2101 transitions. [2021-11-09 10:47:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-09 10:47:09,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:09,462 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:09,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-11-09 10:47:09,462 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1717125032, now seen corresponding path program 1 times [2021-11-09 10:47:09,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:09,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024154511] [2021-11-09 10:47:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:09,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-09 10:47:09,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:09,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024154511] [2021-11-09 10:47:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024154511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:09,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:09,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:09,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736446050] [2021-11-09 10:47:09,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:09,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:09,605 INFO L87 Difference]: Start difference. First operand 1386 states and 2101 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:12,250 INFO L93 Difference]: Finished difference Result 2962 states and 4446 transitions. [2021-11-09 10:47:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:12,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 272 [2021-11-09 10:47:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:12,259 INFO L225 Difference]: With dead ends: 2962 [2021-11-09 10:47:12,260 INFO L226 Difference]: Without dead ends: 1599 [2021-11-09 10:47:12,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-09 10:47:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1386. [2021-11-09 10:47:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.5140794223826715) internal successors, (2097), 1385 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2097 transitions. [2021-11-09 10:47:12,328 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2097 transitions. Word has length 272 [2021-11-09 10:47:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:12,328 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2097 transitions. [2021-11-09 10:47:12,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2097 transitions. [2021-11-09 10:47:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-09 10:47:12,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:12,334 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:12,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-11-09 10:47:12,334 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash -201949886, now seen corresponding path program 1 times [2021-11-09 10:47:12,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:12,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225662073] [2021-11-09 10:47:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:12,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-09 10:47:12,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:12,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225662073] [2021-11-09 10:47:12,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225662073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:12,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:12,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:12,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484256460] [2021-11-09 10:47:12,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:12,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:12,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:12,517 INFO L87 Difference]: Start difference. First operand 1386 states and 2097 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:15,041 INFO L93 Difference]: Finished difference Result 2922 states and 4390 transitions. [2021-11-09 10:47:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-09 10:47:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:15,045 INFO L225 Difference]: With dead ends: 2922 [2021-11-09 10:47:15,045 INFO L226 Difference]: Without dead ends: 1559 [2021-11-09 10:47:15,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-11-09 10:47:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1386. [2021-11-09 10:47:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.5111913357400721) internal successors, (2093), 1385 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2093 transitions. [2021-11-09 10:47:15,121 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2093 transitions. Word has length 273 [2021-11-09 10:47:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2093 transitions. [2021-11-09 10:47:15,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2093 transitions. [2021-11-09 10:47:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-09 10:47:15,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:15,126 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:15,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-11-09 10:47:15,127 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1969308220, now seen corresponding path program 1 times [2021-11-09 10:47:15,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:15,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986413150] [2021-11-09 10:47:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 354 proven. 32 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-09 10:47:15,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:15,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986413150] [2021-11-09 10:47:15,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986413150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:15,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025759307] [2021-11-09 10:47:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:15,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:15,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:15,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:15,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:47:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:47:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:15,776 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:47:15,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:47:16,019 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:47:16,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-09 10:47:16,557 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:47:16,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:47:17,011 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:17,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:47:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 348 proven. 117 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 10:47:17,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025759307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:17,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:17,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-11-09 10:47:17,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801100352] [2021-11-09 10:47:17,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:47:17,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:47:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:47:17,183 INFO L87 Difference]: Start difference. First operand 1386 states and 2093 transitions. Second operand has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 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) [2021-11-09 10:47:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:27,093 INFO L93 Difference]: Finished difference Result 3448 states and 5217 transitions. [2021-11-09 10:47:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:47:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 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) Word has length 276 [2021-11-09 10:47:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:27,097 INFO L225 Difference]: With dead ends: 3448 [2021-11-09 10:47:27,098 INFO L226 Difference]: Without dead ends: 2085 [2021-11-09 10:47:27,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:47:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-11-09 10:47:27,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1618. [2021-11-09 10:47:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 1.5516388373531231) internal successors, (2509), 1617 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2509 transitions. [2021-11-09 10:47:27,176 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2509 transitions. Word has length 276 [2021-11-09 10:47:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:27,176 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 2509 transitions. [2021-11-09 10:47:27,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.454545454545453) internal successors, (236), 11 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) [2021-11-09 10:47:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2509 transitions. [2021-11-09 10:47:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-09 10:47:27,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:27,182 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:27,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:27,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:27,399 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -987314570, now seen corresponding path program 1 times [2021-11-09 10:47:27,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:27,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837959747] [2021-11-09 10:47:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:27,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-09 10:47:27,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:27,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837959747] [2021-11-09 10:47:27,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837959747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:27,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:27,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:27,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201585640] [2021-11-09 10:47:27,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:27,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:27,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:27,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:27,567 INFO L87 Difference]: Start difference. First operand 1618 states and 2509 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:30,069 INFO L93 Difference]: Finished difference Result 3478 states and 5392 transitions. [2021-11-09 10:47:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 281 [2021-11-09 10:47:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:30,073 INFO L225 Difference]: With dead ends: 3478 [2021-11-09 10:47:30,073 INFO L226 Difference]: Without dead ends: 1883 [2021-11-09 10:47:30,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-09 10:47:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1738. [2021-11-09 10:47:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 1.5641911341393206) internal successors, (2717), 1737 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2717 transitions. [2021-11-09 10:47:30,151 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2717 transitions. Word has length 281 [2021-11-09 10:47:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:30,152 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 2717 transitions. [2021-11-09 10:47:30,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2717 transitions. [2021-11-09 10:47:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-09 10:47:30,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:30,157 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:30,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-11-09 10:47:30,158 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:30,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1151923439, now seen corresponding path program 1 times [2021-11-09 10:47:30,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:30,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125819881] [2021-11-09 10:47:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:30,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-09 10:47:30,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:30,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125819881] [2021-11-09 10:47:30,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125819881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:30,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:30,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:30,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111079653] [2021-11-09 10:47:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:30,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:30,303 INFO L87 Difference]: Start difference. First operand 1738 states and 2717 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:32,866 INFO L93 Difference]: Finished difference Result 3626 states and 5630 transitions. [2021-11-09 10:47:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 285 [2021-11-09 10:47:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:32,868 INFO L225 Difference]: With dead ends: 3626 [2021-11-09 10:47:32,868 INFO L226 Difference]: Without dead ends: 1911 [2021-11-09 10:47:32,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-11-09 10:47:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1738. [2021-11-09 10:47:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 1.56188831318365) internal successors, (2713), 1737 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2713 transitions. [2021-11-09 10:47:32,916 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2713 transitions. Word has length 285 [2021-11-09 10:47:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:32,917 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 2713 transitions. [2021-11-09 10:47:32,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2713 transitions. [2021-11-09 10:47:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-09 10:47:32,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:32,922 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:32,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-11-09 10:47:32,923 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1083268625, now seen corresponding path program 1 times [2021-11-09 10:47:32,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:32,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741961157] [2021-11-09 10:47:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:32,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-09 10:47:33,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:33,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741961157] [2021-11-09 10:47:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741961157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:33,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:33,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:33,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103815616] [2021-11-09 10:47:33,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:33,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:33,068 INFO L87 Difference]: Start difference. First operand 1738 states and 2713 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:35,539 INFO L93 Difference]: Finished difference Result 3702 states and 5776 transitions. [2021-11-09 10:47:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-11-09 10:47:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:35,542 INFO L225 Difference]: With dead ends: 3702 [2021-11-09 10:47:35,543 INFO L226 Difference]: Without dead ends: 1987 [2021-11-09 10:47:35,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-11-09 10:47:35,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1850. [2021-11-09 10:47:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 1.5711195240670632) internal successors, (2905), 1849 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2905 transitions. [2021-11-09 10:47:35,630 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2905 transitions. Word has length 285 [2021-11-09 10:47:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:35,631 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2905 transitions. [2021-11-09 10:47:35,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2905 transitions. [2021-11-09 10:47:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-09 10:47:35,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:35,635 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:35,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-11-09 10:47:35,636 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:35,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1192236868, now seen corresponding path program 1 times [2021-11-09 10:47:35,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:35,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172072062] [2021-11-09 10:47:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:35,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-09 10:47:35,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:35,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172072062] [2021-11-09 10:47:35,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172072062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:35,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:35,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:35,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483024987] [2021-11-09 10:47:35,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:35,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:35,793 INFO L87 Difference]: Start difference. First operand 1850 states and 2905 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:38,359 INFO L93 Difference]: Finished difference Result 3834 states and 5986 transitions. [2021-11-09 10:47:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2021-11-09 10:47:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:38,362 INFO L225 Difference]: With dead ends: 3834 [2021-11-09 10:47:38,363 INFO L226 Difference]: Without dead ends: 2007 [2021-11-09 10:47:38,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-11-09 10:47:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1850. [2021-11-09 10:47:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 1.5689561925365063) internal successors, (2901), 1849 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2901 transitions. [2021-11-09 10:47:38,433 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2901 transitions. Word has length 285 [2021-11-09 10:47:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:38,434 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2901 transitions. [2021-11-09 10:47:38,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2901 transitions. [2021-11-09 10:47:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-09 10:47:38,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:38,440 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:38,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-11-09 10:47:38,440 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -650238846, now seen corresponding path program 1 times [2021-11-09 10:47:38,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:38,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495192375] [2021-11-09 10:47:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:38,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 444 proven. 81 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-09 10:47:38,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:38,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495192375] [2021-11-09 10:47:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495192375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:38,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115754303] [2021-11-09 10:47:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:38,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:38,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:38,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:47:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:47:39,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:39,166 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:47:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:47:39,361 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:39,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:47:39,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 10:47:39,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 10:47:39,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:47:39,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:47:39,847 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:47:39,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:47:40,141 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:40,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:47:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 436 proven. 87 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-09 10:47:40,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115754303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:40,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:40,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-09 10:47:40,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109777581] [2021-11-09 10:47:40,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:47:40,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:40,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:47:40,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:47:40,376 INFO L87 Difference]: Start difference. First operand 1850 states and 2901 transitions. Second operand has 11 states, 11 states have (on average 21.818181818181817) internal successors, (240), 11 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:46,038 INFO L93 Difference]: Finished difference Result 4180 states and 6504 transitions. [2021-11-09 10:47:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:47:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.818181818181817) internal successors, (240), 11 states have internal predecessors, (240), 0 states have call successors, (0), 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 285 [2021-11-09 10:47:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:46,043 INFO L225 Difference]: With dead ends: 4180 [2021-11-09 10:47:46,043 INFO L226 Difference]: Without dead ends: 2353 [2021-11-09 10:47:46,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 280 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:47:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-11-09 10:47:46,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1978. [2021-11-09 10:47:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5786545270612038) internal successors, (3121), 1977 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3121 transitions. [2021-11-09 10:47:46,122 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3121 transitions. Word has length 285 [2021-11-09 10:47:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:46,123 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3121 transitions. [2021-11-09 10:47:46,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.818181818181817) internal successors, (240), 11 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3121 transitions. [2021-11-09 10:47:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-09 10:47:46,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:46,127 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:46,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:46,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-11-09 10:47:46,331 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:46,332 INFO L85 PathProgramCache]: Analyzing trace with hash -631893741, now seen corresponding path program 1 times [2021-11-09 10:47:46,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:46,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112054380] [2021-11-09 10:47:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:46,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-09 10:47:46,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:46,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112054380] [2021-11-09 10:47:46,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112054380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:46,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:46,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:46,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754712035] [2021-11-09 10:47:46,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:46,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:46,458 INFO L87 Difference]: Start difference. First operand 1978 states and 3121 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:49,029 INFO L93 Difference]: Finished difference Result 4090 states and 6418 transitions. [2021-11-09 10:47:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:49,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 286 [2021-11-09 10:47:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:49,032 INFO L225 Difference]: With dead ends: 4090 [2021-11-09 10:47:49,032 INFO L226 Difference]: Without dead ends: 2135 [2021-11-09 10:47:49,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-09 10:47:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1978. [2021-11-09 10:47:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5766312594840668) internal successors, (3117), 1977 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3117 transitions. [2021-11-09 10:47:49,083 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3117 transitions. Word has length 286 [2021-11-09 10:47:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:49,083 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3117 transitions. [2021-11-09 10:47:49,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3117 transitions. [2021-11-09 10:47:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-09 10:47:49,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:49,087 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:49,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-11-09 10:47:49,087 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:49,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1701292811, now seen corresponding path program 1 times [2021-11-09 10:47:49,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:49,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659477384] [2021-11-09 10:47:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:49,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-09 10:47:49,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:49,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659477384] [2021-11-09 10:47:49,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659477384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:49,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:47:49,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:47:49,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096532063] [2021-11-09 10:47:49,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:47:49,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:47:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:47:49,236 INFO L87 Difference]: Start difference. First operand 1978 states and 3117 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 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) [2021-11-09 10:47:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:51,710 INFO L93 Difference]: Finished difference Result 4082 states and 6402 transitions. [2021-11-09 10:47:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:47:51,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 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) Word has length 286 [2021-11-09 10:47:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:51,713 INFO L225 Difference]: With dead ends: 4082 [2021-11-09 10:47:51,713 INFO L226 Difference]: Without dead ends: 2127 [2021-11-09 10:47:51,715 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:47:51,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-09 10:47:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1978. [2021-11-09 10:47:51,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5746079919069298) internal successors, (3113), 1977 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3113 transitions. [2021-11-09 10:47:51,782 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3113 transitions. Word has length 286 [2021-11-09 10:47:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:51,782 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3113 transitions. [2021-11-09 10:47:51,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 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) [2021-11-09 10:47:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3113 transitions. [2021-11-09 10:47:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-09 10:47:51,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:51,786 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:47:51,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-11-09 10:47:51,786 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1914066027, now seen corresponding path program 1 times [2021-11-09 10:47:51,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:51,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809200664] [2021-11-09 10:47:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:51,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 428 proven. 69 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-09 10:47:51,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:51,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809200664] [2021-11-09 10:47:51,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809200664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:51,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709837424] [2021-11-09 10:47:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:51,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:51,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:51,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:51,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:47:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:47:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:52,575 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:47:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:47:52,738 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:47:52,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 10:47:52,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 10:47:53,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:47:53,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:47:53,128 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:47:53,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:47:53,319 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:47:53,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:47:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 416 proven. 95 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-09 10:47:53,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709837424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:53,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:53,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-09 10:47:53,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672089290] [2021-11-09 10:47:53,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:47:53,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:47:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:47:53,523 INFO L87 Difference]: Start difference. First operand 1978 states and 3113 transitions. Second operand has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:01,101 INFO L93 Difference]: Finished difference Result 4300 states and 6692 transitions. [2021-11-09 10:48:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:48:01,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 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 286 [2021-11-09 10:48:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:01,105 INFO L225 Difference]: With dead ends: 4300 [2021-11-09 10:48:01,105 INFO L226 Difference]: Without dead ends: 2345 [2021-11-09 10:48:01,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 281 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:48:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-11-09 10:48:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1978. [2021-11-09 10:48:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5644916540212443) internal successors, (3093), 1977 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3093 transitions. [2021-11-09 10:48:01,235 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3093 transitions. Word has length 286 [2021-11-09 10:48:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:01,236 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3093 transitions. [2021-11-09 10:48:01,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3093 transitions. [2021-11-09 10:48:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-09 10:48:01,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:01,241 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:01,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:01,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:01,442 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1895353741, now seen corresponding path program 1 times [2021-11-09 10:48:01,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:01,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112071099] [2021-11-09 10:48:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:01,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-09 10:48:01,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:01,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112071099] [2021-11-09 10:48:01,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112071099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:01,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:01,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:01,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349607411] [2021-11-09 10:48:01,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:01,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:01,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:01,639 INFO L87 Difference]: Start difference. First operand 1978 states and 3093 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:04,096 INFO L93 Difference]: Finished difference Result 4050 states and 6302 transitions. [2021-11-09 10:48:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-11-09 10:48:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:04,100 INFO L225 Difference]: With dead ends: 4050 [2021-11-09 10:48:04,100 INFO L226 Difference]: Without dead ends: 2095 [2021-11-09 10:48:04,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-09 10:48:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1978. [2021-11-09 10:48:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.5624683864441071) internal successors, (3089), 1977 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3089 transitions. [2021-11-09 10:48:04,181 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3089 transitions. Word has length 287 [2021-11-09 10:48:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:04,181 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 3089 transitions. [2021-11-09 10:48:04,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3089 transitions. [2021-11-09 10:48:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-09 10:48:04,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:04,204 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:04,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-11-09 10:48:04,204 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1679746926, now seen corresponding path program 1 times [2021-11-09 10:48:04,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:04,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407814828] [2021-11-09 10:48:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:04,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-09 10:48:04,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:04,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407814828] [2021-11-09 10:48:04,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407814828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:04,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:04,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:04,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715378589] [2021-11-09 10:48:04,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:04,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:04,308 INFO L87 Difference]: Start difference. First operand 1978 states and 3089 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:06,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:06,655 INFO L93 Difference]: Finished difference Result 4082 states and 6370 transitions. [2021-11-09 10:48:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:06,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 287 [2021-11-09 10:48:06,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:06,659 INFO L225 Difference]: With dead ends: 4082 [2021-11-09 10:48:06,660 INFO L226 Difference]: Without dead ends: 2127 [2021-11-09 10:48:06,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-09 10:48:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2062. [2021-11-09 10:48:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 1.566715186802523) internal successors, (3229), 2061 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3229 transitions. [2021-11-09 10:48:06,761 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3229 transitions. Word has length 287 [2021-11-09 10:48:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:06,762 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 3229 transitions. [2021-11-09 10:48:06,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3229 transitions. [2021-11-09 10:48:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-09 10:48:06,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:06,766 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:06,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-11-09 10:48:06,766 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash 802718539, now seen corresponding path program 1 times [2021-11-09 10:48:06,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:06,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74294408] [2021-11-09 10:48:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:06,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 432 proven. 72 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-09 10:48:06,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:06,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74294408] [2021-11-09 10:48:06,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74294408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:06,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833683939] [2021-11-09 10:48:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:06,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:06,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:06,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:06,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:48:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:07,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:48:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:07,748 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:48:07,943 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:48:08,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 10:48:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 10:48:08,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:48:08,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:48:08,366 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:08,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:48:08,575 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:48:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 421 proven. 93 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-09 10:48:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833683939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:08,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:08,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-09 10:48:08,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580744668] [2021-11-09 10:48:08,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:48:08,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:48:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:48:08,817 INFO L87 Difference]: Start difference. First operand 2062 states and 3229 transitions. Second operand has 11 states, 11 states have (on average 21.545454545454547) internal successors, (237), 11 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:15,694 INFO L93 Difference]: Finished difference Result 4436 states and 6872 transitions. [2021-11-09 10:48:15,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:48:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.545454545454547) internal successors, (237), 11 states have internal predecessors, (237), 0 states have call successors, (0), 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 287 [2021-11-09 10:48:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:15,697 INFO L225 Difference]: With dead ends: 4436 [2021-11-09 10:48:15,697 INFO L226 Difference]: Without dead ends: 2397 [2021-11-09 10:48:15,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 282 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:48:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-11-09 10:48:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2062. [2021-11-09 10:48:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 1.557011159631247) internal successors, (3209), 2061 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3209 transitions. [2021-11-09 10:48:15,761 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3209 transitions. Word has length 287 [2021-11-09 10:48:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:15,761 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 3209 transitions. [2021-11-09 10:48:15,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.545454545454547) internal successors, (237), 11 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3209 transitions. [2021-11-09 10:48:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-09 10:48:15,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:15,765 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:15,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:15,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-11-09 10:48:15,991 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -172168788, now seen corresponding path program 1 times [2021-11-09 10:48:15,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:15,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512845316] [2021-11-09 10:48:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:15,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-09 10:48:16,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:16,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512845316] [2021-11-09 10:48:16,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512845316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:16,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:16,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:16,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865296024] [2021-11-09 10:48:16,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:16,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:16,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:16,132 INFO L87 Difference]: Start difference. First operand 2062 states and 3209 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:18,523 INFO L93 Difference]: Finished difference Result 4394 states and 6820 transitions. [2021-11-09 10:48:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:18,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 288 [2021-11-09 10:48:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:18,526 INFO L225 Difference]: With dead ends: 4394 [2021-11-09 10:48:18,526 INFO L226 Difference]: Without dead ends: 2355 [2021-11-09 10:48:18,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:18,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-11-09 10:48:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2210. [2021-11-09 10:48:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 1.5667722951561793) internal successors, (3461), 2209 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 3461 transitions. [2021-11-09 10:48:18,579 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 3461 transitions. Word has length 288 [2021-11-09 10:48:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 2210 states and 3461 transitions. [2021-11-09 10:48:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 3461 transitions. [2021-11-09 10:48:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-09 10:48:18,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:18,582 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:18,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-11-09 10:48:18,582 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash 93030380, now seen corresponding path program 1 times [2021-11-09 10:48:18,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:18,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175532354] [2021-11-09 10:48:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:18,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2021-11-09 10:48:18,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:18,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175532354] [2021-11-09 10:48:18,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175532354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:18,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:18,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:18,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754280525] [2021-11-09 10:48:18,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:18,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:18,683 INFO L87 Difference]: Start difference. First operand 2210 states and 3461 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:21,183 INFO L93 Difference]: Finished difference Result 4674 states and 7300 transitions. [2021-11-09 10:48:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 288 [2021-11-09 10:48:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:21,187 INFO L225 Difference]: With dead ends: 4674 [2021-11-09 10:48:21,187 INFO L226 Difference]: Without dead ends: 2487 [2021-11-09 10:48:21,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-11-09 10:48:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2350. [2021-11-09 10:48:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 1.5738612175393785) internal successors, (3697), 2349 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3697 transitions. [2021-11-09 10:48:21,263 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3697 transitions. Word has length 288 [2021-11-09 10:48:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:21,263 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3697 transitions. [2021-11-09 10:48:21,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:21,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3697 transitions. [2021-11-09 10:48:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-09 10:48:21,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:21,286 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:21,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-11-09 10:48:21,286 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1665999623, now seen corresponding path program 1 times [2021-11-09 10:48:21,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:21,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419324711] [2021-11-09 10:48:21,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:21,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 10:48:21,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:21,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419324711] [2021-11-09 10:48:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419324711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:21,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:21,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666866461] [2021-11-09 10:48:21,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:21,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:21,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:21,424 INFO L87 Difference]: Start difference. First operand 2350 states and 3697 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:23,953 INFO L93 Difference]: Finished difference Result 4994 states and 7834 transitions. [2021-11-09 10:48:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:23,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 290 [2021-11-09 10:48:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:23,957 INFO L225 Difference]: With dead ends: 4994 [2021-11-09 10:48:23,957 INFO L226 Difference]: Without dead ends: 2667 [2021-11-09 10:48:23,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-11-09 10:48:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2506. [2021-11-09 10:48:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.5828343313373254) internal successors, (3965), 2505 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3965 transitions. [2021-11-09 10:48:24,058 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3965 transitions. Word has length 290 [2021-11-09 10:48:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:24,058 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3965 transitions. [2021-11-09 10:48:24,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3965 transitions. [2021-11-09 10:48:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-09 10:48:24,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:24,062 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:24,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-11-09 10:48:24,062 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash 656602204, now seen corresponding path program 1 times [2021-11-09 10:48:24,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:24,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121679488] [2021-11-09 10:48:24,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:24,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-09 10:48:24,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:24,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121679488] [2021-11-09 10:48:24,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121679488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:24,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:24,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:24,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166784722] [2021-11-09 10:48:24,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:24,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:24,197 INFO L87 Difference]: Start difference. First operand 2506 states and 3965 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:26,724 INFO L93 Difference]: Finished difference Result 5106 states and 8046 transitions. [2021-11-09 10:48:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2021-11-09 10:48:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:26,728 INFO L225 Difference]: With dead ends: 5106 [2021-11-09 10:48:26,728 INFO L226 Difference]: Without dead ends: 2623 [2021-11-09 10:48:26,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2021-11-09 10:48:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2506. [2021-11-09 10:48:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.5812375249500998) internal successors, (3961), 2505 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3961 transitions. [2021-11-09 10:48:26,793 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3961 transitions. Word has length 294 [2021-11-09 10:48:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:26,793 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3961 transitions. [2021-11-09 10:48:26,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3961 transitions. [2021-11-09 10:48:26,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-09 10:48:26,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:26,797 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:26,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-11-09 10:48:26,797 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash 222096606, now seen corresponding path program 1 times [2021-11-09 10:48:26,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:26,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164936528] [2021-11-09 10:48:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:26,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 451 proven. 57 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-09 10:48:26,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:26,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164936528] [2021-11-09 10:48:26,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164936528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:26,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770596839] [2021-11-09 10:48:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:26,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:26,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:26,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:26,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:48:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:48:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:27,761 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:27,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:48:27,917 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:27,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:48:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 10:48:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 10:48:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:48:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:48:28,341 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:28,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:48:28,504 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:28,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:48:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 435 proven. 103 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-09 10:48:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770596839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:28,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:28,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-09 10:48:28,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003238883] [2021-11-09 10:48:28,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:48:28,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:48:28,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:48:28,771 INFO L87 Difference]: Start difference. First operand 2506 states and 3961 transitions. Second operand has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:36,154 INFO L93 Difference]: Finished difference Result 5236 states and 8196 transitions. [2021-11-09 10:48:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:48:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 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 294 [2021-11-09 10:48:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:36,157 INFO L225 Difference]: With dead ends: 5236 [2021-11-09 10:48:36,158 INFO L226 Difference]: Without dead ends: 2753 [2021-11-09 10:48:36,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 289 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:48:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-11-09 10:48:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2506. [2021-11-09 10:48:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.5652694610778444) internal successors, (3921), 2505 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3921 transitions. [2021-11-09 10:48:36,245 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3921 transitions. Word has length 294 [2021-11-09 10:48:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:36,246 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3921 transitions. [2021-11-09 10:48:36,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.181818181818183) internal successors, (233), 11 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3921 transitions. [2021-11-09 10:48:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-09 10:48:36,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:36,249 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:36,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:36,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:36,450 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1860489834, now seen corresponding path program 1 times [2021-11-09 10:48:36,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:36,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595209895] [2021-11-09 10:48:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:36,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 447 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-11-09 10:48:36,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:36,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595209895] [2021-11-09 10:48:36,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595209895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:36,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:36,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50572318] [2021-11-09 10:48:36,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:36,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:36,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:36,553 INFO L87 Difference]: Start difference. First operand 2506 states and 3921 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:39,048 INFO L93 Difference]: Finished difference Result 5090 states and 7938 transitions. [2021-11-09 10:48:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 295 [2021-11-09 10:48:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:39,051 INFO L225 Difference]: With dead ends: 5090 [2021-11-09 10:48:39,051 INFO L226 Difference]: Without dead ends: 2607 [2021-11-09 10:48:39,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-11-09 10:48:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2506. [2021-11-09 10:48:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.5636726546906188) internal successors, (3917), 2505 states have internal predecessors, (3917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3917 transitions. [2021-11-09 10:48:39,120 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3917 transitions. Word has length 295 [2021-11-09 10:48:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:39,120 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3917 transitions. [2021-11-09 10:48:39,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3917 transitions. [2021-11-09 10:48:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-09 10:48:39,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:39,123 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 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] [2021-11-09 10:48:39,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-11-09 10:48:39,124 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1849705812, now seen corresponding path program 1 times [2021-11-09 10:48:39,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:39,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198901545] [2021-11-09 10:48:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:39,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 455 proven. 60 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-09 10:48:39,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:39,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198901545] [2021-11-09 10:48:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198901545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:39,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82395434] [2021-11-09 10:48:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:39,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:39,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:39,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:48:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:48:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:40,035 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:48:40,162 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:40,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:48:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 10:48:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 10:48:40,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:48:40,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:48:40,494 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:48:40,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:48:40,669 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:48:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:48:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 440 proven. 101 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-11-09 10:48:40,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82395434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:40,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:40,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-09 10:48:40,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886535931] [2021-11-09 10:48:40,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:48:40,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:48:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:48:40,909 INFO L87 Difference]: Start difference. First operand 2506 states and 3917 transitions. Second operand has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:50,177 INFO L93 Difference]: Finished difference Result 5220 states and 8088 transitions. [2021-11-09 10:48:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:48:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 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 295 [2021-11-09 10:48:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:50,182 INFO L225 Difference]: With dead ends: 5220 [2021-11-09 10:48:50,182 INFO L226 Difference]: Without dead ends: 2737 [2021-11-09 10:48:50,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:48:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-11-09 10:48:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2506. [2021-11-09 10:48:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.5477045908183633) internal successors, (3877), 2505 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3877 transitions. [2021-11-09 10:48:50,256 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3877 transitions. Word has length 295 [2021-11-09 10:48:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:50,256 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3877 transitions. [2021-11-09 10:48:50,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.363636363636363) internal successors, (235), 11 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3877 transitions. [2021-11-09 10:48:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-09 10:48:50,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:50,261 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 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] [2021-11-09 10:48:50,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:50,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:50,479 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:50,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1343161792, now seen corresponding path program 1 times [2021-11-09 10:48:50,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:50,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845314765] [2021-11-09 10:48:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:50,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-09 10:48:50,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:50,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845314765] [2021-11-09 10:48:50,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845314765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:50,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:50,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:48:50,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611868807] [2021-11-09 10:48:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:48:50,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:48:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:48:50,628 INFO L87 Difference]: Start difference. First operand 2506 states and 3877 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:53,075 INFO L93 Difference]: Finished difference Result 5090 states and 7850 transitions. [2021-11-09 10:48:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:48:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 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 296 [2021-11-09 10:48:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:53,078 INFO L225 Difference]: With dead ends: 5090 [2021-11-09 10:48:53,079 INFO L226 Difference]: Without dead ends: 2607 [2021-11-09 10:48:53,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:48:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-11-09 10:48:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2506. [2021-11-09 10:48:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 1.5461077844311377) internal successors, (3873), 2505 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 3873 transitions. [2021-11-09 10:48:53,223 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 3873 transitions. Word has length 296 [2021-11-09 10:48:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:53,223 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 3873 transitions. [2021-11-09 10:48:53,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 3873 transitions. [2021-11-09 10:48:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-09 10:48:53,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:53,227 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 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] [2021-11-09 10:48:53,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-11-09 10:48:53,227 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2003753538, now seen corresponding path program 1 times [2021-11-09 10:48:53,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:53,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409802689] [2021-11-09 10:48:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:53,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-09 10:48:53,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:53,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409802689] [2021-11-09 10:48:53,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409802689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:53,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:48:53,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:48:53,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099864616] [2021-11-09 10:48:53,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:48:53,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:53,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:48:53,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:48:53,614 INFO L87 Difference]: Start difference. First operand 2506 states and 3873 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:01,500 INFO L93 Difference]: Finished difference Result 6766 states and 10319 transitions. [2021-11-09 10:49:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:49:01,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 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 296 [2021-11-09 10:49:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:01,505 INFO L225 Difference]: With dead ends: 6766 [2021-11-09 10:49:01,505 INFO L226 Difference]: Without dead ends: 4283 [2021-11-09 10:49:01,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:49:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-11-09 10:49:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2605. [2021-11-09 10:49:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 1.5495391705069124) internal successors, (4035), 2604 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 4035 transitions. [2021-11-09 10:49:01,621 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 4035 transitions. Word has length 296 [2021-11-09 10:49:01,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:01,622 INFO L470 AbstractCegarLoop]: Abstraction has 2605 states and 4035 transitions. [2021-11-09 10:49:01,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 4035 transitions. [2021-11-09 10:49:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-09 10:49:01,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:01,625 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 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] [2021-11-09 10:49:01,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-11-09 10:49:01,625 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1397727420, now seen corresponding path program 1 times [2021-11-09 10:49:01,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:01,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208106320] [2021-11-09 10:49:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:01,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-11-09 10:49:01,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:01,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208106320] [2021-11-09 10:49:01,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208106320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:01,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:01,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:49:01,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991089780] [2021-11-09 10:49:01,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:49:01,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:49:01,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:01,950 INFO L87 Difference]: Start difference. First operand 2605 states and 4035 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:09,710 INFO L93 Difference]: Finished difference Result 7153 states and 10965 transitions. [2021-11-09 10:49:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:49:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 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 296 [2021-11-09 10:49:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:09,715 INFO L225 Difference]: With dead ends: 7153 [2021-11-09 10:49:09,715 INFO L226 Difference]: Without dead ends: 4565 [2021-11-09 10:49:09,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:49:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2021-11-09 10:49:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 2728. [2021-11-09 10:49:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 1.5577557755775577) internal successors, (4248), 2727 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 4248 transitions. [2021-11-09 10:49:09,860 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 4248 transitions. Word has length 296 [2021-11-09 10:49:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:09,861 INFO L470 AbstractCegarLoop]: Abstraction has 2728 states and 4248 transitions. [2021-11-09 10:49:09,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 4248 transitions. [2021-11-09 10:49:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-09 10:49:09,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:09,869 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 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] [2021-11-09 10:49:09,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-11-09 10:49:09,869 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:09,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1008022050, now seen corresponding path program 1 times [2021-11-09 10:49:09,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:09,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106161617] [2021-11-09 10:49:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:09,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-11-09 10:49:10,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106161617] [2021-11-09 10:49:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106161617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:10,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:10,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:49:10,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778289845] [2021-11-09 10:49:10,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:49:10,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:49:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:10,174 INFO L87 Difference]: Start difference. First operand 2728 states and 4248 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:12,750 INFO L93 Difference]: Finished difference Result 5719 states and 8851 transitions. [2021-11-09 10:49:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 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 312 [2021-11-09 10:49:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:12,753 INFO L225 Difference]: With dead ends: 5719 [2021-11-09 10:49:12,753 INFO L226 Difference]: Without dead ends: 3006 [2021-11-09 10:49:12,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:49:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-11-09 10:49:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2606. [2021-11-09 10:49:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.5500959692898273) internal successors, (4038), 2605 states have internal predecessors, (4038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 4038 transitions. [2021-11-09 10:49:12,852 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 4038 transitions. Word has length 312 [2021-11-09 10:49:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:12,852 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 4038 transitions. [2021-11-09 10:49:12,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 4038 transitions. [2021-11-09 10:49:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-09 10:49:12,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:12,856 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:49:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-11-09 10:49:12,856 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1517469961, now seen corresponding path program 1 times [2021-11-09 10:49:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:12,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055885664] [2021-11-09 10:49:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:12,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-09 10:49:13,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:13,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055885664] [2021-11-09 10:49:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055885664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:13,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:13,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:49:13,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23283940] [2021-11-09 10:49:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:49:13,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:49:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:13,279 INFO L87 Difference]: Start difference. First operand 2606 states and 4038 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:20,765 INFO L93 Difference]: Finished difference Result 7388 states and 11462 transitions. [2021-11-09 10:49:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:49:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 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 325 [2021-11-09 10:49:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:20,771 INFO L225 Difference]: With dead ends: 7388 [2021-11-09 10:49:20,771 INFO L226 Difference]: Without dead ends: 4805 [2021-11-09 10:49:20,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:49:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4805 states. [2021-11-09 10:49:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4805 to 4590. [2021-11-09 10:49:20,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 1.5650468511658313) internal successors, (7182), 4589 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 7182 transitions. [2021-11-09 10:49:20,959 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 7182 transitions. Word has length 325 [2021-11-09 10:49:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:20,959 INFO L470 AbstractCegarLoop]: Abstraction has 4590 states and 7182 transitions. [2021-11-09 10:49:20,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 7182 transitions. [2021-11-09 10:49:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-09 10:49:20,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:20,964 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:49:20,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-11-09 10:49:20,964 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash -207372277, now seen corresponding path program 1 times [2021-11-09 10:49:20,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:20,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103839631] [2021-11-09 10:49:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:20,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-09 10:49:21,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:21,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103839631] [2021-11-09 10:49:21,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103839631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:21,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:21,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:49:21,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241471088] [2021-11-09 10:49:21,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:49:21,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:49:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:21,264 INFO L87 Difference]: Start difference. First operand 4590 states and 7182 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:27,277 INFO L93 Difference]: Finished difference Result 11406 states and 17608 transitions. [2021-11-09 10:49:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:49:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 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 325 [2021-11-09 10:49:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:27,289 INFO L225 Difference]: With dead ends: 11406 [2021-11-09 10:49:27,289 INFO L226 Difference]: Without dead ends: 6839 [2021-11-09 10:49:27,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:49:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2021-11-09 10:49:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 4707. [2021-11-09 10:49:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4706 states have (on average 1.5665108372290693) internal successors, (7372), 4706 states have internal predecessors, (7372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 7372 transitions. [2021-11-09 10:49:27,474 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 7372 transitions. Word has length 325 [2021-11-09 10:49:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:27,475 INFO L470 AbstractCegarLoop]: Abstraction has 4707 states and 7372 transitions. [2021-11-09 10:49:27,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 7372 transitions. [2021-11-09 10:49:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-09 10:49:27,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:27,480 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 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] [2021-11-09 10:49:27,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-11-09 10:49:27,480 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1066276522, now seen corresponding path program 1 times [2021-11-09 10:49:27,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:27,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134987658] [2021-11-09 10:49:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:27,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-09 10:49:27,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:27,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134987658] [2021-11-09 10:49:27,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134987658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:27,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:27,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:49:27,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018552005] [2021-11-09 10:49:27,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:27,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:27,654 INFO L87 Difference]: Start difference. First operand 4707 states and 7372 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:30,298 INFO L93 Difference]: Finished difference Result 9589 states and 14955 transitions. [2021-11-09 10:49:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:30,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 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 326 [2021-11-09 10:49:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:30,302 INFO L225 Difference]: With dead ends: 9589 [2021-11-09 10:49:30,302 INFO L226 Difference]: Without dead ends: 4897 [2021-11-09 10:49:30,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4897 states. [2021-11-09 10:49:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4897 to 4703. [2021-11-09 10:49:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 1.5652913653764355) internal successors, (7360), 4702 states have internal predecessors, (7360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 7360 transitions. [2021-11-09 10:49:30,463 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 7360 transitions. Word has length 326 [2021-11-09 10:49:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:30,464 INFO L470 AbstractCegarLoop]: Abstraction has 4703 states and 7360 transitions. [2021-11-09 10:49:30,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 7360 transitions. [2021-11-09 10:49:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-09 10:49:30,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:30,471 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 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] [2021-11-09 10:49:30,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-11-09 10:49:30,472 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2057166402, now seen corresponding path program 1 times [2021-11-09 10:49:30,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:30,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367001606] [2021-11-09 10:49:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:30,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-09 10:49:30,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:30,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367001606] [2021-11-09 10:49:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367001606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:30,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:30,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:49:30,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506605247] [2021-11-09 10:49:30,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:49:30,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:49:30,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:49:30,789 INFO L87 Difference]: Start difference. First operand 4703 states and 7360 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:36,526 INFO L93 Difference]: Finished difference Result 10510 states and 16269 transitions. [2021-11-09 10:49:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:49:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 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 326 [2021-11-09 10:49:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:36,533 INFO L225 Difference]: With dead ends: 10510 [2021-11-09 10:49:36,534 INFO L226 Difference]: Without dead ends: 5814 [2021-11-09 10:49:36,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:49:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2021-11-09 10:49:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 4690. [2021-11-09 10:49:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4689 states have (on average 1.5651524845382812) internal successors, (7339), 4689 states have internal predecessors, (7339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 7339 transitions. [2021-11-09 10:49:36,768 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 7339 transitions. Word has length 326 [2021-11-09 10:49:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:36,768 INFO L470 AbstractCegarLoop]: Abstraction has 4690 states and 7339 transitions. [2021-11-09 10:49:36,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 7339 transitions. [2021-11-09 10:49:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-09 10:49:36,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:36,778 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:49:36,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-11-09 10:49:36,779 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:36,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -537896795, now seen corresponding path program 1 times [2021-11-09 10:49:36,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:36,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824873448] [2021-11-09 10:49:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:36,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 656 proven. 60 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-09 10:49:37,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:37,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824873448] [2021-11-09 10:49:37,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824873448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:37,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270334337] [2021-11-09 10:49:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:37,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:37,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:37,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:37,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:49:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:38,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:49:38,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:38,695 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-09 10:49:38,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-09 10:49:38,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 110 [2021-11-09 10:49:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 80 [2021-11-09 10:49:38,745 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-09 10:49:38,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-09 10:49:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 10:49:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-09 10:49:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270334337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:39,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-11-09 10:49:39,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644920546] [2021-11-09 10:49:39,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:39,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:49:39,590 INFO L87 Difference]: Start difference. First operand 4690 states and 7339 transitions. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:44,434 INFO L93 Difference]: Finished difference Result 9687 states and 15129 transitions. [2021-11-09 10:49:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:49:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 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 341 [2021-11-09 10:49:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:44,440 INFO L225 Difference]: With dead ends: 9687 [2021-11-09 10:49:44,440 INFO L226 Difference]: Without dead ends: 5020 [2021-11-09 10:49:44,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:49:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2021-11-09 10:49:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 4846. [2021-11-09 10:49:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4846 states, 4845 states have (on average 1.568421052631579) internal successors, (7599), 4845 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 7599 transitions. [2021-11-09 10:49:44,677 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 7599 transitions. Word has length 341 [2021-11-09 10:49:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:44,677 INFO L470 AbstractCegarLoop]: Abstraction has 4846 states and 7599 transitions. [2021-11-09 10:49:44,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 7599 transitions. [2021-11-09 10:49:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-09 10:49:44,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:44,682 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 10:49:44,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-09 10:49:44,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:44,883 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1779158444, now seen corresponding path program 1 times [2021-11-09 10:49:44,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:44,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64892783] [2021-11-09 10:49:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:44,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 701 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 10:49:45,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:45,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64892783] [2021-11-09 10:49:45,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64892783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:45,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:45,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:49:45,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352976367] [2021-11-09 10:49:45,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:45,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:45,016 INFO L87 Difference]: Start difference. First operand 4846 states and 7599 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:47,586 INFO L93 Difference]: Finished difference Result 9831 states and 15365 transitions. [2021-11-09 10:49:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:49:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 341 [2021-11-09 10:49:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:47,592 INFO L225 Difference]: With dead ends: 9831 [2021-11-09 10:49:47,592 INFO L226 Difference]: Without dead ends: 5008 [2021-11-09 10:49:47,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:49:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2021-11-09 10:49:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 4846. [2021-11-09 10:49:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4846 states, 4845 states have (on average 1.5667698658410734) internal successors, (7591), 4845 states have internal predecessors, (7591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 7591 transitions. [2021-11-09 10:49:47,837 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 7591 transitions. Word has length 341 [2021-11-09 10:49:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:47,837 INFO L470 AbstractCegarLoop]: Abstraction has 4846 states and 7591 transitions. [2021-11-09 10:49:47,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 7591 transitions. [2021-11-09 10:49:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-09 10:49:47,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:47,842 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 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] [2021-11-09 10:49:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-11-09 10:49:47,843 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 400840936, now seen corresponding path program 1 times [2021-11-09 10:49:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:47,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098837086] [2021-11-09 10:49:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:47,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 577 proven. 60 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-11-09 10:49:48,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:48,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098837086] [2021-11-09 10:49:48,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098837086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:48,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801809802] [2021-11-09 10:49:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:48,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:48,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:48,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:49:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:49:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:49,897 INFO L354 Elim1Store]: treesize reduction 74, result has 46.0 percent of original size [2021-11-09 10:49:49,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 163 [2021-11-09 10:49:49,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 110 [2021-11-09 10:49:49,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 80 [2021-11-09 10:49:49,950 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-09 10:49:49,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-09 10:49:50,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 10:49:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 664 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-09 10:49:50,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801809802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:50,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:50,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-09 10:49:50,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712294959] [2021-11-09 10:49:50,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:49:50,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:49:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:49:50,648 INFO L87 Difference]: Start difference. First operand 4846 states and 7591 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:57,685 INFO L93 Difference]: Finished difference Result 9827 states and 15347 transitions. [2021-11-09 10:49:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:49:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 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 342 [2021-11-09 10:49:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:57,691 INFO L225 Difference]: With dead ends: 9827 [2021-11-09 10:49:57,691 INFO L226 Difference]: Without dead ends: 5004 [2021-11-09 10:49:57,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:49:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2021-11-09 10:49:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 4826. [2021-11-09 10:49:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.5653886010362694) internal successors, (7553), 4825 states have internal predecessors, (7553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7553 transitions. [2021-11-09 10:49:57,871 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7553 transitions. Word has length 342 [2021-11-09 10:49:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:57,871 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7553 transitions. [2021-11-09 10:49:57,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7553 transitions. [2021-11-09 10:49:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-09 10:49:57,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:57,876 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 10:49:57,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:58,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:58,077 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:58,078 INFO L85 PathProgramCache]: Analyzing trace with hash 267979602, now seen corresponding path program 1 times [2021-11-09 10:49:58,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:58,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704060545] [2021-11-09 10:49:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:58,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 708 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-09 10:49:58,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:58,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704060545] [2021-11-09 10:49:58,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704060545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:49:58,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:49:58,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:49:58,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460519134] [2021-11-09 10:49:58,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:49:58,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:58,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:49:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:49:58,197 INFO L87 Difference]: Start difference. First operand 4826 states and 7553 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:00,686 INFO L93 Difference]: Finished difference Result 9775 states and 15257 transitions. [2021-11-09 10:50:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:50:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2021-11-09 10:50:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:00,691 INFO L225 Difference]: With dead ends: 9775 [2021-11-09 10:50:00,691 INFO L226 Difference]: Without dead ends: 4972 [2021-11-09 10:50:00,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-11-09 10:50:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4826. [2021-11-09 10:50:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.5637305699481865) internal successors, (7545), 4825 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:00,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7545 transitions. [2021-11-09 10:50:00,838 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7545 transitions. Word has length 342 [2021-11-09 10:50:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:00,838 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7545 transitions. [2021-11-09 10:50:00,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7545 transitions. [2021-11-09 10:50:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-09 10:50:00,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:00,842 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:50:00,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-11-09 10:50:00,843 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1676437080, now seen corresponding path program 1 times [2021-11-09 10:50:00,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:00,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836573108] [2021-11-09 10:50:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:00,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-09 10:50:00,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:00,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836573108] [2021-11-09 10:50:00,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836573108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:00,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:00,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:50:00,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967327176] [2021-11-09 10:50:00,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:50:00,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:00,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:50:00,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:00,955 INFO L87 Difference]: Start difference. First operand 4826 states and 7545 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:03,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:03,465 INFO L93 Difference]: Finished difference Result 9775 states and 15241 transitions. [2021-11-09 10:50:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:50:03,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 347 [2021-11-09 10:50:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:03,469 INFO L225 Difference]: With dead ends: 9775 [2021-11-09 10:50:03,469 INFO L226 Difference]: Without dead ends: 4972 [2021-11-09 10:50:03,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2021-11-09 10:50:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 4826. [2021-11-09 10:50:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.5620725388601036) internal successors, (7537), 4825 states have internal predecessors, (7537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7537 transitions. [2021-11-09 10:50:03,618 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7537 transitions. Word has length 347 [2021-11-09 10:50:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:03,618 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7537 transitions. [2021-11-09 10:50:03,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7537 transitions. [2021-11-09 10:50:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-09 10:50:03,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:03,623 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:50:03,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-11-09 10:50:03,623 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash -632003506, now seen corresponding path program 1 times [2021-11-09 10:50:03,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:03,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136953544] [2021-11-09 10:50:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:03,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 703 proven. 86 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-11-09 10:50:03,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:03,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136953544] [2021-11-09 10:50:03,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136953544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:03,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075417281] [2021-11-09 10:50:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:03,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:03,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:03,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:03,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:50:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:50:04,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:04,810 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:50:04,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:50:04,932 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:50:04,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:50:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-09 10:50:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-09 10:50:05,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:50:05,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:50:05,295 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:50:05,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:50:05,640 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:50:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:50:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 703 proven. 72 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-09 10:50:06,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075417281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:06,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:06,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-09 10:50:06,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949470316] [2021-11-09 10:50:06,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:50:06,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:50:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:50:06,127 INFO L87 Difference]: Start difference. First operand 4826 states and 7537 transitions. Second operand has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:16,286 INFO L93 Difference]: Finished difference Result 10363 states and 15997 transitions. [2021-11-09 10:50:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:50:16,287 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 0 states have call successors, (0), 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 347 [2021-11-09 10:50:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:16,293 INFO L225 Difference]: With dead ends: 10363 [2021-11-09 10:50:16,293 INFO L226 Difference]: Without dead ends: 5560 [2021-11-09 10:50:16,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:50:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2021-11-09 10:50:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 4826. [2021-11-09 10:50:16,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.558756476683938) internal successors, (7521), 4825 states have internal predecessors, (7521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7521 transitions. [2021-11-09 10:50:16,509 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7521 transitions. Word has length 347 [2021-11-09 10:50:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:16,509 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7521 transitions. [2021-11-09 10:50:16,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7521 transitions. [2021-11-09 10:50:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-09 10:50:16,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:16,513 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:50:16,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-09 10:50:16,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:16,717 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:16,717 INFO L85 PathProgramCache]: Analyzing trace with hash 712361294, now seen corresponding path program 1 times [2021-11-09 10:50:16,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:16,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745785988] [2021-11-09 10:50:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:16,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 687 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-09 10:50:16,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:16,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745785988] [2021-11-09 10:50:16,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745785988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:16,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:16,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:50:16,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220241869] [2021-11-09 10:50:16,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:50:16,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:50:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:50:16,807 INFO L87 Difference]: Start difference. First operand 4826 states and 7521 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:19,353 INFO L93 Difference]: Finished difference Result 9743 states and 15149 transitions. [2021-11-09 10:50:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:50:19,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-11-09 10:50:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:19,359 INFO L225 Difference]: With dead ends: 9743 [2021-11-09 10:50:19,359 INFO L226 Difference]: Without dead ends: 4940 [2021-11-09 10:50:19,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2021-11-09 10:50:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 4826. [2021-11-09 10:50:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.557098445595855) internal successors, (7513), 4825 states have internal predecessors, (7513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7513 transitions. [2021-11-09 10:50:19,544 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7513 transitions. Word has length 348 [2021-11-09 10:50:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:19,544 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7513 transitions. [2021-11-09 10:50:19,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7513 transitions. [2021-11-09 10:50:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-11-09 10:50:19,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:19,550 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 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] [2021-11-09 10:50:19,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-11-09 10:50:19,550 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1778500191, now seen corresponding path program 1 times [2021-11-09 10:50:19,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:19,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632254178] [2021-11-09 10:50:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:19,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 707 proven. 88 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-09 10:50:19,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:19,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632254178] [2021-11-09 10:50:19,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632254178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:19,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629758701] [2021-11-09 10:50:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:19,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:19,767 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:19,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:50:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:50:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:20,964 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:50:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:50:21,115 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:50:21,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:50:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-09 10:50:21,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 10:50:21,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 10:50:21,484 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 10:50:21,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2021-11-09 10:50:21,752 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:50:21,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:50:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 708 proven. 71 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-11-09 10:50:22,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629758701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:22,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:22,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2021-11-09 10:50:22,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948850167] [2021-11-09 10:50:22,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:50:22,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:50:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:50:22,042 INFO L87 Difference]: Start difference. First operand 4826 states and 7513 transitions. Second operand has 11 states, 11 states have (on average 23.818181818181817) internal successors, (262), 11 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:33,731 INFO L93 Difference]: Finished difference Result 10327 states and 15905 transitions. [2021-11-09 10:50:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:50:33,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.818181818181817) internal successors, (262), 11 states have internal predecessors, (262), 0 states have call successors, (0), 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 348 [2021-11-09 10:50:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:33,737 INFO L225 Difference]: With dead ends: 10327 [2021-11-09 10:50:33,737 INFO L226 Difference]: Without dead ends: 5524 [2021-11-09 10:50:33,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 344 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:50:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-11-09 10:50:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 4554. [2021-11-09 10:50:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 1.5501866900944432) internal successors, (7058), 4553 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7058 transitions. [2021-11-09 10:50:33,981 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7058 transitions. Word has length 348 [2021-11-09 10:50:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:33,981 INFO L470 AbstractCegarLoop]: Abstraction has 4554 states and 7058 transitions. [2021-11-09 10:50:33,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.818181818181817) internal successors, (262), 11 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7058 transitions. [2021-11-09 10:50:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-09 10:50:33,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:33,986 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:50:34,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:34,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:34,187 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1310451481, now seen corresponding path program 2 times [2021-11-09 10:50:34,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:34,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439075266] [2021-11-09 10:50:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:34,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-11-09 10:50:34,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:34,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439075266] [2021-11-09 10:50:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439075266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:50:34,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:50:34,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:50:34,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844584699] [2021-11-09 10:50:34,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:50:34,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:50:34,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:50:34,469 INFO L87 Difference]: Start difference. First operand 4554 states and 7058 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:39,042 INFO L93 Difference]: Finished difference Result 9105 states and 14112 transitions. [2021-11-09 10:50:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:50:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-11-09 10:50:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:39,049 INFO L225 Difference]: With dead ends: 9105 [2021-11-09 10:50:39,049 INFO L226 Difference]: Without dead ends: 4554 [2021-11-09 10:50:39,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:50:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-11-09 10:50:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 4554. [2021-11-09 10:50:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 1.549967054689216) internal successors, (7057), 4553 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 7057 transitions. [2021-11-09 10:50:39,257 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 7057 transitions. Word has length 355 [2021-11-09 10:50:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:39,258 INFO L470 AbstractCegarLoop]: Abstraction has 4554 states and 7057 transitions. [2021-11-09 10:50:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 7057 transitions. [2021-11-09 10:50:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-09 10:50:39,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:39,263 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 10:50:39,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-11-09 10:50:39,263 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:39,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1162756329, now seen corresponding path program 1 times [2021-11-09 10:50:39,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:39,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115220744] [2021-11-09 10:50:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:39,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 567 proven. 473 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-09 10:50:41,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:41,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115220744] [2021-11-09 10:50:41,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115220744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:41,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870092464] [2021-11-09 10:50:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:41,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:41,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:41,251 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cd19319-83aa-437d-8d11-b33e3a4c37a0/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:50:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-09 10:50:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-09 10:50:43,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:50:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 10:50:43,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-09 10:50:43,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-09 10:50:43,618 INFO L354 Elim1Store]: treesize reduction 43, result has 36.8 percent of original size [2021-11-09 10:50:43,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 124 [2021-11-09 10:50:43,653 INFO L354 Elim1Store]: treesize reduction 27, result has 41.3 percent of original size [2021-11-09 10:50:43,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2021-11-09 10:50:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,699 INFO L354 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2021-11-09 10:50:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 92 [2021-11-09 10:50:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 137 [2021-11-09 10:50:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 118 [2021-11-09 10:50:43,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:43,998 INFO L354 Elim1Store]: treesize reduction 133, result has 24.4 percent of original size [2021-11-09 10:50:43,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 127 treesize of output 145 [2021-11-09 10:50:46,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 174 [2021-11-09 10:50:46,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,586 INFO L354 Elim1Store]: treesize reduction 156, result has 23.5 percent of original size [2021-11-09 10:50:46,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 195 treesize of output 193 [2021-11-09 10:50:46,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:46,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 171 [2021-11-09 10:50:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:49,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 116 [2021-11-09 10:50:49,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:49,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:49,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:49,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,000 INFO L354 Elim1Store]: treesize reduction 183, result has 10.3 percent of original size [2021-11-09 10:50:50,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 119 treesize of output 115 [2021-11-09 10:50:50,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 78 [2021-11-09 10:50:50,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 93 [2021-11-09 10:50:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,175 INFO L354 Elim1Store]: treesize reduction 183, result has 10.3 percent of original size [2021-11-09 10:50:50,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 90 treesize of output 92 [2021-11-09 10:50:50,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:50,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 61 [2021-11-09 10:50:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,401 INFO L354 Elim1Store]: treesize reduction 148, result has 36.8 percent of original size [2021-11-09 10:50:51,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 220 [2021-11-09 10:50:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,508 INFO L354 Elim1Store]: treesize reduction 78, result has 43.5 percent of original size [2021-11-09 10:50:51,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 214 [2021-11-09 10:50:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:51,697 INFO L354 Elim1Store]: treesize reduction 140, result has 50.0 percent of original size [2021-11-09 10:50:51,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 203 treesize of output 297 [2021-11-09 10:51:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,169 INFO L354 Elim1Store]: treesize reduction 143, result has 5.9 percent of original size [2021-11-09 10:51:57,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 523 treesize of output 490 [2021-11-09 10:51:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,289 INFO L354 Elim1Store]: treesize reduction 128, result has 33.7 percent of original size [2021-11-09 10:51:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 499 treesize of output 475 [2021-11-09 10:51:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,451 INFO L354 Elim1Store]: treesize reduction 138, result has 33.3 percent of original size [2021-11-09 10:51:57,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 542 treesize of output 508 [2021-11-09 10:51:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,570 INFO L354 Elim1Store]: treesize reduction 146, result has 24.4 percent of original size [2021-11-09 10:51:57,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 583 treesize of output 521 [2021-11-09 10:51:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:57,682 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-09 10:51:57,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 604 treesize of output 536