./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.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_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/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_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/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_a82eb00b-89d6-44a7-a863-b71dbd285543/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 b0edcf84130f28de31dd252113e98a7277e8f803d45945a4e4ab5373cd867bd6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:37:49,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:37:49,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:37:49,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:37:49,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:37:49,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:37:49,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:37:49,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:37:49,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:37:49,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:37:49,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:37:49,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:37:49,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:37:49,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:37:49,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:37:49,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:37:49,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:37:49,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:37:49,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:37:49,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:37:49,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:37:49,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:37:49,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:37:49,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:37:49,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:37:49,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:37:49,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:37:49,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:37:49,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:37:49,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:37:49,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:37:49,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:37:49,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:37:49,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:37:49,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:37:49,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:37:49,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:37:49,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:37:49,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:37:49,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:37:49,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:37:49,481 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:37:49,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:37:49,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:37:49,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:37:49,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:37:49,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:37:49,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:37:49,541 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:37:49,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:37:49,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:37:49,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:37:49,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:37:49,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:37:49,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:37:49,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:37:49,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:37:49,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:37:49,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:37:49,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:37:49,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:37:49,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:37:49,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:37:49,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:37:49,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:37:49,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:37:49,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:37:49,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:37:49,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:37:49,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:37:49,550 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:37:49,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:37:49,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:37:49,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:37:49,554 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_a82eb00b-89d6-44a7-a863-b71dbd285543/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0edcf84130f28de31dd252113e98a7277e8f803d45945a4e4ab5373cd867bd6 [2021-11-09 09:37:49,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:37:49,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:37:49,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:37:49,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:37:49,963 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:37:49,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c [2021-11-09 09:37:50,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/data/6d28fdc24/49ac1096710e45bab40f318e4a227f44/FLAG0a9592f67 [2021-11-09 09:37:50,832 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:37:50,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c [2021-11-09 09:37:50,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/data/6d28fdc24/49ac1096710e45bab40f318e4a227f44/FLAG0a9592f67 [2021-11-09 09:37:50,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/data/6d28fdc24/49ac1096710e45bab40f318e4a227f44 [2021-11-09 09:37:50,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:37:50,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:37:50,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:37:50,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:37:50,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:37:50,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:37:50" (1/1) ... [2021-11-09 09:37:50,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba649ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:50, skipping insertion in model container [2021-11-09 09:37:50,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:37:50" (1/1) ... [2021-11-09 09:37:50,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:37:51,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:37:51,638 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_a82eb00b-89d6-44a7-a863-b71dbd285543/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c[65398,65411] [2021-11-09 09:37:51,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:37:51,673 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:37:51,875 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_a82eb00b-89d6-44a7-a863-b71dbd285543/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c[65398,65411] [2021-11-09 09:37:51,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:37:51,935 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:37:51,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51 WrapperNode [2021-11-09 09:37:51,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:37:51,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:37:51,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:37:51,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:37:51,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:37:52,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:37:52,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:37:52,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:37:52,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:37:52,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:37:52,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:37:52,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:37:52,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (1/1) ... [2021-11-09 09:37:52,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:37:52,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:52,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:37:52,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:37:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:37:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:37:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:37:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:37:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:37:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:37:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:37:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:37:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:37:52,641 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 09:37:55,865 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-09 09:37:55,866 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-09 09:37:55,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:37:55,877 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 09:37:55,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:37:55 BoogieIcfgContainer [2021-11-09 09:37:55,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:37:55,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:37:55,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:37:55,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:37:55,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:37:50" (1/3) ... [2021-11-09 09:37:55,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a618cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:37:55, skipping insertion in model container [2021-11-09 09:37:55,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:37:51" (2/3) ... [2021-11-09 09:37:55,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a618cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:37:55, skipping insertion in model container [2021-11-09 09:37:55,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:37:55" (3/3) ... [2021-11-09 09:37:55,892 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-2.c [2021-11-09 09:37:55,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:37:55,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:37:55,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:37:55,991 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 09:37:55,992 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:37:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 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 09:37:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:37:56,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:56,045 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] [2021-11-09 09:37:56,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-11-09 09:37:56,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:56,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295513155] [2021-11-09 09:37:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:56,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:56,706 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 09:37:56,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:56,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295513155] [2021-11-09 09:37:56,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295513155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:56,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:56,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:37:56,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297765913] [2021-11-09 09:37:56,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:37:56,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:56,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:37:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:37:56,748 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 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) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:59,275 INFO L93 Difference]: Finished difference Result 255 states and 430 transitions. [2021-11-09 09:37:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:37:59,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-09 09:37:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:59,304 INFO L225 Difference]: With dead ends: 255 [2021-11-09 09:37:59,305 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 09:37:59,309 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 09:37:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 09:37:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-09 09:37:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 172 transitions. [2021-11-09 09:37:59,426 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 172 transitions. Word has length 24 [2021-11-09 09:37:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:59,427 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 172 transitions. [2021-11-09 09:37:59,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 172 transitions. [2021-11-09 09:37:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:37:59,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:59,434 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] [2021-11-09 09:37:59,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:37:59,435 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1001988123, now seen corresponding path program 1 times [2021-11-09 09:37:59,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:59,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178593157] [2021-11-09 09:37:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:59,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:37:59,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:59,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178593157] [2021-11-09 09:37:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178593157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:59,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:59,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:59,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392304365] [2021-11-09 09:37:59,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:59,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:59,667 INFO L87 Difference]: Start difference. First operand 115 states and 172 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:59,740 INFO L93 Difference]: Finished difference Result 320 states and 482 transitions. [2021-11-09 09:37:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:37:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 38 [2021-11-09 09:37:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:59,745 INFO L225 Difference]: With dead ends: 320 [2021-11-09 09:37:59,746 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 09:37:59,748 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 09:37:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 09:37:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-11-09 09:37:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4906542056074767) internal successors, (319), 214 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 319 transitions. [2021-11-09 09:37:59,782 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 319 transitions. Word has length 38 [2021-11-09 09:37:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:59,783 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 319 transitions. [2021-11-09 09:37:59,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:37:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 319 transitions. [2021-11-09 09:37:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:37:59,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:59,788 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:37:59,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:37:59,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:37:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 996888307, now seen corresponding path program 1 times [2021-11-09 09:37:59,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:59,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689257434] [2021-11-09 09:37:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:59,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:37:59,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:59,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689257434] [2021-11-09 09:37:59,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689257434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:59,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:59,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:37:59,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175096609] [2021-11-09 09:37:59,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:37:59,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:59,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:37:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:37:59,967 INFO L87 Difference]: Start difference. First operand 215 states and 319 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:02,080 INFO L93 Difference]: Finished difference Result 420 states and 630 transitions. [2021-11-09 09:38:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:38:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 09:38:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:02,091 INFO L225 Difference]: With dead ends: 420 [2021-11-09 09:38:02,092 INFO L226 Difference]: Without dead ends: 315 [2021-11-09 09:38:02,093 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 09:38:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-09 09:38:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-09 09:38:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.484076433121019) internal successors, (466), 314 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 466 transitions. [2021-11-09 09:38:02,176 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 466 transitions. Word has length 53 [2021-11-09 09:38:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:02,177 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 466 transitions. [2021-11-09 09:38:02,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 466 transitions. [2021-11-09 09:38:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:38:02,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:02,187 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:38:02,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:38:02,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:02,189 INFO L85 PathProgramCache]: Analyzing trace with hash -973367758, now seen corresponding path program 1 times [2021-11-09 09:38:02,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:02,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694321951] [2021-11-09 09:38:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:02,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:02,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:02,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694321951] [2021-11-09 09:38:02,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694321951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:02,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:02,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:02,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666075246] [2021-11-09 09:38:02,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:02,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:02,354 INFO L87 Difference]: Start difference. First operand 315 states and 466 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:07,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:07,102 INFO L93 Difference]: Finished difference Result 805 states and 1196 transitions. [2021-11-09 09:38:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 09:38:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:07,110 INFO L225 Difference]: With dead ends: 805 [2021-11-09 09:38:07,110 INFO L226 Difference]: Without dead ends: 500 [2021-11-09 09:38:07,113 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 09:38:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-09 09:38:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 365. [2021-11-09 09:38:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5164835164835164) internal successors, (552), 364 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 552 transitions. [2021-11-09 09:38:07,150 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 552 transitions. Word has length 71 [2021-11-09 09:38:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:07,151 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 552 transitions. [2021-11-09 09:38:07,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 552 transitions. [2021-11-09 09:38:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:38:07,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:07,157 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:38:07,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:38:07,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:07,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1107381264, now seen corresponding path program 1 times [2021-11-09 09:38:07,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:07,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711903927] [2021-11-09 09:38:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:07,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:07,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:07,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711903927] [2021-11-09 09:38:07,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711903927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:07,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:07,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:07,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587249148] [2021-11-09 09:38:07,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:07,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:07,324 INFO L87 Difference]: Start difference. First operand 365 states and 552 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:11,823 INFO L93 Difference]: Finished difference Result 805 states and 1217 transitions. [2021-11-09 09:38:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 09:38:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:11,828 INFO L225 Difference]: With dead ends: 805 [2021-11-09 09:38:11,828 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 09:38:11,830 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 09:38:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 09:38:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 405. [2021-11-09 09:38:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.5346534653465347) internal successors, (620), 404 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 620 transitions. [2021-11-09 09:38:11,854 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 620 transitions. Word has length 71 [2021-11-09 09:38:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:11,855 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 620 transitions. [2021-11-09 09:38:11,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 620 transitions. [2021-11-09 09:38:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 09:38:11,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:11,858 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:38:11,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:38:11,858 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -114315255, now seen corresponding path program 1 times [2021-11-09 09:38:11,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:11,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047627161] [2021-11-09 09:38:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:11,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:12,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:12,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047627161] [2021-11-09 09:38:12,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047627161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:12,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:12,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:12,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684346576] [2021-11-09 09:38:12,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:12,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:12,046 INFO L87 Difference]: Start difference. First operand 405 states and 620 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:16,799 INFO L93 Difference]: Finished difference Result 927 states and 1408 transitions. [2021-11-09 09:38:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 72 [2021-11-09 09:38:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:16,805 INFO L225 Difference]: With dead ends: 927 [2021-11-09 09:38:16,805 INFO L226 Difference]: Without dead ends: 532 [2021-11-09 09:38:16,807 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 09:38:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-09 09:38:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 407. [2021-11-09 09:38:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5320197044334976) internal successors, (622), 406 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 622 transitions. [2021-11-09 09:38:16,828 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 622 transitions. Word has length 72 [2021-11-09 09:38:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:16,828 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 622 transitions. [2021-11-09 09:38:16,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 622 transitions. [2021-11-09 09:38:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:38:16,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:16,831 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-11-09 09:38:16,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:38:16,831 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1902129482, now seen corresponding path program 2 times [2021-11-09 09:38:16,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:16,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009346240] [2021-11-09 09:38:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:16,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:16,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:16,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009346240] [2021-11-09 09:38:16,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009346240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:16,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:16,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:16,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557022279] [2021-11-09 09:38:16,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:16,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:16,965 INFO L87 Difference]: Start difference. First operand 407 states and 622 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:21,607 INFO L93 Difference]: Finished difference Result 927 states and 1406 transitions. [2021-11-09 09:38:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:21,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 09:38:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:21,613 INFO L225 Difference]: With dead ends: 927 [2021-11-09 09:38:21,613 INFO L226 Difference]: Without dead ends: 530 [2021-11-09 09:38:21,614 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 09:38:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-09 09:38:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 407. [2021-11-09 09:38:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5270935960591132) internal successors, (620), 406 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 620 transitions. [2021-11-09 09:38:21,634 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 620 transitions. Word has length 85 [2021-11-09 09:38:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:21,635 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 620 transitions. [2021-11-09 09:38:21,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 620 transitions. [2021-11-09 09:38:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:38:21,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:21,638 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-09 09:38:21,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:38:21,638 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash 793149036, now seen corresponding path program 1 times [2021-11-09 09:38:21,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:21,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475580826] [2021-11-09 09:38:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:21,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:21,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:21,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475580826] [2021-11-09 09:38:21,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475580826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:21,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:21,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:21,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926341567] [2021-11-09 09:38:21,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:21,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:21,816 INFO L87 Difference]: Start difference. First operand 407 states and 620 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:26,442 INFO L93 Difference]: Finished difference Result 927 states and 1402 transitions. [2021-11-09 09:38:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:26,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 09:38:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:26,449 INFO L225 Difference]: With dead ends: 927 [2021-11-09 09:38:26,449 INFO L226 Difference]: Without dead ends: 530 [2021-11-09 09:38:26,450 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 09:38:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-09 09:38:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 407. [2021-11-09 09:38:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.522167487684729) internal successors, (618), 406 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 618 transitions. [2021-11-09 09:38:26,470 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 618 transitions. Word has length 85 [2021-11-09 09:38:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:26,471 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 618 transitions. [2021-11-09 09:38:26,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 618 transitions. [2021-11-09 09:38:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:38:26,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:26,478 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-11-09 09:38:26,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:38:26,479 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 872770184, now seen corresponding path program 2 times [2021-11-09 09:38:26,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:26,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708690906] [2021-11-09 09:38:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:26,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:26,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:26,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708690906] [2021-11-09 09:38:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708690906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:26,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:26,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:26,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427768532] [2021-11-09 09:38:26,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:26,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:26,626 INFO L87 Difference]: Start difference. First operand 407 states and 618 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:31,098 INFO L93 Difference]: Finished difference Result 847 states and 1277 transitions. [2021-11-09 09:38:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 09:38:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:31,103 INFO L225 Difference]: With dead ends: 847 [2021-11-09 09:38:31,103 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 09:38:31,105 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 09:38:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 09:38:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 407. [2021-11-09 09:38:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5172413793103448) internal successors, (616), 406 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 616 transitions. [2021-11-09 09:38:31,126 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 616 transitions. Word has length 85 [2021-11-09 09:38:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:31,126 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 616 transitions. [2021-11-09 09:38:31,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 616 transitions. [2021-11-09 09:38:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 09:38:31,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:31,129 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-11-09 09:38:31,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:38:31,130 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -236210262, now seen corresponding path program 1 times [2021-11-09 09:38:31,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:31,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766968531] [2021-11-09 09:38:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:31,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:31,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:31,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766968531] [2021-11-09 09:38:31,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766968531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:31,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:31,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:31,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121446804] [2021-11-09 09:38:31,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:31,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:31,267 INFO L87 Difference]: Start difference. First operand 407 states and 616 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:35,715 INFO L93 Difference]: Finished difference Result 847 states and 1273 transitions. [2021-11-09 09:38:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:35,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-09 09:38:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:35,720 INFO L225 Difference]: With dead ends: 847 [2021-11-09 09:38:35,721 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 09:38:35,722 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 09:38:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 09:38:35,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 407. [2021-11-09 09:38:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5123152709359606) internal successors, (614), 406 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 614 transitions. [2021-11-09 09:38:35,743 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 614 transitions. Word has length 85 [2021-11-09 09:38:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:35,744 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 614 transitions. [2021-11-09 09:38:35,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 614 transitions. [2021-11-09 09:38:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 09:38:35,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:35,747 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2021-11-09 09:38:35,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:38:35,748 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1127790653, now seen corresponding path program 1 times [2021-11-09 09:38:35,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:35,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655316794] [2021-11-09 09:38:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:35,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:35,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:35,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655316794] [2021-11-09 09:38:35,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655316794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:35,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:35,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:35,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330803006] [2021-11-09 09:38:35,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:35,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:35,862 INFO L87 Difference]: Start difference. First operand 407 states and 614 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:40,449 INFO L93 Difference]: Finished difference Result 927 states and 1390 transitions. [2021-11-09 09:38:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 86 [2021-11-09 09:38:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:40,455 INFO L225 Difference]: With dead ends: 927 [2021-11-09 09:38:40,455 INFO L226 Difference]: Without dead ends: 530 [2021-11-09 09:38:40,456 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 09:38:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-09 09:38:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 407. [2021-11-09 09:38:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5073891625615763) internal successors, (612), 406 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 612 transitions. [2021-11-09 09:38:40,476 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 612 transitions. Word has length 86 [2021-11-09 09:38:40,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:40,477 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 612 transitions. [2021-11-09 09:38:40,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 612 transitions. [2021-11-09 09:38:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-09 09:38:40,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:40,479 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2021-11-09 09:38:40,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:38:40,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1321809477, now seen corresponding path program 1 times [2021-11-09 09:38:40,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:40,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708779050] [2021-11-09 09:38:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:40,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:40,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:40,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708779050] [2021-11-09 09:38:40,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708779050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:40,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:40,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:40,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528659661] [2021-11-09 09:38:40,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:40,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:40,593 INFO L87 Difference]: Start difference. First operand 407 states and 612 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:45,054 INFO L93 Difference]: Finished difference Result 847 states and 1265 transitions. [2021-11-09 09:38:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 86 [2021-11-09 09:38:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:45,059 INFO L225 Difference]: With dead ends: 847 [2021-11-09 09:38:45,059 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 09:38:45,061 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 09:38:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 09:38:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 407. [2021-11-09 09:38:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.5024630541871922) internal successors, (610), 406 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 610 transitions. [2021-11-09 09:38:45,080 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 610 transitions. Word has length 86 [2021-11-09 09:38:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:45,081 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 610 transitions. [2021-11-09 09:38:45,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:45,081 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 610 transitions. [2021-11-09 09:38:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:38:45,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:45,085 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-11-09 09:38:45,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:38:45,085 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -490798233, now seen corresponding path program 1 times [2021-11-09 09:38:45,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:45,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667894006] [2021-11-09 09:38:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:45,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:45,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:45,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667894006] [2021-11-09 09:38:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667894006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:45,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:45,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:45,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204679717] [2021-11-09 09:38:45,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:45,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:45,207 INFO L87 Difference]: Start difference. First operand 407 states and 610 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:38:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:49,792 INFO L93 Difference]: Finished difference Result 927 states and 1382 transitions. [2021-11-09 09:38:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:49,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 87 [2021-11-09 09:38:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:49,797 INFO L225 Difference]: With dead ends: 927 [2021-11-09 09:38:49,798 INFO L226 Difference]: Without dead ends: 530 [2021-11-09 09:38:49,799 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 09:38:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-09 09:38:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 407. [2021-11-09 09:38:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4975369458128078) internal successors, (608), 406 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 608 transitions. [2021-11-09 09:38:49,819 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 608 transitions. Word has length 87 [2021-11-09 09:38:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:49,819 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 608 transitions. [2021-11-09 09:38:49,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:38:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 608 transitions. [2021-11-09 09:38:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:38:49,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:49,822 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 09:38:49,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:38:49,823 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1383461914, now seen corresponding path program 1 times [2021-11-09 09:38:49,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:49,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032093162] [2021-11-09 09:38:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:49,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:49,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:49,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032093162] [2021-11-09 09:38:49,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032093162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:49,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:49,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:49,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389101191] [2021-11-09 09:38:49,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:49,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:49,969 INFO L87 Difference]: Start difference. First operand 407 states and 608 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:38:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:54,626 INFO L93 Difference]: Finished difference Result 783 states and 1162 transitions. [2021-11-09 09:38:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 87 [2021-11-09 09:38:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:54,632 INFO L225 Difference]: With dead ends: 783 [2021-11-09 09:38:54,632 INFO L226 Difference]: Without dead ends: 530 [2021-11-09 09:38:54,633 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 09:38:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-09 09:38:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 407. [2021-11-09 09:38:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4926108374384237) internal successors, (606), 406 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 606 transitions. [2021-11-09 09:38:54,653 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 606 transitions. Word has length 87 [2021-11-09 09:38:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:54,654 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 606 transitions. [2021-11-09 09:38:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:38:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 606 transitions. [2021-11-09 09:38:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:38:54,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:54,657 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-11-09 09:38:54,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:38:54,658 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:54,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1862605531, now seen corresponding path program 1 times [2021-11-09 09:38:54,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:54,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642404147] [2021-11-09 09:38:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:54,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:54,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:54,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642404147] [2021-11-09 09:38:54,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642404147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:54,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:54,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:54,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967106682] [2021-11-09 09:38:54,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:54,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:54,767 INFO L87 Difference]: Start difference. First operand 407 states and 606 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:38:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:59,167 INFO L93 Difference]: Finished difference Result 847 states and 1253 transitions. [2021-11-09 09:38:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:38:59,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 87 [2021-11-09 09:38:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:59,172 INFO L225 Difference]: With dead ends: 847 [2021-11-09 09:38:59,172 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 09:38:59,173 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 09:38:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 09:38:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 407. [2021-11-09 09:38:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4876847290640394) internal successors, (604), 406 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:38:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 604 transitions. [2021-11-09 09:38:59,191 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 604 transitions. Word has length 87 [2021-11-09 09:38:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:59,192 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 604 transitions. [2021-11-09 09:38:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:38:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 604 transitions. [2021-11-09 09:38:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:38:59,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:59,195 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 09:38:59,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:38:59,195 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:38:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash 11654616, now seen corresponding path program 1 times [2021-11-09 09:38:59,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:59,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250607580] [2021-11-09 09:38:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:59,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:38:59,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:59,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250607580] [2021-11-09 09:38:59,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250607580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:38:59,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:38:59,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:38:59,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531025203] [2021-11-09 09:38:59,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:38:59,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:59,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:38:59,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:38:59,300 INFO L87 Difference]: Start difference. First operand 407 states and 604 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:39:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:03,743 INFO L93 Difference]: Finished difference Result 703 states and 1035 transitions. [2021-11-09 09:39:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 87 [2021-11-09 09:39:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:03,748 INFO L225 Difference]: With dead ends: 703 [2021-11-09 09:39:03,748 INFO L226 Difference]: Without dead ends: 450 [2021-11-09 09:39:03,749 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 09:39:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-09 09:39:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 407. [2021-11-09 09:39:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4827586206896552) internal successors, (602), 406 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 602 transitions. [2021-11-09 09:39:03,787 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 602 transitions. Word has length 87 [2021-11-09 09:39:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:03,788 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 602 transitions. [2021-11-09 09:39:03,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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 09:39:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 602 transitions. [2021-11-09 09:39:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:39:03,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:03,792 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-09 09:39:03,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:39:03,792 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2132678238, now seen corresponding path program 1 times [2021-11-09 09:39:03,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:03,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058514482] [2021-11-09 09:39:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:03,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:39:03,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:03,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058514482] [2021-11-09 09:39:03,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058514482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:03,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:03,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:39:03,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535858922] [2021-11-09 09:39:03,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:39:03,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:03,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:39:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:39:03,906 INFO L87 Difference]: Start difference. First operand 407 states and 602 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:08,399 INFO L93 Difference]: Finished difference Result 909 states and 1344 transitions. [2021-11-09 09:39:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 88 [2021-11-09 09:39:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:08,406 INFO L225 Difference]: With dead ends: 909 [2021-11-09 09:39:08,406 INFO L226 Difference]: Without dead ends: 512 [2021-11-09 09:39:08,408 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 09:39:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-09 09:39:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 407. [2021-11-09 09:39:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.477832512315271) internal successors, (600), 406 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 600 transitions. [2021-11-09 09:39:08,428 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 600 transitions. Word has length 88 [2021-11-09 09:39:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:08,428 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 600 transitions. [2021-11-09 09:39:08,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 600 transitions. [2021-11-09 09:39:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:39:08,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:08,431 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 09:39:08,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 09:39:08,432 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1903796849, now seen corresponding path program 1 times [2021-11-09 09:39:08,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:08,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652753314] [2021-11-09 09:39:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:08,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:39:08,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:08,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652753314] [2021-11-09 09:39:08,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652753314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:08,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:08,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:39:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357479080] [2021-11-09 09:39:08,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:39:08,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:39:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:39:08,552 INFO L87 Difference]: Start difference. First operand 407 states and 600 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:13,112 INFO L93 Difference]: Finished difference Result 758 states and 1119 transitions. [2021-11-09 09:39:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 88 [2021-11-09 09:39:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:13,117 INFO L225 Difference]: With dead ends: 758 [2021-11-09 09:39:13,118 INFO L226 Difference]: Without dead ends: 505 [2021-11-09 09:39:13,119 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 09:39:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-09 09:39:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 407. [2021-11-09 09:39:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4729064039408868) internal successors, (598), 406 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 598 transitions. [2021-11-09 09:39:13,137 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 598 transitions. Word has length 88 [2021-11-09 09:39:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:13,138 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 598 transitions. [2021-11-09 09:39:13,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:13,138 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 598 transitions. [2021-11-09 09:39:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:39:13,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:13,141 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-09 09:39:13,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 09:39:13,141 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1738642336, now seen corresponding path program 1 times [2021-11-09 09:39:13,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:13,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274446327] [2021-11-09 09:39:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:13,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:39:13,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:13,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274446327] [2021-11-09 09:39:13,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274446327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:13,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:39:13,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938395632] [2021-11-09 09:39:13,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:39:13,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:39:13,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:39:13,268 INFO L87 Difference]: Start difference. First operand 407 states and 598 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:17,603 INFO L93 Difference]: Finished difference Result 829 states and 1215 transitions. [2021-11-09 09:39:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 88 [2021-11-09 09:39:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:17,608 INFO L225 Difference]: With dead ends: 829 [2021-11-09 09:39:17,608 INFO L226 Difference]: Without dead ends: 432 [2021-11-09 09:39:17,609 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 09:39:17,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-09 09:39:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 407. [2021-11-09 09:39:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4679802955665024) internal successors, (596), 406 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 596 transitions. [2021-11-09 09:39:17,630 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 596 transitions. Word has length 88 [2021-11-09 09:39:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:17,630 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 596 transitions. [2021-11-09 09:39:17,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 596 transitions. [2021-11-09 09:39:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 09:39:17,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:17,633 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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 09:39:17,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 09:39:17,634 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1967523725, now seen corresponding path program 1 times [2021-11-09 09:39:17,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:17,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001664719] [2021-11-09 09:39:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:17,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:39:17,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:17,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001664719] [2021-11-09 09:39:17,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001664719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:17,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:17,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:39:17,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097862093] [2021-11-09 09:39:17,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:39:17,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:39:17,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:39:17,734 INFO L87 Difference]: Start difference. First operand 407 states and 596 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:22,095 INFO L93 Difference]: Finished difference Result 678 states and 992 transitions. [2021-11-09 09:39:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 88 [2021-11-09 09:39:22,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:22,101 INFO L225 Difference]: With dead ends: 678 [2021-11-09 09:39:22,101 INFO L226 Difference]: Without dead ends: 425 [2021-11-09 09:39:22,102 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 09:39:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-09 09:39:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 407. [2021-11-09 09:39:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.4630541871921183) internal successors, (594), 406 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 594 transitions. [2021-11-09 09:39:22,122 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 594 transitions. Word has length 88 [2021-11-09 09:39:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:22,125 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 594 transitions. [2021-11-09 09:39:22,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 594 transitions. [2021-11-09 09:39:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:39:22,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:22,128 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-09 09:39:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 09:39:22,129 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash 730673667, now seen corresponding path program 1 times [2021-11-09 09:39:22,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:22,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996928296] [2021-11-09 09:39:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:22,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:39:22,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:22,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996928296] [2021-11-09 09:39:22,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996928296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:22,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:22,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:39:22,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835249326] [2021-11-09 09:39:22,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:39:22,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:39:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:39:22,283 INFO L87 Difference]: Start difference. First operand 407 states and 594 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 09:39:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:26,811 INFO L93 Difference]: Finished difference Result 902 states and 1319 transitions. [2021-11-09 09:39:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:26,812 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 89 [2021-11-09 09:39:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:26,816 INFO L225 Difference]: With dead ends: 902 [2021-11-09 09:39:26,816 INFO L226 Difference]: Without dead ends: 505 [2021-11-09 09:39:26,817 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 09:39:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-09 09:39:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 407. [2021-11-09 09:39:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.458128078817734) internal successors, (592), 406 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 592 transitions. [2021-11-09 09:39:26,836 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 592 transitions. Word has length 89 [2021-11-09 09:39:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:26,836 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 592 transitions. [2021-11-09 09:39:26,837 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 09:39:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 592 transitions. [2021-11-09 09:39:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-09 09:39:26,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:26,839 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-09 09:39:26,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 09:39:26,840 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash 978820161, now seen corresponding path program 1 times [2021-11-09 09:39:26,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:26,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259055144] [2021-11-09 09:39:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:26,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-09 09:39:26,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:26,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259055144] [2021-11-09 09:39:26,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259055144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:26,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:26,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:39:26,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633819383] [2021-11-09 09:39:26,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:39:26,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:39:26,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:26,943 INFO L87 Difference]: Start difference. First operand 407 states and 592 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:29,018 INFO L93 Difference]: Finished difference Result 806 states and 1179 transitions. [2021-11-09 09:39:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:39:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-09 09:39:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:29,022 INFO L225 Difference]: With dead ends: 806 [2021-11-09 09:39:29,022 INFO L226 Difference]: Without dead ends: 555 [2021-11-09 09:39:29,023 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 09:39:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-09 09:39:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-09 09:39:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.4530685920577617) internal successors, (805), 554 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 805 transitions. [2021-11-09 09:39:29,044 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 805 transitions. Word has length 89 [2021-11-09 09:39:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:29,045 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 805 transitions. [2021-11-09 09:39:29,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 805 transitions. [2021-11-09 09:39:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 09:39:29,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:29,048 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-09 09:39:29,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 09:39:29,048 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1317014729, now seen corresponding path program 1 times [2021-11-09 09:39:29,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:29,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793091813] [2021-11-09 09:39:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:29,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-09 09:39:29,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:29,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793091813] [2021-11-09 09:39:29,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793091813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:29,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:29,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:39:29,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189451017] [2021-11-09 09:39:29,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:39:29,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:39:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:29,146 INFO L87 Difference]: Start difference. First operand 555 states and 805 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:29,209 INFO L93 Difference]: Finished difference Result 1103 states and 1606 transitions. [2021-11-09 09:39:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:39:29,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-09 09:39:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:29,215 INFO L225 Difference]: With dead ends: 1103 [2021-11-09 09:39:29,215 INFO L226 Difference]: Without dead ends: 704 [2021-11-09 09:39:29,217 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 09:39:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-09 09:39:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2021-11-09 09:39:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 1.4551920341394025) internal successors, (1023), 703 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1023 transitions. [2021-11-09 09:39:29,242 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1023 transitions. Word has length 91 [2021-11-09 09:39:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:29,243 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1023 transitions. [2021-11-09 09:39:29,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1023 transitions. [2021-11-09 09:39:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-09 09:39:29,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:29,246 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1] [2021-11-09 09:39:29,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 09:39:29,247 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:29,248 INFO L85 PathProgramCache]: Analyzing trace with hash -761801560, now seen corresponding path program 1 times [2021-11-09 09:39:29,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:29,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279898071] [2021-11-09 09:39:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:29,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-09 09:39:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:29,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279898071] [2021-11-09 09:39:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279898071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:29,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:29,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:39:29,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043340913] [2021-11-09 09:39:29,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:39:29,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:39:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:39:29,377 INFO L87 Difference]: Start difference. First operand 704 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:29,435 INFO L93 Difference]: Finished difference Result 855 states and 1244 transitions. [2021-11-09 09:39:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:39:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 112 [2021-11-09 09:39:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:29,443 INFO L225 Difference]: With dead ends: 855 [2021-11-09 09:39:29,443 INFO L226 Difference]: Without dead ends: 853 [2021-11-09 09:39:29,444 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 09:39:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-09 09:39:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2021-11-09 09:39:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4577464788732395) internal successors, (1242), 852 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 09:39:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1242 transitions. [2021-11-09 09:39:29,475 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1242 transitions. Word has length 112 [2021-11-09 09:39:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:29,475 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 1242 transitions. [2021-11-09 09:39:29,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1242 transitions. [2021-11-09 09:39:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-09 09:39:29,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:29,479 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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 09:39:29,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 09:39:29,480 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -255726450, now seen corresponding path program 1 times [2021-11-09 09:39:29,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:29,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15644198] [2021-11-09 09:39:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:29,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-09 09:39:29,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:29,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15644198] [2021-11-09 09:39:29,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15644198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:29,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:29,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:39:29,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105892674] [2021-11-09 09:39:29,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:39:29,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:39:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:39:29,638 INFO L87 Difference]: Start difference. First operand 853 states and 1242 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 09:39:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:36,771 INFO L93 Difference]: Finished difference Result 2782 states and 4110 transitions. [2021-11-09 09:39:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:39:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 128 [2021-11-09 09:39:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:36,785 INFO L225 Difference]: With dead ends: 2782 [2021-11-09 09:39:36,785 INFO L226 Difference]: Without dead ends: 1939 [2021-11-09 09:39:36,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:39:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-11-09 09:39:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1093. [2021-11-09 09:39:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.510989010989011) internal successors, (1650), 1092 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1650 transitions. [2021-11-09 09:39:36,842 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1650 transitions. Word has length 128 [2021-11-09 09:39:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:36,843 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1650 transitions. [2021-11-09 09:39:36,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 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 09:39:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1650 transitions. [2021-11-09 09:39:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-09 09:39:36,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:36,848 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:36,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:39:36,848 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1737642594, now seen corresponding path program 1 times [2021-11-09 09:39:36,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:36,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607212282] [2021-11-09 09:39:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:36,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-09 09:39:36,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:36,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607212282] [2021-11-09 09:39:36,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607212282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:39:36,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:39:36,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:39:36,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987337686] [2021-11-09 09:39:36,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:39:36,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:39:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:39:36,960 INFO L87 Difference]: Start difference. First operand 1093 states and 1650 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 09:39:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:41,304 INFO L93 Difference]: Finished difference Result 2168 states and 3273 transitions. [2021-11-09 09:39:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:39:41,305 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 130 [2021-11-09 09:39:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:41,314 INFO L225 Difference]: With dead ends: 2168 [2021-11-09 09:39:41,315 INFO L226 Difference]: Without dead ends: 1271 [2021-11-09 09:39:41,316 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 09:39:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-09 09:39:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1183. [2021-11-09 09:39:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.5228426395939085) internal successors, (1800), 1182 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:39:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1800 transitions. [2021-11-09 09:39:41,364 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1800 transitions. Word has length 130 [2021-11-09 09:39:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:41,364 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1800 transitions. [2021-11-09 09:39:41,365 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 09:39:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1800 transitions. [2021-11-09 09:39:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-09 09:39:41,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:41,370 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 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, 1, 1, 1] [2021-11-09 09:39:41,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 09:39:41,370 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:39:41,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1808108170, now seen corresponding path program 2 times [2021-11-09 09:39:41,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:41,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466201338] [2021-11-09 09:39:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:41,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 125 proven. 24 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-09 09:39:41,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:41,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466201338] [2021-11-09 09:39:41,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466201338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426539074] [2021-11-09 09:39:41,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:39:41,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:41,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:41,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:41,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:40:44,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:40:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:40:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:44,845 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:40:44,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:40:44,869 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 225 treesize of output 177 [2021-11-09 09:40:44,880 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 177 treesize of output 129 [2021-11-09 09:40:45,203 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 9 treesize of output 3 [2021-11-09 09:40:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:40:45,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:40:45,600 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:40:45,601 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 49 treesize of output 19 [2021-11-09 09:40:45,736 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 09:40:45,985 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:40:45,985 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 09:40:46,088 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:40:46,089 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 09:40:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 116 proven. 74 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-09 09:40:46,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426539074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:46,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:46,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:40:46,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279345661] [2021-11-09 09:40:46,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:40:46,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:40:46,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:40:46,209 INFO L87 Difference]: Start difference. First operand 1183 states and 1800 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 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 09:40:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:57,862 INFO L93 Difference]: Finished difference Result 2976 states and 4499 transitions. [2021-11-09 09:40:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:40:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 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 144 [2021-11-09 09:40:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:57,876 INFO L225 Difference]: With dead ends: 2976 [2021-11-09 09:40:57,877 INFO L226 Difference]: Without dead ends: 1803 [2021-11-09 09:40:57,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:40:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-11-09 09:40:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1183. [2021-11-09 09:40:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.5084602368866329) internal successors, (1783), 1182 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1783 transitions. [2021-11-09 09:40:57,960 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1783 transitions. Word has length 144 [2021-11-09 09:40:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:57,960 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1783 transitions. [2021-11-09 09:40:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 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 09:40:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1783 transitions. [2021-11-09 09:40:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-09 09:40:57,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:57,968 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1] [2021-11-09 09:40:58,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:58,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:58,196 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1789452712, now seen corresponding path program 1 times [2021-11-09 09:40:58,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:58,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782629904] [2021-11-09 09:40:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:58,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 128 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-09 09:40:58,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:58,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782629904] [2021-11-09 09:40:58,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782629904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:58,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130424307] [2021-11-09 09:40:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:58,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:58,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:58,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:40:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:58,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:40:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:58,885 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:40:58,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:40:58,892 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 225 treesize of output 177 [2021-11-09 09:40:58,901 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 177 treesize of output 129 [2021-11-09 09:40:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:40:59,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-09 09:40:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:40:59,704 INFO L354 Elim1Store]: treesize reduction 7, result has 78.8 percent of original size [2021-11-09 09:40:59,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 45 [2021-11-09 09:41:00,040 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:00,041 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 49 treesize of output 19 [2021-11-09 09:41:00,145 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 09:41:00,384 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:41:00,385 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 09:41:00,515 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:00,516 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 09:41:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 119 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-09 09:41:00,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130424307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:00,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:00,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:41:00,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451967639] [2021-11-09 09:41:00,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:41:00,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:41:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:41:00,637 INFO L87 Difference]: Start difference. First operand 1183 states and 1783 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 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 09:41:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:16,495 INFO L93 Difference]: Finished difference Result 3031 states and 4526 transitions. [2021-11-09 09:41:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:41:16,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 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 144 [2021-11-09 09:41:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:16,509 INFO L225 Difference]: With dead ends: 3031 [2021-11-09 09:41:16,509 INFO L226 Difference]: Without dead ends: 1858 [2021-11-09 09:41:16,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:41:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-09 09:41:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1183. [2021-11-09 09:41:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.494077834179357) internal successors, (1766), 1182 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1766 transitions. [2021-11-09 09:41:16,585 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1766 transitions. Word has length 144 [2021-11-09 09:41:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:16,586 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1766 transitions. [2021-11-09 09:41:16,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 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 09:41:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1766 transitions. [2021-11-09 09:41:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:41:16,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:16,591 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1] [2021-11-09 09:41:16,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:16,812 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1465217311, now seen corresponding path program 1 times [2021-11-09 09:41:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:16,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359692915] [2021-11-09 09:41:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:16,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 133 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-09 09:41:16,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:16,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359692915] [2021-11-09 09:41:16,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359692915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:16,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023429448] [2021-11-09 09:41:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:17,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:17,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:17,001 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:17,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:41:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:41:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:17,530 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:41:17,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:41:17,552 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 225 treesize of output 177 [2021-11-09 09:41:17,558 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 177 treesize of output 129 [2021-11-09 09:41:17,744 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 9 treesize of output 3 [2021-11-09 09:41:17,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:41:18,058 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:18,059 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 49 treesize of output 19 [2021-11-09 09:41:18,154 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 09:41:18,360 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:41:18,360 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 09:41:18,470 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:18,471 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 09:41:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 09:41:18,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023429448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:18,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:18,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:41:18,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888635921] [2021-11-09 09:41:18,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:41:18,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:41:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:41:18,588 INFO L87 Difference]: Start difference. First operand 1183 states and 1766 transitions. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 09:41:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:32,256 INFO L93 Difference]: Finished difference Result 3030 states and 4485 transitions. [2021-11-09 09:41:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:41:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 145 [2021-11-09 09:41:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:32,270 INFO L225 Difference]: With dead ends: 3030 [2021-11-09 09:41:32,270 INFO L226 Difference]: Without dead ends: 1857 [2021-11-09 09:41:32,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:41:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-11-09 09:41:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1183. [2021-11-09 09:41:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.4796954314720812) internal successors, (1749), 1182 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1749 transitions. [2021-11-09 09:41:32,341 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1749 transitions. Word has length 145 [2021-11-09 09:41:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:32,342 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1749 transitions. [2021-11-09 09:41:32,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 09:41:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1749 transitions. [2021-11-09 09:41:32,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-09 09:41:32,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:32,347 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 4, 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, 1, 1, 1, 1] [2021-11-09 09:41:32,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:32,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:41:32,572 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1757854157, now seen corresponding path program 1 times [2021-11-09 09:41:32,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:32,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029041356] [2021-11-09 09:41:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:32,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 138 proven. 15 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-09 09:41:32,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:32,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029041356] [2021-11-09 09:41:32,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029041356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:32,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639567145] [2021-11-09 09:41:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:32,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:32,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:32,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:41:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:41:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:33,356 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:41:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:41:33,362 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 225 treesize of output 177 [2021-11-09 09:41:33,367 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 177 treesize of output 129 [2021-11-09 09:41:33,510 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 9 treesize of output 3 [2021-11-09 09:41:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:33,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:41:33,849 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:33,850 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 49 treesize of output 19 [2021-11-09 09:41:33,941 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 09:41:34,128 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:41:34,128 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 09:41:34,230 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:34,230 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 09:41:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 129 proven. 68 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-09 09:41:34,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639567145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:34,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:34,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:41:34,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588458073] [2021-11-09 09:41:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:41:34,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:41:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:41:34,319 INFO L87 Difference]: Start difference. First operand 1183 states and 1749 transitions. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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 09:41:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:47,975 INFO L93 Difference]: Finished difference Result 3031 states and 4446 transitions. [2021-11-09 09:41:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:41:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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 146 [2021-11-09 09:41:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:47,987 INFO L225 Difference]: With dead ends: 3031 [2021-11-09 09:41:47,988 INFO L226 Difference]: Without dead ends: 1858 [2021-11-09 09:41:47,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:41:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-09 09:41:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1183. [2021-11-09 09:41:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.4653130287648055) internal successors, (1732), 1182 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1732 transitions. [2021-11-09 09:41:48,068 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1732 transitions. Word has length 146 [2021-11-09 09:41:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:48,068 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1732 transitions. [2021-11-09 09:41:48,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 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 09:41:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1732 transitions. [2021-11-09 09:41:48,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-09 09:41:48,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:48,073 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 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, 1, 1, 1, 1] [2021-11-09 09:41:48,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:48,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:48,300 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -301305820, now seen corresponding path program 1 times [2021-11-09 09:41:48,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:48,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079593163] [2021-11-09 09:41:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:48,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 143 proven. 12 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-09 09:41:48,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079593163] [2021-11-09 09:41:48,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079593163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835200661] [2021-11-09 09:41:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:48,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:48,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:48,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:41:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:41:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:49,251 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:41:49,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:41:49,257 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 225 treesize of output 177 [2021-11-09 09:41:49,261 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 177 treesize of output 129 [2021-11-09 09:41:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:49,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:41:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:49,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:41:49,778 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:49,779 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 49 treesize of output 19 [2021-11-09 09:41:49,870 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 09:41:50,056 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:41:50,056 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 09:41:50,160 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:41:50,161 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 09:41:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 134 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-09 09:41:50,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835200661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:50,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:50,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:41:50,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302260177] [2021-11-09 09:41:50,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:41:50,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:50,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:41:50,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:41:50,263 INFO L87 Difference]: Start difference. First operand 1183 states and 1732 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 09:42:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:03,603 INFO L93 Difference]: Finished difference Result 2707 states and 3956 transitions. [2021-11-09 09:42:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:42:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 147 [2021-11-09 09:42:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:03,612 INFO L225 Difference]: With dead ends: 2707 [2021-11-09 09:42:03,612 INFO L226 Difference]: Without dead ends: 1534 [2021-11-09 09:42:03,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:42:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-11-09 09:42:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1050. [2021-11-09 09:42:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.4470924690181124) internal successors, (1518), 1049 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1518 transitions. [2021-11-09 09:42:03,663 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1518 transitions. Word has length 147 [2021-11-09 09:42:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:03,664 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1518 transitions. [2021-11-09 09:42:03,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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 09:42:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1518 transitions. [2021-11-09 09:42:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 09:42:03,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:03,669 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:03,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:03,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:03,885 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1616690902, now seen corresponding path program 1 times [2021-11-09 09:42:03,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:03,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523160677] [2021-11-09 09:42:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:03,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-09 09:42:04,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:04,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523160677] [2021-11-09 09:42:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523160677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:42:04,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:42:04,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:42:04,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232903796] [2021-11-09 09:42:04,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:42:04,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:42:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:42:04,079 INFO L87 Difference]: Start difference. First operand 1050 states and 1518 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 09:42:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:08,475 INFO L93 Difference]: Finished difference Result 2212 states and 3226 transitions. [2021-11-09 09:42:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:42:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 166 [2021-11-09 09:42:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:08,485 INFO L225 Difference]: With dead ends: 2212 [2021-11-09 09:42:08,485 INFO L226 Difference]: Without dead ends: 1356 [2021-11-09 09:42:08,487 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 09:42:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-11-09 09:42:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1055. [2021-11-09 09:42:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 1.4449715370018976) internal successors, (1523), 1054 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1523 transitions. [2021-11-09 09:42:08,536 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1523 transitions. Word has length 166 [2021-11-09 09:42:08,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:08,537 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1523 transitions. [2021-11-09 09:42:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 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 09:42:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1523 transitions. [2021-11-09 09:42:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-09 09:42:08,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:08,553 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 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, 1] [2021-11-09 09:42:08,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-09 09:42:08,553 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:08,554 INFO L85 PathProgramCache]: Analyzing trace with hash -769364368, now seen corresponding path program 1 times [2021-11-09 09:42:08,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:08,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208068981] [2021-11-09 09:42:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:08,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 326 proven. 6 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-09 09:42:08,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:08,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208068981] [2021-11-09 09:42:08,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208068981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:08,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997379836] [2021-11-09 09:42:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:08,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:08,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:08,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:42:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:42:09,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:09,348 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:42:09,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:42:09,353 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 225 treesize of output 177 [2021-11-09 09:42:09,356 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 177 treesize of output 129 [2021-11-09 09:42:09,553 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 9 treesize of output 3 [2021-11-09 09:42:09,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:42:09,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:42:09,857 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:42:09,858 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 49 treesize of output 19 [2021-11-09 09:42:10,076 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 09:42:10,138 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:42:10,138 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 09:42:10,241 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:42:10,241 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 09:42:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 317 proven. 61 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-09 09:42:10,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997379836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:10,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:10,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:42:10,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907878708] [2021-11-09 09:42:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:42:10,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:42:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:42:10,403 INFO L87 Difference]: Start difference. First operand 1055 states and 1523 transitions. Second operand has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 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 09:42:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:26,348 INFO L93 Difference]: Finished difference Result 2809 states and 4067 transitions. [2021-11-09 09:42:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:42:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 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 183 [2021-11-09 09:42:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:26,356 INFO L225 Difference]: With dead ends: 2809 [2021-11-09 09:42:26,356 INFO L226 Difference]: Without dead ends: 1949 [2021-11-09 09:42:26,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:42:26,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-11-09 09:42:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1135. [2021-11-09 09:42:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.4312169312169312) internal successors, (1623), 1134 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:42:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1623 transitions. [2021-11-09 09:42:26,437 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1623 transitions. Word has length 183 [2021-11-09 09:42:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:26,437 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1623 transitions. [2021-11-09 09:42:26,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.2) internal successors, (132), 10 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 09:42:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1623 transitions. [2021-11-09 09:42:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-09 09:42:26,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:26,442 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 5, 5, 3, 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] [2021-11-09 09:42:26,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:26,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:42:26,655 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:42:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash 361718375, now seen corresponding path program 2 times [2021-11-09 09:42:26,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:26,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387871747] [2021-11-09 09:42:26,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:26,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 330 proven. 5 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-09 09:42:26,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:26,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387871747] [2021-11-09 09:42:26,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387871747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:26,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886466388] [2021-11-09 09:42:26,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:42:26,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:26,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:26,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:44:26,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:44:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:44:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:27,096 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:44:27,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:44:27,108 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 225 treesize of output 177 [2021-11-09 09:44:27,111 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 177 treesize of output 129 [2021-11-09 09:44:27,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:44:27,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:44:27,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:44:27,547 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 09:44:27,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 10 [2021-11-09 09:44:27,700 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 9 treesize of output 3 [2021-11-09 09:44:27,992 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:44:27,993 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 49 treesize of output 19 [2021-11-09 09:44:28,211 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 09:44:28,300 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:44:28,300 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 09:44:28,436 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:44:28,437 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 09:44:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 322 proven. 60 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-09 09:44:28,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886466388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:28,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:28,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 10 [2021-11-09 09:44:28,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764780323] [2021-11-09 09:44:28,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:44:28,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:44:28,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:44:28,649 INFO L87 Difference]: Start difference. First operand 1135 states and 1623 transitions. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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 09:44:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:42,507 INFO L93 Difference]: Finished difference Result 2813 states and 4056 transitions. [2021-11-09 09:44:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:44:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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 184 [2021-11-09 09:44:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:42,514 INFO L225 Difference]: With dead ends: 2813 [2021-11-09 09:44:42,514 INFO L226 Difference]: Without dead ends: 1889 [2021-11-09 09:44:42,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:44:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2021-11-09 09:44:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1137. [2021-11-09 09:44:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.426056338028169) internal successors, (1620), 1136 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1620 transitions. [2021-11-09 09:44:42,576 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1620 transitions. Word has length 184 [2021-11-09 09:44:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:42,576 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1620 transitions. [2021-11-09 09:44:42,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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 09:44:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1620 transitions. [2021-11-09 09:44:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 09:44:42,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:42,581 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:42,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:42,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:42,795 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash 773838243, now seen corresponding path program 1 times [2021-11-09 09:44:42,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:42,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141632936] [2021-11-09 09:44:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:42,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-09 09:44:42,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:42,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141632936] [2021-11-09 09:44:42,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141632936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:44:42,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:44:42,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:44:42,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942765890] [2021-11-09 09:44:42,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:44:42,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:42,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:44:42,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:44:42,943 INFO L87 Difference]: Start difference. First operand 1137 states and 1620 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 09:44:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:47,280 INFO L93 Difference]: Finished difference Result 2375 states and 3391 transitions. [2021-11-09 09:44:47,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:44:47,281 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 201 [2021-11-09 09:44:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:47,283 INFO L225 Difference]: With dead ends: 2375 [2021-11-09 09:44:47,283 INFO L226 Difference]: Without dead ends: 1248 [2021-11-09 09:44:47,285 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 09:44:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-11-09 09:44:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1172. [2021-11-09 09:44:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.4389410760034158) internal successors, (1685), 1171 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:44:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1685 transitions. [2021-11-09 09:44:47,340 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1685 transitions. Word has length 201 [2021-11-09 09:44:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:47,341 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1685 transitions. [2021-11-09 09:44:47,341 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 09:44:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1685 transitions. [2021-11-09 09:44:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-09 09:44:47,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:47,346 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 5, 5, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:47,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-09 09:44:47,346 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1814594054, now seen corresponding path program 1 times [2021-11-09 09:44:47,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:47,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407007255] [2021-11-09 09:44:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:47,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 439 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-09 09:44:47,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:47,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407007255] [2021-11-09 09:44:47,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407007255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:47,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143914081] [2021-11-09 09:44:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:47,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:47,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:47,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:47,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:44:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:48,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:44:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:48,477 INFO L354 Elim1Store]: treesize reduction 234, result has 39.2 percent of original size [2021-11-09 09:44:48,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 308 treesize of output 225 [2021-11-09 09:44:48,483 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 225 treesize of output 177 [2021-11-09 09:44:48,488 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 177 treesize of output 129 [2021-11-09 09:44:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:44:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:44:48,657 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 9 treesize of output 3 [2021-11-09 09:44:48,898 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:44:48,899 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 49 treesize of output 19 [2021-11-09 09:44:49,333 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:44:49,334 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 09:44:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 123 proven. 99 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2021-11-09 09:44:49,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143914081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:49,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:49,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-09 09:44:49,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148742953] [2021-11-09 09:44:49,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:44:49,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:44:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:44:49,550 INFO L87 Difference]: Start difference. First operand 1172 states and 1685 transitions. Second operand has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:03,667 INFO L93 Difference]: Finished difference Result 3804 states and 5497 transitions. [2021-11-09 09:45:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:45:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 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 219 [2021-11-09 09:45:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:03,675 INFO L225 Difference]: With dead ends: 3804 [2021-11-09 09:45:03,676 INFO L226 Difference]: Without dead ends: 2642 [2021-11-09 09:45:03,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 217 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:45:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-11-09 09:45:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2132. [2021-11-09 09:45:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 1.4523697794462693) internal successors, (3095), 2131 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3095 transitions. [2021-11-09 09:45:03,797 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3095 transitions. Word has length 219 [2021-11-09 09:45:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:03,798 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3095 transitions. [2021-11-09 09:45:03,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3095 transitions. [2021-11-09 09:45:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-09 09:45:03,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:03,805 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 5, 5, 5, 4, 3, 3, 3, 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] [2021-11-09 09:45:03,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:04,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:45:04,022 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1325667924, now seen corresponding path program 1 times [2021-11-09 09:45:04,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:04,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604475513] [2021-11-09 09:45:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:04,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-11-09 09:45:04,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:04,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604475513] [2021-11-09 09:45:04,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604475513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:04,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:04,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:04,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997556303] [2021-11-09 09:45:04,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:04,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:04,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:04,344 INFO L87 Difference]: Start difference. First operand 2132 states and 3095 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:08,900 INFO L93 Difference]: Finished difference Result 4474 states and 6507 transitions. [2021-11-09 09:45:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:08,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 222 [2021-11-09 09:45:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:08,904 INFO L225 Difference]: With dead ends: 4474 [2021-11-09 09:45:08,904 INFO L226 Difference]: Without dead ends: 2352 [2021-11-09 09:45:08,906 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 09:45:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-11-09 09:45:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2132. [2021-11-09 09:45:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 1.4500234631628344) internal successors, (3090), 2131 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3090 transitions. [2021-11-09 09:45:08,999 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3090 transitions. Word has length 222 [2021-11-09 09:45:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:08,999 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3090 transitions. [2021-11-09 09:45:09,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3090 transitions. [2021-11-09 09:45:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-09 09:45:09,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:09,005 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:09,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-09 09:45:09,006 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2001484459, now seen corresponding path program 1 times [2021-11-09 09:45:09,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:09,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238549067] [2021-11-09 09:45:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:09,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 431 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-11-09 09:45:09,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:09,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238549067] [2021-11-09 09:45:09,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238549067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:09,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:09,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:09,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114044371] [2021-11-09 09:45:09,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:09,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:09,185 INFO L87 Difference]: Start difference. First operand 2132 states and 3090 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 09:45:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:13,580 INFO L93 Difference]: Finished difference Result 4694 states and 6780 transitions. [2021-11-09 09:45:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:13,580 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 225 [2021-11-09 09:45:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:13,586 INFO L225 Difference]: With dead ends: 4694 [2021-11-09 09:45:13,586 INFO L226 Difference]: Without dead ends: 2572 [2021-11-09 09:45:13,589 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 09:45:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-11-09 09:45:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2392. [2021-11-09 09:45:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 1.451275616896696) internal successors, (3470), 2391 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3470 transitions. [2021-11-09 09:45:13,658 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3470 transitions. Word has length 225 [2021-11-09 09:45:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:13,659 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 3470 transitions. [2021-11-09 09:45:13,659 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 09:45:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3470 transitions. [2021-11-09 09:45:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-09 09:45:13,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:13,676 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 3, 3, 3, 3, 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] [2021-11-09 09:45:13,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-09 09:45:13,676 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1287630054, now seen corresponding path program 1 times [2021-11-09 09:45:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:13,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993955172] [2021-11-09 09:45:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:13,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-09 09:45:13,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:13,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993955172] [2021-11-09 09:45:13,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993955172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:13,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:13,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:13,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448178512] [2021-11-09 09:45:13,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:13,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:13,800 INFO L87 Difference]: Start difference. First operand 2392 states and 3470 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:18,332 INFO L93 Difference]: Finished difference Result 4994 states and 7257 transitions. [2021-11-09 09:45:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 242 [2021-11-09 09:45:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:18,338 INFO L225 Difference]: With dead ends: 4994 [2021-11-09 09:45:18,338 INFO L226 Difference]: Without dead ends: 2612 [2021-11-09 09:45:18,341 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 09:45:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-11-09 09:45:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2392. [2021-11-09 09:45:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 1.4491844416562107) internal successors, (3465), 2391 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3465 transitions. [2021-11-09 09:45:18,459 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3465 transitions. Word has length 242 [2021-11-09 09:45:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:18,460 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 3465 transitions. [2021-11-09 09:45:18,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3465 transitions. [2021-11-09 09:45:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-09 09:45:18,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:18,468 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 3, 3, 3, 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] [2021-11-09 09:45:18,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-09 09:45:18,468 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1603222204, now seen corresponding path program 1 times [2021-11-09 09:45:18,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:18,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644352880] [2021-11-09 09:45:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:18,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-09 09:45:18,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:18,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644352880] [2021-11-09 09:45:18,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644352880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:18,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:18,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:18,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317627963] [2021-11-09 09:45:18,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:18,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:18,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:18,610 INFO L87 Difference]: Start difference. First operand 2392 states and 3465 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:23,142 INFO L93 Difference]: Finished difference Result 4979 states and 7229 transitions. [2021-11-09 09:45:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 244 [2021-11-09 09:45:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:23,149 INFO L225 Difference]: With dead ends: 4979 [2021-11-09 09:45:23,149 INFO L226 Difference]: Without dead ends: 2597 [2021-11-09 09:45:23,153 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 09:45:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-11-09 09:45:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2392. [2021-11-09 09:45:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 1.4470932664157257) internal successors, (3460), 2391 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3460 transitions. [2021-11-09 09:45:23,286 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3460 transitions. Word has length 244 [2021-11-09 09:45:23,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:23,286 INFO L470 AbstractCegarLoop]: Abstraction has 2392 states and 3460 transitions. [2021-11-09 09:45:23,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3460 transitions. [2021-11-09 09:45:23,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-09 09:45:23,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:23,293 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:23,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-09 09:45:23,294 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:23,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1165198897, now seen corresponding path program 1 times [2021-11-09 09:45:23,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:23,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060708449] [2021-11-09 09:45:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:23,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-09 09:45:23,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:23,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060708449] [2021-11-09 09:45:23,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060708449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:23,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:23,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:23,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952946012] [2021-11-09 09:45:23,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:23,482 INFO L87 Difference]: Start difference. First operand 2392 states and 3460 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 09:45:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:28,012 INFO L93 Difference]: Finished difference Result 4979 states and 7219 transitions. [2021-11-09 09:45:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:28,013 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 251 [2021-11-09 09:45:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:28,021 INFO L225 Difference]: With dead ends: 4979 [2021-11-09 09:45:28,021 INFO L226 Difference]: Without dead ends: 2597 [2021-11-09 09:45:28,024 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 09:45:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-11-09 09:45:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2397. [2021-11-09 09:45:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 1.4461602671118532) internal successors, (3465), 2396 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3465 transitions. [2021-11-09 09:45:28,156 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3465 transitions. Word has length 251 [2021-11-09 09:45:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:28,157 INFO L470 AbstractCegarLoop]: Abstraction has 2397 states and 3465 transitions. [2021-11-09 09:45:28,157 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 09:45:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3465 transitions. [2021-11-09 09:45:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-09 09:45:28,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:28,165 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 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] [2021-11-09 09:45:28,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-09 09:45:28,166 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash 92034317, now seen corresponding path program 1 times [2021-11-09 09:45:28,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:28,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645471335] [2021-11-09 09:45:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:28,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-09 09:45:28,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:28,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645471335] [2021-11-09 09:45:28,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645471335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:28,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:28,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:28,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902291287] [2021-11-09 09:45:28,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:28,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:28,350 INFO L87 Difference]: Start difference. First operand 2397 states and 3465 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 09:45:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:32,858 INFO L93 Difference]: Finished difference Result 4984 states and 7219 transitions. [2021-11-09 09:45:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:32,860 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 251 [2021-11-09 09:45:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:32,867 INFO L225 Difference]: With dead ends: 4984 [2021-11-09 09:45:32,867 INFO L226 Difference]: Without dead ends: 2597 [2021-11-09 09:45:32,870 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 09:45:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-11-09 09:45:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2407. [2021-11-09 09:45:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2406 states have (on average 1.4463840399002494) internal successors, (3480), 2406 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3480 transitions. [2021-11-09 09:45:32,972 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3480 transitions. Word has length 251 [2021-11-09 09:45:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:32,973 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3480 transitions. [2021-11-09 09:45:32,973 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 09:45:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3480 transitions. [2021-11-09 09:45:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-09 09:45:32,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:32,980 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:32,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-09 09:45:32,981 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1376248105, now seen corresponding path program 1 times [2021-11-09 09:45:32,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:32,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177258829] [2021-11-09 09:45:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:32,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-11-09 09:45:33,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:33,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177258829] [2021-11-09 09:45:33,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177258829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:33,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:33,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:33,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112169656] [2021-11-09 09:45:33,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:33,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:33,175 INFO L87 Difference]: Start difference. First operand 2407 states and 3480 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 09:45:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:37,692 INFO L93 Difference]: Finished difference Result 4979 states and 7209 transitions. [2021-11-09 09:45:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:37,693 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 253 [2021-11-09 09:45:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:37,698 INFO L225 Difference]: With dead ends: 4979 [2021-11-09 09:45:37,698 INFO L226 Difference]: Without dead ends: 2582 [2021-11-09 09:45:37,701 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 09:45:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-11-09 09:45:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2407. [2021-11-09 09:45:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2406 states have (on average 1.444305901911887) internal successors, (3475), 2406 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3475 transitions. [2021-11-09 09:45:37,829 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3475 transitions. Word has length 253 [2021-11-09 09:45:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:37,830 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3475 transitions. [2021-11-09 09:45:37,830 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 09:45:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3475 transitions. [2021-11-09 09:45:37,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-09 09:45:37,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:37,838 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-09 09:45:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-09 09:45:37,838 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1719151479, now seen corresponding path program 1 times [2021-11-09 09:45:37,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:37,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782126209] [2021-11-09 09:45:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:37,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-11-09 09:45:38,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:38,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782126209] [2021-11-09 09:45:38,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782126209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:38,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:38,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:38,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096837668] [2021-11-09 09:45:38,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:38,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:38,027 INFO L87 Difference]: Start difference. First operand 2407 states and 3475 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 09:45:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:42,550 INFO L93 Difference]: Finished difference Result 4979 states and 7199 transitions. [2021-11-09 09:45:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:42,550 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 253 [2021-11-09 09:45:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:42,553 INFO L225 Difference]: With dead ends: 4979 [2021-11-09 09:45:42,554 INFO L226 Difference]: Without dead ends: 2582 [2021-11-09 09:45:42,556 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 09:45:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-11-09 09:45:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2412. [2021-11-09 09:45:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 1.443384487764413) internal successors, (3480), 2411 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3480 transitions. [2021-11-09 09:45:42,697 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3480 transitions. Word has length 253 [2021-11-09 09:45:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:42,701 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 3480 transitions. [2021-11-09 09:45:42,701 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 09:45:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3480 transitions. [2021-11-09 09:45:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-09 09:45:42,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:42,707 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-09 09:45:42,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-09 09:45:42,708 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -74466109, now seen corresponding path program 1 times [2021-11-09 09:45:42,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:42,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191142845] [2021-11-09 09:45:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:42,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 394 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-09 09:45:42,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:42,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191142845] [2021-11-09 09:45:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191142845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:42,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:42,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:42,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100573246] [2021-11-09 09:45:42,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:42,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:42,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:42,853 INFO L87 Difference]: Start difference. First operand 2412 states and 3480 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:47,396 INFO L93 Difference]: Finished difference Result 4984 states and 7199 transitions. [2021-11-09 09:45:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 09:45:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:47,399 INFO L225 Difference]: With dead ends: 4984 [2021-11-09 09:45:47,399 INFO L226 Difference]: Without dead ends: 2582 [2021-11-09 09:45:47,402 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 09:45:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-11-09 09:45:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2417. [2021-11-09 09:45:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 1.4424668874172186) internal successors, (3485), 2416 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 3485 transitions. [2021-11-09 09:45:47,494 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 3485 transitions. Word has length 255 [2021-11-09 09:45:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:47,494 INFO L470 AbstractCegarLoop]: Abstraction has 2417 states and 3485 transitions. [2021-11-09 09:45:47,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 3485 transitions. [2021-11-09 09:45:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-09 09:45:47,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:47,499 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:45:47,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-09 09:45:47,499 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1724855767, now seen corresponding path program 1 times [2021-11-09 09:45:47,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:47,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388841336] [2021-11-09 09:45:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:47,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2021-11-09 09:45:47,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:47,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388841336] [2021-11-09 09:45:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388841336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:47,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:47,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331949394] [2021-11-09 09:45:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:47,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:47,629 INFO L87 Difference]: Start difference. First operand 2417 states and 3485 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:52,144 INFO L93 Difference]: Finished difference Result 4979 states and 7189 transitions. [2021-11-09 09:45:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 257 [2021-11-09 09:45:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:52,147 INFO L225 Difference]: With dead ends: 4979 [2021-11-09 09:45:52,147 INFO L226 Difference]: Without dead ends: 2572 [2021-11-09 09:45:52,150 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 09:45:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-11-09 09:45:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2422. [2021-11-09 09:45:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 1.4415530772408096) internal successors, (3490), 2421 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3490 transitions. [2021-11-09 09:45:52,250 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3490 transitions. Word has length 257 [2021-11-09 09:45:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:52,250 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 3490 transitions. [2021-11-09 09:45:52,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3490 transitions. [2021-11-09 09:45:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-09 09:45:52,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:52,258 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:52,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-09 09:45:52,259 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash 94961826, now seen corresponding path program 1 times [2021-11-09 09:45:52,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:52,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653864780] [2021-11-09 09:45:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:52,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-11-09 09:45:52,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:52,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653864780] [2021-11-09 09:45:52,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653864780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:52,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:52,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:52,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297404340] [2021-11-09 09:45:52,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:52,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:52,458 INFO L87 Difference]: Start difference. First operand 2422 states and 3490 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 09:45:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:56,890 INFO L93 Difference]: Finished difference Result 5324 states and 7650 transitions. [2021-11-09 09:45:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:45:56,891 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 261 [2021-11-09 09:45:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:56,894 INFO L225 Difference]: With dead ends: 5324 [2021-11-09 09:45:56,894 INFO L226 Difference]: Without dead ends: 2912 [2021-11-09 09:45:56,896 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 09:45:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-11-09 09:45:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2712. [2021-11-09 09:45:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 1.4459609000368867) internal successors, (3920), 2711 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:45:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3920 transitions. [2021-11-09 09:45:56,969 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3920 transitions. Word has length 261 [2021-11-09 09:45:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:56,969 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 3920 transitions. [2021-11-09 09:45:56,969 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 09:45:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3920 transitions. [2021-11-09 09:45:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-09 09:45:56,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:56,974 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:56,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-09 09:45:56,975 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash -334696480, now seen corresponding path program 1 times [2021-11-09 09:45:56,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:56,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365033700] [2021-11-09 09:45:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:56,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2021-11-09 09:45:57,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:57,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365033700] [2021-11-09 09:45:57,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365033700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:45:57,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:45:57,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:45:57,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078864526] [2021-11-09 09:45:57,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:45:57,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:45:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:45:57,167 INFO L87 Difference]: Start difference. First operand 2712 states and 3920 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:01,640 INFO L93 Difference]: Finished difference Result 5964 states and 8620 transitions. [2021-11-09 09:46:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:01,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 261 [2021-11-09 09:46:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:01,645 INFO L225 Difference]: With dead ends: 5964 [2021-11-09 09:46:01,645 INFO L226 Difference]: Without dead ends: 3262 [2021-11-09 09:46:01,648 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 09:46:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-11-09 09:46:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 3032. [2021-11-09 09:46:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 1.4582645991421972) internal successors, (4420), 3031 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4420 transitions. [2021-11-09 09:46:01,727 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4420 transitions. Word has length 261 [2021-11-09 09:46:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:01,727 INFO L470 AbstractCegarLoop]: Abstraction has 3032 states and 4420 transitions. [2021-11-09 09:46:01,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4420 transitions. [2021-11-09 09:46:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-09 09:46:01,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:01,732 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:01,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-09 09:46:01,733 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:01,733 INFO L85 PathProgramCache]: Analyzing trace with hash -39006031, now seen corresponding path program 1 times [2021-11-09 09:46:01,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:01,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114006866] [2021-11-09 09:46:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:01,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-09 09:46:01,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:01,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114006866] [2021-11-09 09:46:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114006866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:01,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:01,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417261432] [2021-11-09 09:46:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:01,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:01,906 INFO L87 Difference]: Start difference. First operand 3032 states and 4420 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 09:46:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:06,439 INFO L93 Difference]: Finished difference Result 6204 states and 9049 transitions. [2021-11-09 09:46:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:06,440 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 263 [2021-11-09 09:46:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:06,443 INFO L225 Difference]: With dead ends: 6204 [2021-11-09 09:46:06,443 INFO L226 Difference]: Without dead ends: 3182 [2021-11-09 09:46:06,446 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 09:46:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-11-09 09:46:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3037. [2021-11-09 09:46:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 1.4575098814229248) internal successors, (4425), 3036 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 4425 transitions. [2021-11-09 09:46:06,528 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 4425 transitions. Word has length 263 [2021-11-09 09:46:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:06,528 INFO L470 AbstractCegarLoop]: Abstraction has 3037 states and 4425 transitions. [2021-11-09 09:46:06,528 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 09:46:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 4425 transitions. [2021-11-09 09:46:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-09 09:46:06,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:06,533 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:06,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-09 09:46:06,534 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash 479790703, now seen corresponding path program 1 times [2021-11-09 09:46:06,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:06,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020321782] [2021-11-09 09:46:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:06,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-09 09:46:06,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:06,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020321782] [2021-11-09 09:46:06,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020321782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:06,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278773980] [2021-11-09 09:46:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:06,779 INFO L87 Difference]: Start difference. First operand 3037 states and 4425 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 09:46:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:11,287 INFO L93 Difference]: Finished difference Result 6209 states and 9049 transitions. [2021-11-09 09:46:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:11,288 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 263 [2021-11-09 09:46:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:11,291 INFO L225 Difference]: With dead ends: 6209 [2021-11-09 09:46:11,291 INFO L226 Difference]: Without dead ends: 3182 [2021-11-09 09:46:11,294 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 09:46:11,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-11-09 09:46:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3047. [2021-11-09 09:46:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3046 states have (on average 1.4576493762311227) internal successors, (4440), 3046 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4440 transitions. [2021-11-09 09:46:11,405 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4440 transitions. Word has length 263 [2021-11-09 09:46:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:11,406 INFO L470 AbstractCegarLoop]: Abstraction has 3047 states and 4440 transitions. [2021-11-09 09:46:11,406 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 09:46:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4440 transitions. [2021-11-09 09:46:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-09 09:46:11,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:11,412 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:11,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-09 09:46:11,413 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:11,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1601035465, now seen corresponding path program 1 times [2021-11-09 09:46:11,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:11,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868801325] [2021-11-09 09:46:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:11,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:46:11,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:11,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868801325] [2021-11-09 09:46:11,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868801325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:11,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:11,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:11,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502102676] [2021-11-09 09:46:11,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:11,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:11,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:11,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:11,560 INFO L87 Difference]: Start difference. First operand 3047 states and 4440 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 09:46:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:16,057 INFO L93 Difference]: Finished difference Result 6204 states and 9039 transitions. [2021-11-09 09:46:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:16,058 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 265 [2021-11-09 09:46:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:16,062 INFO L225 Difference]: With dead ends: 6204 [2021-11-09 09:46:16,063 INFO L226 Difference]: Without dead ends: 3167 [2021-11-09 09:46:16,066 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 09:46:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-11-09 09:46:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3047. [2021-11-09 09:46:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3046 states have (on average 1.4560078791858175) internal successors, (4435), 3046 states have internal predecessors, (4435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 4435 transitions. [2021-11-09 09:46:16,191 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 4435 transitions. Word has length 265 [2021-11-09 09:46:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:16,191 INFO L470 AbstractCegarLoop]: Abstraction has 3047 states and 4435 transitions. [2021-11-09 09:46:16,191 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 09:46:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 4435 transitions. [2021-11-09 09:46:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-09 09:46:16,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:16,197 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:16,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-09 09:46:16,197 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1302538473, now seen corresponding path program 1 times [2021-11-09 09:46:16,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:16,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304577708] [2021-11-09 09:46:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:16,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:46:16,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:16,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304577708] [2021-11-09 09:46:16,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304577708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:16,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:16,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:16,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621217178] [2021-11-09 09:46:16,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:16,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:16,340 INFO L87 Difference]: Start difference. First operand 3047 states and 4435 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 09:46:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:20,814 INFO L93 Difference]: Finished difference Result 6194 states and 9019 transitions. [2021-11-09 09:46:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:20,814 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 265 [2021-11-09 09:46:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:20,818 INFO L225 Difference]: With dead ends: 6194 [2021-11-09 09:46:20,818 INFO L226 Difference]: Without dead ends: 3157 [2021-11-09 09:46:20,822 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 09:46:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-11-09 09:46:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3052. [2021-11-09 09:46:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 1.455260570304818) internal successors, (4440), 3051 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 4440 transitions. [2021-11-09 09:46:20,905 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 4440 transitions. Word has length 265 [2021-11-09 09:46:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:20,906 INFO L470 AbstractCegarLoop]: Abstraction has 3052 states and 4440 transitions. [2021-11-09 09:46:20,906 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 09:46:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 4440 transitions. [2021-11-09 09:46:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-09 09:46:20,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:20,912 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:20,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-09 09:46:20,912 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash -123745468, now seen corresponding path program 1 times [2021-11-09 09:46:20,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:20,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212900117] [2021-11-09 09:46:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:20,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-09 09:46:21,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:21,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212900117] [2021-11-09 09:46:21,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212900117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:21,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:21,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:21,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837857236] [2021-11-09 09:46:21,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:21,117 INFO L87 Difference]: Start difference. First operand 3052 states and 4440 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 09:46:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:25,584 INFO L93 Difference]: Finished difference Result 6199 states and 9019 transitions. [2021-11-09 09:46:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:25,585 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 272 [2021-11-09 09:46:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:25,588 INFO L225 Difference]: With dead ends: 6199 [2021-11-09 09:46:25,589 INFO L226 Difference]: Without dead ends: 3157 [2021-11-09 09:46:25,592 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 09:46:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-11-09 09:46:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3057. [2021-11-09 09:46:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 1.4545157068062826) internal successors, (4445), 3056 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4445 transitions. [2021-11-09 09:46:25,672 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4445 transitions. Word has length 272 [2021-11-09 09:46:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:25,672 INFO L470 AbstractCegarLoop]: Abstraction has 3057 states and 4445 transitions. [2021-11-09 09:46:25,672 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 09:46:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4445 transitions. [2021-11-09 09:46:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-09 09:46:25,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:25,677 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:25,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-09 09:46:25,677 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1528727669, now seen corresponding path program 1 times [2021-11-09 09:46:25,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:25,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852368076] [2021-11-09 09:46:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:25,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 407 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-09 09:46:25,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:25,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852368076] [2021-11-09 09:46:25,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852368076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:25,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:25,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:25,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749238027] [2021-11-09 09:46:25,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:25,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:25,801 INFO L87 Difference]: Start difference. First operand 3057 states and 4445 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 09:46:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:30,274 INFO L93 Difference]: Finished difference Result 6194 states and 9009 transitions. [2021-11-09 09:46:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:30,275 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 275 [2021-11-09 09:46:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:30,278 INFO L225 Difference]: With dead ends: 6194 [2021-11-09 09:46:30,278 INFO L226 Difference]: Without dead ends: 3147 [2021-11-09 09:46:30,280 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 09:46:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-11-09 09:46:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3062. [2021-11-09 09:46:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 1.4537732767069584) internal successors, (4450), 3061 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 4450 transitions. [2021-11-09 09:46:30,362 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 4450 transitions. Word has length 275 [2021-11-09 09:46:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:30,363 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 4450 transitions. [2021-11-09 09:46:30,363 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 09:46:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 4450 transitions. [2021-11-09 09:46:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-09 09:46:30,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:30,366 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:30,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-11-09 09:46:30,367 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1550334722, now seen corresponding path program 1 times [2021-11-09 09:46:30,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:30,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872545521] [2021-11-09 09:46:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:30,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2021-11-09 09:46:30,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:30,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872545521] [2021-11-09 09:46:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872545521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:30,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:30,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758068543] [2021-11-09 09:46:30,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:30,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:30,502 INFO L87 Difference]: Start difference. First operand 3062 states and 4450 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 09:46:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:34,950 INFO L93 Difference]: Finished difference Result 6199 states and 9009 transitions. [2021-11-09 09:46:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:34,951 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 275 [2021-11-09 09:46:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:34,954 INFO L225 Difference]: With dead ends: 6199 [2021-11-09 09:46:34,954 INFO L226 Difference]: Without dead ends: 3147 [2021-11-09 09:46:34,957 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 09:46:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-11-09 09:46:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3067. [2021-11-09 09:46:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 1.4530332681017613) internal successors, (4455), 3066 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 4455 transitions. [2021-11-09 09:46:35,064 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 4455 transitions. Word has length 275 [2021-11-09 09:46:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 4455 transitions. [2021-11-09 09:46:35,064 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 09:46:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 4455 transitions. [2021-11-09 09:46:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-09 09:46:35,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:35,070 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:35,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-11-09 09:46:35,071 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1993671665, now seen corresponding path program 1 times [2021-11-09 09:46:35,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:35,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229752148] [2021-11-09 09:46:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:35,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-09 09:46:35,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:35,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229752148] [2021-11-09 09:46:35,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229752148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:35,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:35,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:35,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746960610] [2021-11-09 09:46:35,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:35,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:35,245 INFO L87 Difference]: Start difference. First operand 3067 states and 4455 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 09:46:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:39,704 INFO L93 Difference]: Finished difference Result 6194 states and 8999 transitions. [2021-11-09 09:46:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:39,704 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 278 [2021-11-09 09:46:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:39,708 INFO L225 Difference]: With dead ends: 6194 [2021-11-09 09:46:39,708 INFO L226 Difference]: Without dead ends: 3137 [2021-11-09 09:46:39,710 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 09:46:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-11-09 09:46:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 3072. [2021-11-09 09:46:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3071 states have (on average 1.452295669163139) internal successors, (4460), 3071 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 4460 transitions. [2021-11-09 09:46:39,790 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 4460 transitions. Word has length 278 [2021-11-09 09:46:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:39,791 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 4460 transitions. [2021-11-09 09:46:39,791 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 09:46:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 4460 transitions. [2021-11-09 09:46:39,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-09 09:46:39,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:39,795 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:39,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-11-09 09:46:39,796 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:39,797 INFO L85 PathProgramCache]: Analyzing trace with hash -972650857, now seen corresponding path program 1 times [2021-11-09 09:46:39,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:39,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183279021] [2021-11-09 09:46:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:39,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-11-09 09:46:39,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:39,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183279021] [2021-11-09 09:46:39,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183279021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:39,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:39,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:39,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416672097] [2021-11-09 09:46:39,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:39,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:39,932 INFO L87 Difference]: Start difference. First operand 3072 states and 4460 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:44,495 INFO L93 Difference]: Finished difference Result 6894 states and 10020 transitions. [2021-11-09 09:46:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 09:46:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:44,500 INFO L225 Difference]: With dead ends: 6894 [2021-11-09 09:46:44,501 INFO L226 Difference]: Without dead ends: 3832 [2021-11-09 09:46:44,503 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 09:46:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-11-09 09:46:44,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 3282. [2021-11-09 09:46:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3281 states have (on average 1.4446814995428223) internal successors, (4740), 3281 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 4740 transitions. [2021-11-09 09:46:44,662 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 4740 transitions. Word has length 281 [2021-11-09 09:46:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:44,663 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 4740 transitions. [2021-11-09 09:46:44,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 4740 transitions. [2021-11-09 09:46:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-09 09:46:44,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:44,671 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:44,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-11-09 09:46:44,671 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1041194521, now seen corresponding path program 1 times [2021-11-09 09:46:44,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:44,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344346279] [2021-11-09 09:46:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:44,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 413 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-09 09:46:44,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:44,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344346279] [2021-11-09 09:46:44,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344346279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:44,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:44,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:46:44,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026363587] [2021-11-09 09:46:44,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:46:44,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:46:44,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:46:44,857 INFO L87 Difference]: Start difference. First operand 3282 states and 4740 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 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 09:46:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:51,799 INFO L93 Difference]: Finished difference Result 8011 states and 11597 transitions. [2021-11-09 09:46:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:46:51,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 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 281 [2021-11-09 09:46:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:51,806 INFO L225 Difference]: With dead ends: 8011 [2021-11-09 09:46:51,806 INFO L226 Difference]: Without dead ends: 4739 [2021-11-09 09:46:51,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 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 09:46:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-11-09 09:46:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4657. [2021-11-09 09:46:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 1.4540378006872852) internal successors, (6770), 4656 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 6770 transitions. [2021-11-09 09:46:51,978 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 6770 transitions. Word has length 281 [2021-11-09 09:46:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:51,978 INFO L470 AbstractCegarLoop]: Abstraction has 4657 states and 6770 transitions. [2021-11-09 09:46:51,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 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 09:46:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 6770 transitions. [2021-11-09 09:46:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-09 09:46:51,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:51,983 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:46:51,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-11-09 09:46:51,984 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:51,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:51,984 INFO L85 PathProgramCache]: Analyzing trace with hash 150568505, now seen corresponding path program 1 times [2021-11-09 09:46:51,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:51,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631826487] [2021-11-09 09:46:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:51,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 413 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-09 09:46:52,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:52,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631826487] [2021-11-09 09:46:52,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631826487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:52,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:52,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:52,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860801104] [2021-11-09 09:46:52,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:52,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:52,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:52,120 INFO L87 Difference]: Start difference. First operand 4657 states and 6770 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 09:46:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:56,618 INFO L93 Difference]: Finished difference Result 9344 states and 13574 transitions. [2021-11-09 09:46:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:46:56,619 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 281 [2021-11-09 09:46:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:56,623 INFO L225 Difference]: With dead ends: 9344 [2021-11-09 09:46:56,623 INFO L226 Difference]: Without dead ends: 4697 [2021-11-09 09:46:56,625 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 09:46:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4697 states. [2021-11-09 09:46:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4697 to 4662. [2021-11-09 09:46:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 1.4535507401845098) internal successors, (6775), 4661 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:46:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 6775 transitions. [2021-11-09 09:46:56,790 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 6775 transitions. Word has length 281 [2021-11-09 09:46:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:56,790 INFO L470 AbstractCegarLoop]: Abstraction has 4662 states and 6775 transitions. [2021-11-09 09:46:56,790 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 09:46:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 6775 transitions. [2021-11-09 09:46:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-09 09:46:56,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:56,796 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-11-09 09:46:56,796 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1288152597, now seen corresponding path program 1 times [2021-11-09 09:46:56,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:56,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664352377] [2021-11-09 09:46:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:56,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 719 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2021-11-09 09:46:56,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:56,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664352377] [2021-11-09 09:46:56,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664352377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:46:56,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:46:56,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:46:56,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347906865] [2021-11-09 09:46:56,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:46:56,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:46:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:46:56,963 INFO L87 Difference]: Start difference. First operand 4662 states and 6775 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 09:47:01,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:01,501 INFO L93 Difference]: Finished difference Result 10098 states and 14674 transitions. [2021-11-09 09:47:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:47:01,502 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 299 [2021-11-09 09:47:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:01,509 INFO L225 Difference]: With dead ends: 10098 [2021-11-09 09:47:01,509 INFO L226 Difference]: Without dead ends: 5446 [2021-11-09 09:47:01,512 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 09:47:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-11-09 09:47:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5077. [2021-11-09 09:47:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5077 states, 5076 states have (on average 1.4676910953506699) internal successors, (7450), 5076 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:47:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5077 states to 5077 states and 7450 transitions. [2021-11-09 09:47:01,657 INFO L78 Accepts]: Start accepts. Automaton has 5077 states and 7450 transitions. Word has length 299 [2021-11-09 09:47:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:01,657 INFO L470 AbstractCegarLoop]: Abstraction has 5077 states and 7450 transitions. [2021-11-09 09:47:01,657 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 09:47:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5077 states and 7450 transitions. [2021-11-09 09:47:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-09 09:47:01,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:01,663 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:01,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-11-09 09:47:01,664 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1651619095, now seen corresponding path program 1 times [2021-11-09 09:47:01,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:01,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950962609] [2021-11-09 09:47:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:01,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 546 proven. 238 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-09 09:47:03,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:03,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950962609] [2021-11-09 09:47:03,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950962609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:03,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285851608] [2021-11-09 09:47:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:03,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:03,747 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:03,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a82eb00b-89d6-44a7-a863-b71dbd285543/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:47:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 09:47:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26504 treesize of output 24316 [2021-11-09 09:47:06,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 32 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 33 new quantified variables, introduced 0 case distinctions, treesize of input 47819 treesize of output 32939 [2021-11-09 09:48:00,573 WARN L207 SmtUtils]: Spent 53.85 s on a formula simplification. DAG size of input: 96 DAG size of output: 28 [2021-11-09 09:48:00,574 INFO L354 Elim1Store]: treesize reduction 486, result has 8.3 percent of original size [2021-11-09 09:48:00,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 1631915 treesize of output 1631128 [2021-11-09 09:48:02,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815459 treesize of output 1741649 [2021-11-09 09:48:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815452 treesize of output 1741644 [2021-11-09 09:48:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815445 treesize of output 1741639 [2021-11-09 09:48:05,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815438 treesize of output 1741634 [2021-11-09 09:48:06,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815431 treesize of output 1741629 [2021-11-09 09:48:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815424 treesize of output 1741624 [2021-11-09 09:48:09,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815417 treesize of output 1741619 [2021-11-09 09:48:10,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815410 treesize of output 1741614 [2021-11-09 09:48:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815403 treesize of output 1741609 [2021-11-09 09:48:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815396 treesize of output 1741604 [2021-11-09 09:48:13,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815389 treesize of output 1741599 [2021-11-09 09:48:14,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815382 treesize of output 1741594 [2021-11-09 09:48:15,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815375 treesize of output 1741589 [2021-11-09 09:48:16,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815368 treesize of output 1741584 [2021-11-09 09:48:17,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815361 treesize of output 1741579 [2021-11-09 09:48:18,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1815354 treesize of output 1741574 [2021-11-09 09:48:19,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815347 treesize of output 1741569 [2021-11-09 09:48:20,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1815340 treesize of output 1741564 [2021-11-09 09:48:21,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815333 treesize of output 1741559 [2021-11-09 09:48:22,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 1815326 treesize of output 1741554 [2021-11-09 09:48:42,549 WARN L207 SmtUtils]: Spent 18.70 s on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2021-11-09 09:48:42,550 INFO L354 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2021-11-09 09:48:42,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 2974487 treesize of output 2827035 [2021-11-09 09:48:45,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 3269461 treesize of output 3195727