./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU --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 e951bfa557af694cc1e8699e574c7b4724d1be498cab6731e1080e9fedb61dc3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:19:49,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:19:49,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:19:49,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:19:49,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:19:49,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:19:49,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:19:49,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:19:49,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:19:49,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:19:49,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:19:49,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:19:49,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:19:49,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:19:49,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:19:49,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:19:49,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:19:49,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:19:49,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:19:49,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:19:49,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:19:49,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:19:49,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:19:49,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:19:49,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:19:49,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:19:49,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:19:49,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:19:49,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:19:49,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:19:49,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:19:49,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:19:49,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:19:49,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:19:49,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:19:49,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:19:49,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:19:49,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:19:49,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:19:49,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:19:49,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:19:49,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:19:49,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:19:49,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:19:49,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:19:49,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:19:49,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:19:49,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:19:49,590 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:19:49,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:19:49,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:19:49,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:19:49,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:19:49,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:19:49,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:19:49,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:19:49,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:19:49,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:19:49,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:19:49,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:19:49,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:19:49,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:19:49,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:19:49,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:19:49,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:19:49,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:19:49,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:19:49,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:19:49,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:19:49,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:19:49,596 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:19:49,596 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:19:49,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:19:49,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:19:49,596 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_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e951bfa557af694cc1e8699e574c7b4724d1be498cab6731e1080e9fedb61dc3 [2021-11-02 23:19:49,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:19:50,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:19:50,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:19:50,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:19:50,007 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:19:50,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c [2021-11-02 23:19:50,101 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/2cbfe5229/ea8eb47f3b4844a7b9a042a1f63629e8/FLAG5be04575d [2021-11-02 23:19:50,942 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:19:50,943 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c [2021-11-02 23:19:50,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/2cbfe5229/ea8eb47f3b4844a7b9a042a1f63629e8/FLAG5be04575d [2021-11-02 23:19:51,119 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/2cbfe5229/ea8eb47f3b4844a7b9a042a1f63629e8 [2021-11-02 23:19:51,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:19:51,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:19:51,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:19:51,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:19:51,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:19:51,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:19:51" (1/1) ... [2021-11-02 23:19:51,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b28f97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:51, skipping insertion in model container [2021-11-02 23:19:51,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:19:51" (1/1) ... [2021-11-02 23:19:51,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:19:51,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:19:51,802 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_d7489b7d-ca80-423a-886a-ce4f1906e52e/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c[74353,74366] [2021-11-02 23:19:51,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:19:51,849 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:19:52,069 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_d7489b7d-ca80-423a-886a-ce4f1906e52e/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c[74353,74366] [2021-11-02 23:19:52,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:19:52,093 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:19:52,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52 WrapperNode [2021-11-02 23:19:52,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:19:52,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:19:52,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:19:52,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:19:52,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:19:52,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:19:52,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:19:52,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:19:52,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:19:52,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:19:52,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:19:52,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:19:52,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (1/1) ... [2021-11-02 23:19:52,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:19:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:52,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:19:52,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:19:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:19:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:19:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:19:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:19:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:19:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:19:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:19:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:19:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:19:52,760 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 23:19:54,399 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-02 23:19:54,400 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-02 23:19:54,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:19:54,411 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-02 23:19:54,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:19:54 BoogieIcfgContainer [2021-11-02 23:19:54,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:19:54,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:19:54,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:19:54,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:19:54,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:19:51" (1/3) ... [2021-11-02 23:19:54,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3aa0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:19:54, skipping insertion in model container [2021-11-02 23:19:54,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:19:52" (2/3) ... [2021-11-02 23:19:54,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3aa0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:19:54, skipping insertion in model container [2021-11-02 23:19:54,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:19:54" (3/3) ... [2021-11-02 23:19:54,425 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-2.c [2021-11-02 23:19:54,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:19:54,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:19:54,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:19:54,503 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 [2021-11-02 23:19:54,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:19:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:19:54,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:54,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:54,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-02 23:19:54,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:54,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135943515] [2021-11-02 23:19:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:54,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:55,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:55,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135943515] [2021-11-02 23:19:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135943515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:55,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:55,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:19:55,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951463686] [2021-11-02 23:19:55,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:19:55,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:19:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:19:55,211 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:57,907 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2021-11-02 23:19:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:19:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-02 23:19:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:57,926 INFO L225 Difference]: With dead ends: 325 [2021-11-02 23:19:57,927 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 23:19:57,932 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 [2021-11-02 23:19:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 23:19:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-11-02 23:19:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 147 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2021-11-02 23:19:58,006 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 37 [2021-11-02 23:19:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:58,007 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2021-11-02 23:19:58,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2021-11-02 23:19:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:19:58,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:58,010 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:58,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:19:58,011 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1650885502, now seen corresponding path program 1 times [2021-11-02 23:19:58,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:58,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523699738] [2021-11-02 23:19:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:58,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:19:58,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:58,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523699738] [2021-11-02 23:19:58,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523699738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:19:58,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:19:58,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:19:58,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771275905] [2021-11-02 23:19:58,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:19:58,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:19:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:19:58,175 INFO L87 Difference]: Start difference. First operand 148 states and 229 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:00,257 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-11-02 23:20:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-02 23:20:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:00,260 INFO L225 Difference]: With dead ends: 292 [2021-11-02 23:20:00,260 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 23:20:00,262 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 [2021-11-02 23:20:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 23:20:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-11-02 23:20:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-11-02 23:20:00,276 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 50 [2021-11-02 23:20:00,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:00,277 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-11-02 23:20:00,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-11-02 23:20:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:20:00,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:00,281 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:00,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:20:00,281 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:00,282 INFO L85 PathProgramCache]: Analyzing trace with hash -24642669, now seen corresponding path program 1 times [2021-11-02 23:20:00,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:00,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460177636] [2021-11-02 23:20:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:00,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:00,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:00,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460177636] [2021-11-02 23:20:00,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460177636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:00,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:00,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:00,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120529116] [2021-11-02 23:20:00,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:00,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:00,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:00,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:00,423 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:02,901 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-11-02 23:20:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:02,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-02 23:20:02,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:02,904 INFO L225 Difference]: With dead ends: 291 [2021-11-02 23:20:02,905 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 23:20:02,906 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 [2021-11-02 23:20:02,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 23:20:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-11-02 23:20:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5442176870748299) internal successors, (227), 147 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 227 transitions. [2021-11-02 23:20:02,933 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 227 transitions. Word has length 51 [2021-11-02 23:20:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:02,934 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 227 transitions. [2021-11-02 23:20:02,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 227 transitions. [2021-11-02 23:20:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:20:02,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:02,940 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:02,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:20:02,941 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash 840936487, now seen corresponding path program 1 times [2021-11-02 23:20:02,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:02,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322989611] [2021-11-02 23:20:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:02,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:03,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:03,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322989611] [2021-11-02 23:20:03,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322989611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:03,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:03,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:03,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155590082] [2021-11-02 23:20:03,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:03,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:03,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:03,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:03,092 INFO L87 Difference]: Start difference. First operand 148 states and 227 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:05,543 INFO L93 Difference]: Finished difference Result 291 states and 443 transitions. [2021-11-02 23:20:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-02 23:20:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:05,545 INFO L225 Difference]: With dead ends: 291 [2021-11-02 23:20:05,545 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 23:20:05,546 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 [2021-11-02 23:20:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 23:20:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-11-02 23:20:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 226 transitions. [2021-11-02 23:20:05,556 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 226 transitions. Word has length 51 [2021-11-02 23:20:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:05,556 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 226 transitions. [2021-11-02 23:20:05,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 226 transitions. [2021-11-02 23:20:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:20:05,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:05,559 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:05,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:20:05,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash 451751422, now seen corresponding path program 1 times [2021-11-02 23:20:05,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:05,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809083235] [2021-11-02 23:20:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:05,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:05,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:05,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809083235] [2021-11-02 23:20:05,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809083235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:05,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:05,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:05,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122249935] [2021-11-02 23:20:05,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:05,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:05,644 INFO L87 Difference]: Start difference. First operand 148 states and 226 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:06,798 INFO L93 Difference]: Finished difference Result 290 states and 441 transitions. [2021-11-02 23:20:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:06,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-02 23:20:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:06,801 INFO L225 Difference]: With dead ends: 290 [2021-11-02 23:20:06,801 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 23:20:06,802 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 [2021-11-02 23:20:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 23:20:06,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2021-11-02 23:20:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.530612244897959) internal successors, (225), 147 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 225 transitions. [2021-11-02 23:20:06,812 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 225 transitions. Word has length 51 [2021-11-02 23:20:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:06,813 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 225 transitions. [2021-11-02 23:20:06,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 225 transitions. [2021-11-02 23:20:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:20:06,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:06,817 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:06,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:20:06,817 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -88394050, now seen corresponding path program 1 times [2021-11-02 23:20:06,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:06,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757185502] [2021-11-02 23:20:06,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:06,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:06,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:06,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757185502] [2021-11-02 23:20:06,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757185502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:06,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:06,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:06,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935398089] [2021-11-02 23:20:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:06,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:06,925 INFO L87 Difference]: Start difference. First operand 148 states and 225 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:08,609 INFO L93 Difference]: Finished difference Result 288 states and 438 transitions. [2021-11-02 23:20:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 51 [2021-11-02 23:20:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:08,611 INFO L225 Difference]: With dead ends: 288 [2021-11-02 23:20:08,611 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:20:08,612 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 [2021-11-02 23:20:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:20:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-02 23:20:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5238095238095237) internal successors, (224), 147 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 224 transitions. [2021-11-02 23:20:08,619 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 224 transitions. Word has length 51 [2021-11-02 23:20:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:08,619 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 224 transitions. [2021-11-02 23:20:08,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2021-11-02 23:20:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 224 transitions. [2021-11-02 23:20:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:20:08,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:08,622 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:08,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:20:08,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:08,623 INFO L85 PathProgramCache]: Analyzing trace with hash -388419541, now seen corresponding path program 1 times [2021-11-02 23:20:08,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:08,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084466128] [2021-11-02 23:20:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:08,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:08,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:08,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084466128] [2021-11-02 23:20:08,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084466128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:08,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:08,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:08,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563555326] [2021-11-02 23:20:08,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:08,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:08,702 INFO L87 Difference]: Start difference. First operand 148 states and 224 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:10,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:10,020 INFO L93 Difference]: Finished difference Result 288 states and 437 transitions. [2021-11-02 23:20:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:20:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:10,024 INFO L225 Difference]: With dead ends: 288 [2021-11-02 23:20:10,024 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:20:10,025 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 [2021-11-02 23:20:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:20:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-02 23:20:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5170068027210883) internal successors, (223), 147 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 223 transitions. [2021-11-02 23:20:10,030 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 223 transitions. Word has length 52 [2021-11-02 23:20:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:10,031 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 223 transitions. [2021-11-02 23:20:10,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 223 transitions. [2021-11-02 23:20:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:20:10,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:10,032 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:10,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:20:10,033 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash -162201364, now seen corresponding path program 1 times [2021-11-02 23:20:10,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:10,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150502926] [2021-11-02 23:20:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:10,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:10,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:10,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150502926] [2021-11-02 23:20:10,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150502926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:10,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:10,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:10,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365487735] [2021-11-02 23:20:10,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:10,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:10,184 INFO L87 Difference]: Start difference. First operand 148 states and 223 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:11,604 INFO L93 Difference]: Finished difference Result 288 states and 436 transitions. [2021-11-02 23:20:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:11,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:20:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:11,607 INFO L225 Difference]: With dead ends: 288 [2021-11-02 23:20:11,608 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:20:11,608 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 [2021-11-02 23:20:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:20:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-02 23:20:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.510204081632653) internal successors, (222), 147 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 222 transitions. [2021-11-02 23:20:11,615 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 222 transitions. Word has length 53 [2021-11-02 23:20:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:11,616 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 222 transitions. [2021-11-02 23:20:11,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 222 transitions. [2021-11-02 23:20:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:20:11,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:11,618 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:11,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:20:11,619 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2057823088, now seen corresponding path program 1 times [2021-11-02 23:20:11,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:11,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863412019] [2021-11-02 23:20:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:11,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:11,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:11,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863412019] [2021-11-02 23:20:11,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863412019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:11,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:11,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:11,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41283083] [2021-11-02 23:20:11,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:11,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:11,700 INFO L87 Difference]: Start difference. First operand 148 states and 222 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:14,048 INFO L93 Difference]: Finished difference Result 278 states and 422 transitions. [2021-11-02 23:20:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 23:20:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:14,050 INFO L225 Difference]: With dead ends: 278 [2021-11-02 23:20:14,050 INFO L226 Difference]: Without dead ends: 151 [2021-11-02 23:20:14,051 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 [2021-11-02 23:20:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-02 23:20:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-02 23:20:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5034013605442176) internal successors, (221), 147 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 221 transitions. [2021-11-02 23:20:14,058 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 221 transitions. Word has length 54 [2021-11-02 23:20:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:14,058 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 221 transitions. [2021-11-02 23:20:14,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 221 transitions. [2021-11-02 23:20:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:20:14,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:14,060 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:14,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:20:14,060 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1297584632, now seen corresponding path program 1 times [2021-11-02 23:20:14,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759198670] [2021-11-02 23:20:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:14,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:14,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:14,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759198670] [2021-11-02 23:20:14,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759198670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:14,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:14,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:14,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73246328] [2021-11-02 23:20:14,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:14,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:14,134 INFO L87 Difference]: Start difference. First operand 148 states and 221 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:15,572 INFO L93 Difference]: Finished difference Result 318 states and 483 transitions. [2021-11-02 23:20:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 23:20:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:15,574 INFO L225 Difference]: With dead ends: 318 [2021-11-02 23:20:15,575 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:20:15,575 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 [2021-11-02 23:20:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:20:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-11-02 23:20:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.532544378698225) internal successors, (259), 169 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 259 transitions. [2021-11-02 23:20:15,582 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 259 transitions. Word has length 54 [2021-11-02 23:20:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:15,583 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 259 transitions. [2021-11-02 23:20:15,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 259 transitions. [2021-11-02 23:20:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:20:15,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:15,584 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:20:15,585 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1819095073, now seen corresponding path program 1 times [2021-11-02 23:20:15,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:15,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305629452] [2021-11-02 23:20:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:15,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:15,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:15,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305629452] [2021-11-02 23:20:15,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305629452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:15,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:15,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:15,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109101713] [2021-11-02 23:20:15,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:15,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:15,656 INFO L87 Difference]: Start difference. First operand 170 states and 259 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2021-11-02 23:20:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:17,507 INFO L93 Difference]: Finished difference Result 340 states and 520 transitions. [2021-11-02 23:20:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:20:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:17,509 INFO L225 Difference]: With dead ends: 340 [2021-11-02 23:20:17,509 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:20:17,510 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 [2021-11-02 23:20:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:20:17,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-11-02 23:20:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5266272189349113) internal successors, (258), 169 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 258 transitions. [2021-11-02 23:20:17,517 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 258 transitions. Word has length 67 [2021-11-02 23:20:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:17,517 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 258 transitions. [2021-11-02 23:20:17,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2021-11-02 23:20:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 258 transitions. [2021-11-02 23:20:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:20:17,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:17,519 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:17,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:20:17,520 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash 170572756, now seen corresponding path program 1 times [2021-11-02 23:20:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:17,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192056616] [2021-11-02 23:20:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:17,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:17,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:17,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192056616] [2021-11-02 23:20:17,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192056616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:17,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:17,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:17,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639686535] [2021-11-02 23:20:17,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:17,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:17,587 INFO L87 Difference]: Start difference. First operand 170 states and 258 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:18,579 INFO L93 Difference]: Finished difference Result 339 states and 517 transitions. [2021-11-02 23:20:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:18,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:20:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:18,581 INFO L225 Difference]: With dead ends: 339 [2021-11-02 23:20:18,582 INFO L226 Difference]: Without dead ends: 190 [2021-11-02 23:20:18,582 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 [2021-11-02 23:20:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-02 23:20:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2021-11-02 23:20:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5207100591715976) internal successors, (257), 169 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 257 transitions. [2021-11-02 23:20:18,590 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 257 transitions. Word has length 68 [2021-11-02 23:20:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 257 transitions. [2021-11-02 23:20:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 257 transitions. [2021-11-02 23:20:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:20:18,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:18,593 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:18,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:20:18,593 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1036151912, now seen corresponding path program 1 times [2021-11-02 23:20:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:18,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432685881] [2021-11-02 23:20:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:18,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:18,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:18,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432685881] [2021-11-02 23:20:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432685881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:18,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:18,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456637807] [2021-11-02 23:20:18,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:18,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:18,660 INFO L87 Difference]: Start difference. First operand 170 states and 257 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:21,081 INFO L93 Difference]: Finished difference Result 339 states and 515 transitions. [2021-11-02 23:20:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:20:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:21,084 INFO L225 Difference]: With dead ends: 339 [2021-11-02 23:20:21,084 INFO L226 Difference]: Without dead ends: 190 [2021-11-02 23:20:21,085 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 [2021-11-02 23:20:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-02 23:20:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2021-11-02 23:20:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.514792899408284) internal successors, (256), 169 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 256 transitions. [2021-11-02 23:20:21,093 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 256 transitions. Word has length 68 [2021-11-02 23:20:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:21,094 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 256 transitions. [2021-11-02 23:20:21,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 256 transitions. [2021-11-02 23:20:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:20:21,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:21,096 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:21,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:20:21,096 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 646966847, now seen corresponding path program 1 times [2021-11-02 23:20:21,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:21,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689887128] [2021-11-02 23:20:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:21,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:21,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:21,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689887128] [2021-11-02 23:20:21,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689887128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:21,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:21,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:21,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648259370] [2021-11-02 23:20:21,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:21,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:21,205 INFO L87 Difference]: Start difference. First operand 170 states and 256 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:22,231 INFO L93 Difference]: Finished difference Result 338 states and 512 transitions. [2021-11-02 23:20:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:22,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:20:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:22,233 INFO L225 Difference]: With dead ends: 338 [2021-11-02 23:20:22,233 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 23:20:22,234 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 [2021-11-02 23:20:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 23:20:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2021-11-02 23:20:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 169 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2021-11-02 23:20:22,241 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 68 [2021-11-02 23:20:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:22,241 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2021-11-02 23:20:22,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2021-11-02 23:20:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:20:22,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:22,243 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:22,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:20:22,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash 106821375, now seen corresponding path program 1 times [2021-11-02 23:20:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:22,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367376175] [2021-11-02 23:20:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:22,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:22,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:22,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367376175] [2021-11-02 23:20:22,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367376175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:22,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:22,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:22,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215044102] [2021-11-02 23:20:22,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:22,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:22,311 INFO L87 Difference]: Start difference. First operand 170 states and 255 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:23,926 INFO L93 Difference]: Finished difference Result 336 states and 508 transitions. [2021-11-02 23:20:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:20:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:23,928 INFO L225 Difference]: With dead ends: 336 [2021-11-02 23:20:23,929 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 23:20:23,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 23:20:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-11-02 23:20:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5029585798816567) internal successors, (254), 169 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2021-11-02 23:20:23,936 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 68 [2021-11-02 23:20:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:23,936 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2021-11-02 23:20:23,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2021-11-02 23:20:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 23:20:23,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:23,938 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:23,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:20:23,938 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1368291338, now seen corresponding path program 1 times [2021-11-02 23:20:23,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:23,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286522481] [2021-11-02 23:20:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:23,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:24,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:24,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286522481] [2021-11-02 23:20:24,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286522481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:24,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:24,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:24,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742320184] [2021-11-02 23:20:24,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:24,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:24,014 INFO L87 Difference]: Start difference. First operand 170 states and 254 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:25,164 INFO L93 Difference]: Finished difference Result 336 states and 506 transitions. [2021-11-02 23:20:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:25,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 23:20:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:25,167 INFO L225 Difference]: With dead ends: 336 [2021-11-02 23:20:25,167 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 23:20:25,168 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 [2021-11-02 23:20:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 23:20:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-11-02 23:20:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4970414201183433) internal successors, (253), 169 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 253 transitions. [2021-11-02 23:20:25,178 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 253 transitions. Word has length 69 [2021-11-02 23:20:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:25,178 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 253 transitions. [2021-11-02 23:20:25,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 253 transitions. [2021-11-02 23:20:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 23:20:25,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:25,180 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:25,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:20:25,181 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1538738963, now seen corresponding path program 1 times [2021-11-02 23:20:25,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:25,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382280832] [2021-11-02 23:20:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:25,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:25,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:25,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382280832] [2021-11-02 23:20:25,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382280832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:25,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:25,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:25,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543972276] [2021-11-02 23:20:25,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:25,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:25,290 INFO L87 Difference]: Start difference. First operand 170 states and 253 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:26,046 INFO L93 Difference]: Finished difference Result 336 states and 504 transitions. [2021-11-02 23:20:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:26,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-02 23:20:26,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:26,049 INFO L225 Difference]: With dead ends: 336 [2021-11-02 23:20:26,049 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 23:20:26,049 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 [2021-11-02 23:20:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 23:20:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-11-02 23:20:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.4911242603550297) internal successors, (252), 169 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 252 transitions. [2021-11-02 23:20:26,057 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 252 transitions. Word has length 70 [2021-11-02 23:20:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:26,057 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 252 transitions. [2021-11-02 23:20:26,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 252 transitions. [2021-11-02 23:20:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:20:26,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:26,059 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:26,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:20:26,059 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1780815697, now seen corresponding path program 1 times [2021-11-02 23:20:26,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:26,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460938340] [2021-11-02 23:20:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:26,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:20:26,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:26,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460938340] [2021-11-02 23:20:26,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460938340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:26,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:26,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:26,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690701237] [2021-11-02 23:20:26,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:26,131 INFO L87 Difference]: Start difference. First operand 170 states and 252 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:27,440 INFO L93 Difference]: Finished difference Result 326 states and 489 transitions. [2021-11-02 23:20:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 23:20:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:27,442 INFO L225 Difference]: With dead ends: 326 [2021-11-02 23:20:27,442 INFO L226 Difference]: Without dead ends: 177 [2021-11-02 23:20:27,443 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 [2021-11-02 23:20:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-02 23:20:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2021-11-02 23:20:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.485207100591716) internal successors, (251), 169 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 251 transitions. [2021-11-02 23:20:27,449 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 251 transitions. Word has length 71 [2021-11-02 23:20:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:27,450 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 251 transitions. [2021-11-02 23:20:27,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 251 transitions. [2021-11-02 23:20:27,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:20:27,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:27,452 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:27,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:20:27,452 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:27,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2072838766, now seen corresponding path program 1 times [2021-11-02 23:20:27,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:27,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706057251] [2021-11-02 23:20:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:27,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:27,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:27,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706057251] [2021-11-02 23:20:27,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706057251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:27,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:27,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:27,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923165328] [2021-11-02 23:20:27,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:27,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:27,561 INFO L87 Difference]: Start difference. First operand 170 states and 251 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:30,106 INFO L93 Difference]: Finished difference Result 426 states and 642 transitions. [2021-11-02 23:20:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 23:20:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:30,109 INFO L225 Difference]: With dead ends: 426 [2021-11-02 23:20:30,110 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 23:20:30,110 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 [2021-11-02 23:20:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 23:20:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 200. [2021-11-02 23:20:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.5226130653266332) internal successors, (303), 199 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 303 transitions. [2021-11-02 23:20:30,120 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 303 transitions. Word has length 76 [2021-11-02 23:20:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:30,120 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 303 transitions. [2021-11-02 23:20:30,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 303 transitions. [2021-11-02 23:20:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:20:30,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:30,122 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:30,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:20:30,123 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2000452208, now seen corresponding path program 1 times [2021-11-02 23:20:30,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:30,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164498247] [2021-11-02 23:20:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:30,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:30,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:30,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164498247] [2021-11-02 23:20:30,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164498247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:30,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:30,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:30,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429975745] [2021-11-02 23:20:30,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:30,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:30,206 INFO L87 Difference]: Start difference. First operand 200 states and 303 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:32,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:32,067 INFO L93 Difference]: Finished difference Result 429 states and 658 transitions. [2021-11-02 23:20:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:32,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-02 23:20:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:32,070 INFO L225 Difference]: With dead ends: 429 [2021-11-02 23:20:32,070 INFO L226 Difference]: Without dead ends: 250 [2021-11-02 23:20:32,071 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 [2021-11-02 23:20:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-02 23:20:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 224. [2021-11-02 23:20:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.547085201793722) internal successors, (345), 223 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 345 transitions. [2021-11-02 23:20:32,080 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 345 transitions. Word has length 76 [2021-11-02 23:20:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:32,081 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 345 transitions. [2021-11-02 23:20:32,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 345 transitions. [2021-11-02 23:20:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:20:32,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:32,083 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:32,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:20:32,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2072837020, now seen corresponding path program 1 times [2021-11-02 23:20:32,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:32,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333489107] [2021-11-02 23:20:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:32,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:32,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:32,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333489107] [2021-11-02 23:20:32,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333489107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:32,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:32,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:32,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717566065] [2021-11-02 23:20:32,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:32,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:32,180 INFO L87 Difference]: Start difference. First operand 224 states and 345 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2021-11-02 23:20:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:34,648 INFO L93 Difference]: Finished difference Result 496 states and 764 transitions. [2021-11-02 23:20:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:34,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 77 [2021-11-02 23:20:34,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:34,652 INFO L225 Difference]: With dead ends: 496 [2021-11-02 23:20:34,652 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 23:20:34,653 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 [2021-11-02 23:20:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 23:20:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 225. [2021-11-02 23:20:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5446428571428572) internal successors, (346), 224 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 346 transitions. [2021-11-02 23:20:34,663 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 346 transitions. Word has length 77 [2021-11-02 23:20:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:34,664 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 346 transitions. [2021-11-02 23:20:34,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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) [2021-11-02 23:20:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 346 transitions. [2021-11-02 23:20:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:20:34,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:34,666 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:34,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 23:20:34,667 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 700513709, now seen corresponding path program 1 times [2021-11-02 23:20:34,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:34,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763805881] [2021-11-02 23:20:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:34,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:34,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:34,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763805881] [2021-11-02 23:20:34,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763805881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:34,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:34,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:34,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159973722] [2021-11-02 23:20:34,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:34,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:34,780 INFO L87 Difference]: Start difference. First operand 225 states and 346 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:37,233 INFO L93 Difference]: Finished difference Result 497 states and 764 transitions. [2021-11-02 23:20:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:37,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 23:20:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:37,237 INFO L225 Difference]: With dead ends: 497 [2021-11-02 23:20:37,237 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 23:20:37,238 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 [2021-11-02 23:20:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 23:20:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 235. [2021-11-02 23:20:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5598290598290598) internal successors, (365), 234 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 365 transitions. [2021-11-02 23:20:37,247 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 365 transitions. Word has length 82 [2021-11-02 23:20:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:37,248 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 365 transitions. [2021-11-02 23:20:37,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 365 transitions. [2021-11-02 23:20:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 23:20:37,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:37,250 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:37,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:20:37,250 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash 233723934, now seen corresponding path program 1 times [2021-11-02 23:20:37,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:37,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248497481] [2021-11-02 23:20:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:37,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:37,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:37,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248497481] [2021-11-02 23:20:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248497481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:37,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:37,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:37,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373703796] [2021-11-02 23:20:37,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:37,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:37,330 INFO L87 Difference]: Start difference. First operand 235 states and 365 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) [2021-11-02 23:20:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:39,829 INFO L93 Difference]: Finished difference Result 501 states and 775 transitions. [2021-11-02 23:20:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:39,831 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 83 [2021-11-02 23:20:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:39,834 INFO L225 Difference]: With dead ends: 501 [2021-11-02 23:20:39,834 INFO L226 Difference]: Without dead ends: 287 [2021-11-02 23:20:39,835 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 [2021-11-02 23:20:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-02 23:20:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 236. [2021-11-02 23:20:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5574468085106383) internal successors, (366), 235 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 366 transitions. [2021-11-02 23:20:39,844 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 366 transitions. Word has length 83 [2021-11-02 23:20:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:39,844 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 366 transitions. [2021-11-02 23:20:39,845 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) [2021-11-02 23:20:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 366 transitions. [2021-11-02 23:20:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:20:39,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:39,846 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:39,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 23:20:39,847 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -523718805, now seen corresponding path program 1 times [2021-11-02 23:20:39,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:39,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341680439] [2021-11-02 23:20:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:39,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:39,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:39,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341680439] [2021-11-02 23:20:39,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341680439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:39,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:39,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:39,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071211491] [2021-11-02 23:20:39,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:39,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:39,960 INFO L87 Difference]: Start difference. First operand 236 states and 366 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:42,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:42,401 INFO L93 Difference]: Finished difference Result 502 states and 775 transitions. [2021-11-02 23:20:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:42,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 23:20:42,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:42,404 INFO L225 Difference]: With dead ends: 502 [2021-11-02 23:20:42,404 INFO L226 Difference]: Without dead ends: 287 [2021-11-02 23:20:42,405 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 [2021-11-02 23:20:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-02 23:20:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 236. [2021-11-02 23:20:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.553191489361702) internal successors, (365), 235 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 365 transitions. [2021-11-02 23:20:42,414 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 365 transitions. Word has length 89 [2021-11-02 23:20:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:42,414 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 365 transitions. [2021-11-02 23:20:42,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 365 transitions. [2021-11-02 23:20:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:20:42,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:42,417 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:42,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 23:20:42,417 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1404553897, now seen corresponding path program 1 times [2021-11-02 23:20:42,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:42,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099799705] [2021-11-02 23:20:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:42,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:42,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:42,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099799705] [2021-11-02 23:20:42,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099799705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:42,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:42,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:42,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784083805] [2021-11-02 23:20:42,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:42,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:42,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:42,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:42,496 INFO L87 Difference]: Start difference. First operand 236 states and 365 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:43,706 INFO L93 Difference]: Finished difference Result 477 states and 739 transitions. [2021-11-02 23:20:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 23:20:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:43,709 INFO L225 Difference]: With dead ends: 477 [2021-11-02 23:20:43,709 INFO L226 Difference]: Without dead ends: 262 [2021-11-02 23:20:43,710 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 [2021-11-02 23:20:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-02 23:20:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 236. [2021-11-02 23:20:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.548936170212766) internal successors, (364), 235 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 364 transitions. [2021-11-02 23:20:43,718 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 364 transitions. Word has length 89 [2021-11-02 23:20:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:43,719 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 364 transitions. [2021-11-02 23:20:43,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 364 transitions. [2021-11-02 23:20:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:20:43,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:43,721 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:43,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 23:20:43,722 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:43,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash 557786570, now seen corresponding path program 1 times [2021-11-02 23:20:43,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:43,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522326260] [2021-11-02 23:20:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:43,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:43,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:43,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522326260] [2021-11-02 23:20:43,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522326260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:43,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:43,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:43,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515340441] [2021-11-02 23:20:43,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:43,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:43,810 INFO L87 Difference]: Start difference. First operand 236 states and 364 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) [2021-11-02 23:20:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:46,212 INFO L93 Difference]: Finished difference Result 501 states and 770 transitions. [2021-11-02 23:20:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:46,213 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 90 [2021-11-02 23:20:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:46,214 INFO L225 Difference]: With dead ends: 501 [2021-11-02 23:20:46,215 INFO L226 Difference]: Without dead ends: 286 [2021-11-02 23:20:46,215 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 [2021-11-02 23:20:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-02 23:20:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 236. [2021-11-02 23:20:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5446808510638297) internal successors, (363), 235 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 363 transitions. [2021-11-02 23:20:46,224 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 363 transitions. Word has length 90 [2021-11-02 23:20:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:46,224 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 363 transitions. [2021-11-02 23:20:46,224 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) [2021-11-02 23:20:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 363 transitions. [2021-11-02 23:20:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:20:46,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:46,226 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:46,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-02 23:20:46,227 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1423365726, now seen corresponding path program 1 times [2021-11-02 23:20:46,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:46,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426072858] [2021-11-02 23:20:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:46,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 23:20:46,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426072858] [2021-11-02 23:20:46,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426072858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:46,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:46,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:20:46,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584251196] [2021-11-02 23:20:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:20:46,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:20:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:20:46,324 INFO L87 Difference]: Start difference. First operand 236 states and 363 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2021-11-02 23:20:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:50,072 INFO L93 Difference]: Finished difference Result 472 states and 731 transitions. [2021-11-02 23:20:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:20:50,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 90 [2021-11-02 23:20:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:50,074 INFO L225 Difference]: With dead ends: 472 [2021-11-02 23:20:50,074 INFO L226 Difference]: Without dead ends: 257 [2021-11-02 23:20:50,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:20:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-02 23:20:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-11-02 23:20:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5254901960784313) internal successors, (389), 255 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 389 transitions. [2021-11-02 23:20:50,085 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 389 transitions. Word has length 90 [2021-11-02 23:20:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:50,086 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 389 transitions. [2021-11-02 23:20:50,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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) [2021-11-02 23:20:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 389 transitions. [2021-11-02 23:20:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:20:50,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:50,088 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:50,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-02 23:20:50,089 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1034180661, now seen corresponding path program 1 times [2021-11-02 23:20:50,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:50,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720992865] [2021-11-02 23:20:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:50,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:50,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:50,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720992865] [2021-11-02 23:20:50,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720992865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:50,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:50,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:50,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360766797] [2021-11-02 23:20:50,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:50,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:50,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:50,174 INFO L87 Difference]: Start difference. First operand 256 states and 389 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) [2021-11-02 23:20:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:52,580 INFO L93 Difference]: Finished difference Result 540 states and 818 transitions. [2021-11-02 23:20:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:52,581 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 90 [2021-11-02 23:20:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:52,583 INFO L225 Difference]: With dead ends: 540 [2021-11-02 23:20:52,583 INFO L226 Difference]: Without dead ends: 305 [2021-11-02 23:20:52,584 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 [2021-11-02 23:20:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-02 23:20:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 256. [2021-11-02 23:20:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5215686274509803) internal successors, (388), 255 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 388 transitions. [2021-11-02 23:20:52,595 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 388 transitions. Word has length 90 [2021-11-02 23:20:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:52,595 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 388 transitions. [2021-11-02 23:20:52,595 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) [2021-11-02 23:20:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 388 transitions. [2021-11-02 23:20:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:20:52,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:52,597 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:52,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 23:20:52,598 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash 494035189, now seen corresponding path program 1 times [2021-11-02 23:20:52,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:52,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972841542] [2021-11-02 23:20:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:52,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:52,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:52,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972841542] [2021-11-02 23:20:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972841542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:52,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:52,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:52,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125683845] [2021-11-02 23:20:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:52,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:52,689 INFO L87 Difference]: Start difference. First operand 256 states and 388 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) [2021-11-02 23:20:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:55,134 INFO L93 Difference]: Finished difference Result 538 states and 814 transitions. [2021-11-02 23:20:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:55,135 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 90 [2021-11-02 23:20:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:55,137 INFO L225 Difference]: With dead ends: 538 [2021-11-02 23:20:55,137 INFO L226 Difference]: Without dead ends: 303 [2021-11-02 23:20:55,138 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 [2021-11-02 23:20:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-02 23:20:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 256. [2021-11-02 23:20:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5176470588235293) internal successors, (387), 255 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 387 transitions. [2021-11-02 23:20:55,148 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 387 transitions. Word has length 90 [2021-11-02 23:20:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:55,149 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 387 transitions. [2021-11-02 23:20:55,149 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) [2021-11-02 23:20:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 387 transitions. [2021-11-02 23:20:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:20:55,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:55,151 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:55,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-02 23:20:55,151 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash 681092279, now seen corresponding path program 1 times [2021-11-02 23:20:55,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:55,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268112439] [2021-11-02 23:20:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:55,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:55,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:55,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268112439] [2021-11-02 23:20:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268112439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:55,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:55,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:55,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91393909] [2021-11-02 23:20:55,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:55,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:55,234 INFO L87 Difference]: Start difference. First operand 256 states and 387 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) [2021-11-02 23:20:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:56,925 INFO L93 Difference]: Finished difference Result 515 states and 780 transitions. [2021-11-02 23:20:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:56,926 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 90 [2021-11-02 23:20:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:56,927 INFO L225 Difference]: With dead ends: 515 [2021-11-02 23:20:56,927 INFO L226 Difference]: Without dead ends: 280 [2021-11-02 23:20:56,928 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 [2021-11-02 23:20:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-02 23:20:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 256. [2021-11-02 23:20:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5137254901960784) internal successors, (386), 255 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 386 transitions. [2021-11-02 23:20:56,938 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 386 transitions. Word has length 90 [2021-11-02 23:20:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:56,939 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 386 transitions. [2021-11-02 23:20:56,939 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) [2021-11-02 23:20:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 386 transitions. [2021-11-02 23:20:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-02 23:20:56,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:56,941 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:56,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-02 23:20:56,941 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:56,942 INFO L85 PathProgramCache]: Analyzing trace with hash 140946807, now seen corresponding path program 1 times [2021-11-02 23:20:56,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:56,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957381141] [2021-11-02 23:20:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:56,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:57,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:57,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957381141] [2021-11-02 23:20:57,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957381141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:57,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:57,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322527254] [2021-11-02 23:20:57,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:57,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:57,046 INFO L87 Difference]: Start difference. First operand 256 states and 386 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) [2021-11-02 23:20:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:58,393 INFO L93 Difference]: Finished difference Result 513 states and 776 transitions. [2021-11-02 23:20:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:20:58,393 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 90 [2021-11-02 23:20:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:58,395 INFO L225 Difference]: With dead ends: 513 [2021-11-02 23:20:58,395 INFO L226 Difference]: Without dead ends: 278 [2021-11-02 23:20:58,395 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 [2021-11-02 23:20:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-02 23:20:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-02 23:20:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5098039215686274) internal successors, (385), 255 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2021-11-02 23:20:58,403 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 90 [2021-11-02 23:20:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:58,404 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2021-11-02 23:20:58,404 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) [2021-11-02 23:20:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2021-11-02 23:20:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 23:20:58,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:58,405 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:58,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-02 23:20:58,406 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 618167687, now seen corresponding path program 1 times [2021-11-02 23:20:58,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:58,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154117514] [2021-11-02 23:20:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:58,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:20:58,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:58,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154117514] [2021-11-02 23:20:58,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154117514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:20:58,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:20:58,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:20:58,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334942225] [2021-11-02 23:20:58,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:20:58,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:20:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:20:58,477 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:00,938 INFO L93 Difference]: Finished difference Result 538 states and 808 transitions. [2021-11-02 23:21:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-02 23:21:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:00,941 INFO L225 Difference]: With dead ends: 538 [2021-11-02 23:21:00,942 INFO L226 Difference]: Without dead ends: 303 [2021-11-02 23:21:00,942 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 [2021-11-02 23:21:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-02 23:21:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 256. [2021-11-02 23:21:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5058823529411764) internal successors, (384), 255 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 384 transitions. [2021-11-02 23:21:00,953 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 384 transitions. Word has length 91 [2021-11-02 23:21:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:00,954 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 384 transitions. [2021-11-02 23:21:00,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 384 transitions. [2021-11-02 23:21:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 23:21:00,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:00,956 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:00,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-02 23:21:00,957 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1737637563, now seen corresponding path program 1 times [2021-11-02 23:21:00,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:00,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413725944] [2021-11-02 23:21:00,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:00,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:01,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:01,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413725944] [2021-11-02 23:21:01,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413725944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:01,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:01,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:01,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994723004] [2021-11-02 23:21:01,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:01,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:01,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:01,056 INFO L87 Difference]: Start difference. First operand 256 states and 384 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:03,501 INFO L93 Difference]: Finished difference Result 513 states and 772 transitions. [2021-11-02 23:21:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-02 23:21:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:03,505 INFO L225 Difference]: With dead ends: 513 [2021-11-02 23:21:03,505 INFO L226 Difference]: Without dead ends: 278 [2021-11-02 23:21:03,505 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 [2021-11-02 23:21:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-02 23:21:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-02 23:21:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5019607843137255) internal successors, (383), 255 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2021-11-02 23:21:03,516 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 91 [2021-11-02 23:21:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:03,516 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2021-11-02 23:21:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2021-11-02 23:21:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 23:21:03,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:03,519 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-02 23:21:03,519 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:03,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1656149457, now seen corresponding path program 1 times [2021-11-02 23:21:03,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:03,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181552411] [2021-11-02 23:21:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:03,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:03,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:03,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181552411] [2021-11-02 23:21:03,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181552411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:03,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:03,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:03,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920729819] [2021-11-02 23:21:03,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:03,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:03,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:03,602 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:06,042 INFO L93 Difference]: Finished difference Result 538 states and 804 transitions. [2021-11-02 23:21:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-02 23:21:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:06,045 INFO L225 Difference]: With dead ends: 538 [2021-11-02 23:21:06,046 INFO L226 Difference]: Without dead ends: 303 [2021-11-02 23:21:06,046 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 [2021-11-02 23:21:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-02 23:21:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 256. [2021-11-02 23:21:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4980392156862745) internal successors, (382), 255 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 382 transitions. [2021-11-02 23:21:06,056 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 382 transitions. Word has length 92 [2021-11-02 23:21:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:06,056 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 382 transitions. [2021-11-02 23:21:06,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 382 transitions. [2021-11-02 23:21:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 23:21:06,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:06,058 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:06,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-02 23:21:06,059 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:06,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1640630739, now seen corresponding path program 1 times [2021-11-02 23:21:06,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:06,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330452779] [2021-11-02 23:21:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:06,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:06,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:06,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330452779] [2021-11-02 23:21:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330452779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:06,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945675475] [2021-11-02 23:21:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:06,136 INFO L87 Difference]: Start difference. First operand 256 states and 382 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:07,569 INFO L93 Difference]: Finished difference Result 513 states and 768 transitions. [2021-11-02 23:21:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-02 23:21:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:07,576 INFO L225 Difference]: With dead ends: 513 [2021-11-02 23:21:07,576 INFO L226 Difference]: Without dead ends: 278 [2021-11-02 23:21:07,577 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 [2021-11-02 23:21:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-02 23:21:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-02 23:21:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4941176470588236) internal successors, (381), 255 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 381 transitions. [2021-11-02 23:21:07,588 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 381 transitions. Word has length 92 [2021-11-02 23:21:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:07,588 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 381 transitions. [2021-11-02 23:21:07,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 381 transitions. [2021-11-02 23:21:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-02 23:21:07,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:07,590 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:07,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-02 23:21:07,591 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1808188638, now seen corresponding path program 1 times [2021-11-02 23:21:07,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:07,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021059412] [2021-11-02 23:21:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:07,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:07,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:07,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021059412] [2021-11-02 23:21:07,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021059412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:07,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:07,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:07,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224165110] [2021-11-02 23:21:07,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:07,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:07,708 INFO L87 Difference]: Start difference. First operand 256 states and 381 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:10,123 INFO L93 Difference]: Finished difference Result 538 states and 800 transitions. [2021-11-02 23:21:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:10,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-02 23:21:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:10,125 INFO L225 Difference]: With dead ends: 538 [2021-11-02 23:21:10,125 INFO L226 Difference]: Without dead ends: 303 [2021-11-02 23:21:10,126 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 [2021-11-02 23:21:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-02 23:21:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 256. [2021-11-02 23:21:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4901960784313726) internal successors, (380), 255 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 380 transitions. [2021-11-02 23:21:10,136 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 380 transitions. Word has length 93 [2021-11-02 23:21:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:10,137 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 380 transitions. [2021-11-02 23:21:10,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 380 transitions. [2021-11-02 23:21:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-02 23:21:10,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:10,139 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:10,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-02 23:21:10,139 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:10,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2005698400, now seen corresponding path program 1 times [2021-11-02 23:21:10,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:10,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130329239] [2021-11-02 23:21:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:10,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:10,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:10,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130329239] [2021-11-02 23:21:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130329239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:10,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:10,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:10,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105032442] [2021-11-02 23:21:10,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:10,213 INFO L87 Difference]: Start difference. First operand 256 states and 380 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:12,572 INFO L93 Difference]: Finished difference Result 513 states and 764 transitions. [2021-11-02 23:21:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:12,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-02 23:21:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:12,574 INFO L225 Difference]: With dead ends: 513 [2021-11-02 23:21:12,574 INFO L226 Difference]: Without dead ends: 278 [2021-11-02 23:21:12,574 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 [2021-11-02 23:21:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-02 23:21:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 256. [2021-11-02 23:21:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4862745098039216) internal successors, (379), 255 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2021-11-02 23:21:12,584 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 93 [2021-11-02 23:21:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:12,585 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2021-11-02 23:21:12,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2021-11-02 23:21:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:21:12,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:12,587 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:12,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-02 23:21:12,588 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1184445516, now seen corresponding path program 1 times [2021-11-02 23:21:12,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:12,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488114567] [2021-11-02 23:21:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:12,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:12,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488114567] [2021-11-02 23:21:12,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488114567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:12,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:12,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:12,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461387546] [2021-11-02 23:21:12,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:12,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:12,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:12,667 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:14,008 INFO L93 Difference]: Finished difference Result 528 states and 784 transitions. [2021-11-02 23:21:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:21:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:14,011 INFO L225 Difference]: With dead ends: 528 [2021-11-02 23:21:14,011 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 23:21:14,011 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 [2021-11-02 23:21:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 23:21:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 256. [2021-11-02 23:21:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4823529411764707) internal successors, (378), 255 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 378 transitions. [2021-11-02 23:21:14,022 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 378 transitions. Word has length 94 [2021-11-02 23:21:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 378 transitions. [2021-11-02 23:21:14,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 378 transitions. [2021-11-02 23:21:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:21:14,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:14,024 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:14,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-02 23:21:14,024 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -844140594, now seen corresponding path program 1 times [2021-11-02 23:21:14,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:14,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21785491] [2021-11-02 23:21:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:14,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:14,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:14,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21785491] [2021-11-02 23:21:14,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21785491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:14,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:14,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:14,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35373138] [2021-11-02 23:21:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:14,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:14,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:14,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:14,148 INFO L87 Difference]: Start difference. First operand 256 states and 378 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:15,582 INFO L93 Difference]: Finished difference Result 503 states and 748 transitions. [2021-11-02 23:21:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:15,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:21:15,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:15,586 INFO L225 Difference]: With dead ends: 503 [2021-11-02 23:21:15,586 INFO L226 Difference]: Without dead ends: 268 [2021-11-02 23:21:15,587 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 [2021-11-02 23:21:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-02 23:21:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 256. [2021-11-02 23:21:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4784313725490197) internal successors, (377), 255 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:15,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 377 transitions. [2021-11-02 23:21:15,622 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 377 transitions. Word has length 94 [2021-11-02 23:21:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:15,623 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 377 transitions. [2021-11-02 23:21:15,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 377 transitions. [2021-11-02 23:21:15,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:21:15,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:15,625 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:15,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-02 23:21:15,625 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1986994926, now seen corresponding path program 1 times [2021-11-02 23:21:15,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:15,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249011268] [2021-11-02 23:21:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:15,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:21:15,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:15,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249011268] [2021-11-02 23:21:15,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249011268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:15,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:15,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:15,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215353558] [2021-11-02 23:21:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:15,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:15,734 INFO L87 Difference]: Start difference. First operand 256 states and 377 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:18,142 INFO L93 Difference]: Finished difference Result 528 states and 780 transitions. [2021-11-02 23:21:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:18,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-02 23:21:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:18,144 INFO L225 Difference]: With dead ends: 528 [2021-11-02 23:21:18,144 INFO L226 Difference]: Without dead ends: 293 [2021-11-02 23:21:18,145 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 [2021-11-02 23:21:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-02 23:21:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 256. [2021-11-02 23:21:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.4745098039215687) internal successors, (376), 255 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2021-11-02 23:21:18,154 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 98 [2021-11-02 23:21:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:18,154 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2021-11-02 23:21:18,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2021-11-02 23:21:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:21:18,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:18,156 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:18,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-02 23:21:18,157 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:18,157 INFO L85 PathProgramCache]: Analyzing trace with hash -600209516, now seen corresponding path program 1 times [2021-11-02 23:21:18,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:18,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945953887] [2021-11-02 23:21:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:18,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 23:21:18,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:18,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945953887] [2021-11-02 23:21:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945953887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:18,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:18,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:18,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52048157] [2021-11-02 23:21:18,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:18,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:18,228 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:18,289 INFO L93 Difference]: Finished difference Result 721 states and 1074 transitions. [2021-11-02 23:21:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 98 [2021-11-02 23:21:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:18,293 INFO L225 Difference]: With dead ends: 721 [2021-11-02 23:21:18,293 INFO L226 Difference]: Without dead ends: 486 [2021-11-02 23:21:18,294 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 [2021-11-02 23:21:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-02 23:21:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2021-11-02 23:21:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.4701030927835053) internal successors, (713), 485 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 713 transitions. [2021-11-02 23:21:18,312 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 713 transitions. Word has length 98 [2021-11-02 23:21:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:18,312 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 713 transitions. [2021-11-02 23:21:18,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 713 transitions. [2021-11-02 23:21:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:21:18,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:18,315 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-02 23:21:18,315 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash 660707734, now seen corresponding path program 1 times [2021-11-02 23:21:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:18,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583713851] [2021-11-02 23:21:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:18,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 23:21:18,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583713851] [2021-11-02 23:21:18,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583713851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:18,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:18,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:18,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188931433] [2021-11-02 23:21:18,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:18,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:18,376 INFO L87 Difference]: Start difference. First operand 486 states and 713 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-11-02 23:21:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:18,417 INFO L93 Difference]: Finished difference Result 978 states and 1438 transitions. [2021-11-02 23:21:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 98 [2021-11-02 23:21:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:18,421 INFO L225 Difference]: With dead ends: 978 [2021-11-02 23:21:18,421 INFO L226 Difference]: Without dead ends: 513 [2021-11-02 23:21:18,422 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 [2021-11-02 23:21:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-02 23:21:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2021-11-02 23:21:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.4609375) internal successors, (748), 512 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 748 transitions. [2021-11-02 23:21:18,440 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 748 transitions. Word has length 98 [2021-11-02 23:21:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:18,441 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 748 transitions. [2021-11-02 23:21:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-11-02 23:21:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 748 transitions. [2021-11-02 23:21:18,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:21:18,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:18,443 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:18,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-02 23:21:18,444 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash 687773336, now seen corresponding path program 1 times [2021-11-02 23:21:18,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:18,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911121547] [2021-11-02 23:21:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:18,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-02 23:21:18,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:18,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911121547] [2021-11-02 23:21:18,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911121547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:18,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:18,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:18,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838176178] [2021-11-02 23:21:18,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:18,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:18,502 INFO L87 Difference]: Start difference. First operand 513 states and 748 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:18,538 INFO L93 Difference]: Finished difference Result 1007 states and 1474 transitions. [2021-11-02 23:21:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-02 23:21:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:18,543 INFO L225 Difference]: With dead ends: 1007 [2021-11-02 23:21:18,543 INFO L226 Difference]: Without dead ends: 515 [2021-11-02 23:21:18,546 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 [2021-11-02 23:21:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-02 23:21:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2021-11-02 23:21:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.4591439688715953) internal successors, (750), 514 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 750 transitions. [2021-11-02 23:21:18,587 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 750 transitions. Word has length 98 [2021-11-02 23:21:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:18,589 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 750 transitions. [2021-11-02 23:21:18,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 750 transitions. [2021-11-02 23:21:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:21:18,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:18,591 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:18,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-02 23:21:18,592 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1575564738, now seen corresponding path program 1 times [2021-11-02 23:21:18,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:18,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274948969] [2021-11-02 23:21:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:18,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:21:18,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:18,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274948969] [2021-11-02 23:21:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274948969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:18,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:18,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:18,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894405475] [2021-11-02 23:21:18,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:18,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:18,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:18,667 INFO L87 Difference]: Start difference. First operand 515 states and 750 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) [2021-11-02 23:21:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:18,730 INFO L93 Difference]: Finished difference Result 1242 states and 1824 transitions. [2021-11-02 23:21:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:18,731 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 100 [2021-11-02 23:21:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:18,736 INFO L225 Difference]: With dead ends: 1242 [2021-11-02 23:21:18,736 INFO L226 Difference]: Without dead ends: 750 [2021-11-02 23:21:18,737 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 [2021-11-02 23:21:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-02 23:21:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 748. [2021-11-02 23:21:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.4698795180722892) internal successors, (1098), 747 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1098 transitions. [2021-11-02 23:21:18,764 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1098 transitions. Word has length 100 [2021-11-02 23:21:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:18,764 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1098 transitions. [2021-11-02 23:21:18,765 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) [2021-11-02 23:21:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1098 transitions. [2021-11-02 23:21:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-02 23:21:18,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:18,767 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:18,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-02 23:21:18,767 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2024384893, now seen corresponding path program 1 times [2021-11-02 23:21:18,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:18,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074942265] [2021-11-02 23:21:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:18,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:21:18,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:18,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074942265] [2021-11-02 23:21:18,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074942265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:18,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:18,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:18,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487565743] [2021-11-02 23:21:18,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:18,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:18,848 INFO L87 Difference]: Start difference. First operand 748 states and 1098 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-11-02 23:21:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:18,933 INFO L93 Difference]: Finished difference Result 1708 states and 2518 transitions. [2021-11-02 23:21:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 106 [2021-11-02 23:21:18,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:18,941 INFO L225 Difference]: With dead ends: 1708 [2021-11-02 23:21:18,941 INFO L226 Difference]: Without dead ends: 983 [2021-11-02 23:21:18,943 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 [2021-11-02 23:21:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-11-02 23:21:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2021-11-02 23:21:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.4612244897959183) internal successors, (1432), 980 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1432 transitions. [2021-11-02 23:21:18,982 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1432 transitions. Word has length 106 [2021-11-02 23:21:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:18,983 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1432 transitions. [2021-11-02 23:21:18,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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) [2021-11-02 23:21:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1432 transitions. [2021-11-02 23:21:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 23:21:18,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:18,987 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:18,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-02 23:21:18,989 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1003200666, now seen corresponding path program 1 times [2021-11-02 23:21:18,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:18,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765811354] [2021-11-02 23:21:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:21:19,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:19,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765811354] [2021-11-02 23:21:19,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765811354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:19,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:19,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:19,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518959235] [2021-11-02 23:21:19,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:19,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:19,090 INFO L87 Difference]: Start difference. First operand 981 states and 1432 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:19,169 INFO L93 Difference]: Finished difference Result 2172 states and 3185 transitions. [2021-11-02 23:21:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 123 [2021-11-02 23:21:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:19,178 INFO L225 Difference]: With dead ends: 2172 [2021-11-02 23:21:19,178 INFO L226 Difference]: Without dead ends: 1214 [2021-11-02 23:21:19,180 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 [2021-11-02 23:21:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-11-02 23:21:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1214. [2021-11-02 23:21:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 1.4649629018961252) internal successors, (1777), 1213 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1777 transitions. [2021-11-02 23:21:19,224 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1777 transitions. Word has length 123 [2021-11-02 23:21:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:19,225 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1777 transitions. [2021-11-02 23:21:19,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1777 transitions. [2021-11-02 23:21:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-02 23:21:19,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:19,229 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:19,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-02 23:21:19,229 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:19,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1329906676, now seen corresponding path program 1 times [2021-11-02 23:21:19,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:19,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075185124] [2021-11-02 23:21:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:19,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 23:21:19,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:19,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075185124] [2021-11-02 23:21:19,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075185124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:19,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:19,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:21:19,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777541299] [2021-11-02 23:21:19,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:21:19,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:19,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:21:19,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:21:19,318 INFO L87 Difference]: Start difference. First operand 1214 states and 1777 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:19,393 INFO L93 Difference]: Finished difference Result 1451 states and 2122 transitions. [2021-11-02 23:21:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:21:19,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 129 [2021-11-02 23:21:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:19,403 INFO L225 Difference]: With dead ends: 1451 [2021-11-02 23:21:19,403 INFO L226 Difference]: Without dead ends: 1449 [2021-11-02 23:21:19,404 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 [2021-11-02 23:21:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-11-02 23:21:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1447. [2021-11-02 23:21:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 1.4654218533886583) internal successors, (2119), 1446 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2119 transitions. [2021-11-02 23:21:19,485 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2119 transitions. Word has length 129 [2021-11-02 23:21:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 2119 transitions. [2021-11-02 23:21:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2119 transitions. [2021-11-02 23:21:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 23:21:19,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:19,490 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:19,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-02 23:21:19,491 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1753625505, now seen corresponding path program 1 times [2021-11-02 23:21:19,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:19,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686306889] [2021-11-02 23:21:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:19,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 23:21:19,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:19,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686306889] [2021-11-02 23:21:19,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686306889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:19,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:19,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:21:19,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135740308] [2021-11-02 23:21:19,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:21:19,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:21:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:21:19,588 INFO L87 Difference]: Start difference. First operand 1447 states and 2119 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:21,115 INFO L93 Difference]: Finished difference Result 3249 states and 4787 transitions. [2021-11-02 23:21:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:21:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 165 [2021-11-02 23:21:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:21,128 INFO L225 Difference]: With dead ends: 3249 [2021-11-02 23:21:21,128 INFO L226 Difference]: Without dead ends: 1825 [2021-11-02 23:21:21,131 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 [2021-11-02 23:21:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-11-02 23:21:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1615. [2021-11-02 23:21:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 1.4950433705080546) internal successors, (2413), 1614 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2413 transitions. [2021-11-02 23:21:21,226 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2413 transitions. Word has length 165 [2021-11-02 23:21:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:21,227 INFO L470 AbstractCegarLoop]: Abstraction has 1615 states and 2413 transitions. [2021-11-02 23:21:21,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2413 transitions. [2021-11-02 23:21:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:21:21,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:21,233 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:21,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-02 23:21:21,233 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1458572921, now seen corresponding path program 1 times [2021-11-02 23:21:21,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:21,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006312321] [2021-11-02 23:21:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:21,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:21:21,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:21,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006312321] [2021-11-02 23:21:21,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006312321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:21,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:21,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:21:21,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575934718] [2021-11-02 23:21:21,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:21:21,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:21:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:21:21,594 INFO L87 Difference]: Start difference. First operand 1615 states and 2413 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:28,212 INFO L93 Difference]: Finished difference Result 6431 states and 9659 transitions. [2021-11-02 23:21:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:21:28,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 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 [2021-11-02 23:21:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:28,244 INFO L225 Difference]: With dead ends: 6431 [2021-11-02 23:21:28,244 INFO L226 Difference]: Without dead ends: 4839 [2021-11-02 23:21:28,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:21:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-11-02 23:21:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 2407. [2021-11-02 23:21:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2406 states have (on average 1.5793848711554448) internal successors, (3800), 2406 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3800 transitions. [2021-11-02 23:21:28,367 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3800 transitions. Word has length 166 [2021-11-02 23:21:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:28,368 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3800 transitions. [2021-11-02 23:21:28,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3800 transitions. [2021-11-02 23:21:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:21:28,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:28,376 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:28,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-02 23:21:28,377 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:28,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash -991027209, now seen corresponding path program 1 times [2021-11-02 23:21:28,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:28,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416363252] [2021-11-02 23:21:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:28,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-02 23:21:28,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:28,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416363252] [2021-11-02 23:21:28,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416363252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:21:28,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:21:28,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:21:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481430913] [2021-11-02 23:21:28,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:21:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:21:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:21:28,779 INFO L87 Difference]: Start difference. First operand 2407 states and 3800 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:31,578 INFO L93 Difference]: Finished difference Result 4811 states and 7596 transitions. [2021-11-02 23:21:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:21:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-11-02 23:21:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:31,610 INFO L225 Difference]: With dead ends: 4811 [2021-11-02 23:21:31,617 INFO L226 Difference]: Without dead ends: 2407 [2021-11-02 23:21:31,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:21:31,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-11-02 23:21:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2407. [2021-11-02 23:21:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2406 states have (on average 1.5789692435577722) internal successors, (3799), 2406 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3799 transitions. [2021-11-02 23:21:31,722 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3799 transitions. Word has length 166 [2021-11-02 23:21:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:31,722 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3799 transitions. [2021-11-02 23:21:31,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:21:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3799 transitions. [2021-11-02 23:21:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:21:31,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:31,728 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:31,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-02 23:21:31,729 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:31,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1579331765, now seen corresponding path program 1 times [2021-11-02 23:21:31,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:31,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772771299] [2021-11-02 23:21:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:31,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:21:32,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:32,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772771299] [2021-11-02 23:21:32,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772771299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:32,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38603234] [2021-11-02 23:21:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:32,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:32,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:32,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:21:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:32,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 23:21:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:52,133 WARN L207 SmtUtils]: Spent 18.95 s on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2021-11-02 23:21:52,134 INFO L354 Elim1Store]: treesize reduction 348, result has 9.6 percent of original size [2021-11-02 23:21:52,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 2564 treesize of output 2561 [2021-11-02 23:22:03,540 WARN L207 SmtUtils]: Spent 11.37 s on a formula simplification. DAG size of input: 72 DAG size of output: 25 [2021-11-02 23:22:03,541 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-02 23:22:03,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 2606 treesize of output 2545 [2021-11-02 23:23:15,755 WARN L207 SmtUtils]: Spent 1.20 m on a formula simplification. DAG size of input: 279 DAG size of output: 74 [2021-11-02 23:23:15,757 INFO L354 Elim1Store]: treesize reduction 2228, result has 8.4 percent of original size [2021-11-02 23:23:15,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 3059 treesize of output 2507 [2021-11-02 23:23:15,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-02 23:23:15,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:23:15,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 23:23:15,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303413206] [2021-11-02 23:23:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:23:15,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:15,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:23:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:23:15,854 INFO L87 Difference]: Start difference. First operand 2407 states and 3799 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:23:15,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:16,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:16,071 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6b18d2b2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-02 23:23:16,076 INFO L168 Benchmark]: Toolchain (without parser) took 204946.88 ms. Allocated memory was 121.6 MB in the beginning and 151.0 MB in the end (delta: 29.4 MB). Free memory was 83.1 MB in the beginning and 61.8 MB in the end (delta: 21.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 16.1 GB. [2021-11-02 23:23:16,076 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 96.0 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:23:16,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 960.54 ms. Allocated memory is still 121.6 MB. Free memory was 82.8 MB in the beginning and 73.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 23:23:16,077 INFO L168 Benchmark]: Boogie Procedure Inliner took 141.98 ms. Allocated memory is still 121.6 MB. Free memory was 73.9 MB in the beginning and 69.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 23:23:16,078 INFO L168 Benchmark]: Boogie Preprocessor took 107.57 ms. Allocated memory is still 121.6 MB. Free memory was 69.1 MB in the beginning and 61.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 23:23:16,081 INFO L168 Benchmark]: RCFGBuilder took 2068.77 ms. Allocated memory was 121.6 MB in the beginning and 151.0 MB in the end (delta: 29.4 MB). Free memory was 61.6 MB in the beginning and 73.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. [2021-11-02 23:23:16,082 INFO L168 Benchmark]: TraceAbstraction took 201658.28 ms. Allocated memory is still 151.0 MB. Free memory was 72.3 MB in the beginning and 61.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-11-02 23:23:16,085 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 96.0 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 960.54 ms. Allocated memory is still 121.6 MB. Free memory was 82.8 MB in the beginning and 73.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 141.98 ms. Allocated memory is still 121.6 MB. Free memory was 73.9 MB in the beginning and 69.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 107.57 ms. Allocated memory is still 121.6 MB. Free memory was 69.1 MB in the beginning and 61.6 MB in the end (delta: 7.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2068.77 ms. Allocated memory was 121.6 MB in the beginning and 151.0 MB in the end (delta: 29.4 MB). Free memory was 61.6 MB in the beginning and 73.3 MB in the end (delta: -11.7 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 201658.28 ms. Allocated memory is still 151.0 MB. Free memory was 72.3 MB in the beginning and 61.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6b18d2b2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6b18d2b2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-02 23:23:16,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU --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 e951bfa557af694cc1e8699e574c7b4724d1be498cab6731e1080e9fedb61dc3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:23:19,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:23:19,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:23:19,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:23:19,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:23:19,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:23:19,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:23:19,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:23:19,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:23:19,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:23:19,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:23:19,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:23:19,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:23:19,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:23:19,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:23:19,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:23:19,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:23:19,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:23:19,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:23:19,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:23:19,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:23:19,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:23:19,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:23:19,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:23:19,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:23:19,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:23:19,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:23:19,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:23:19,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:23:19,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:23:19,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:23:19,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:23:19,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:23:19,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:23:19,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:23:19,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:23:19,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:23:19,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:23:19,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:23:19,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:23:19,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:23:19,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-02 23:23:19,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:23:19,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:23:19,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:23:19,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:23:19,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:23:19,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:23:19,322 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:23:19,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:23:19,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:23:19,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:23:19,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:23:19,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:23:19,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:23:19,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:23:19,326 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 23:23:19,326 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 23:23:19,327 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:23:19,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:23:19,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:23:19,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:23:19,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:23:19,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:23:19,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:23:19,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:23:19,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:23:19,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:23:19,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:23:19,331 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 23:23:19,331 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 23:23:19,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:23:19,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:23:19,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:23:19,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:23:19,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 23:23:19,333 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e951bfa557af694cc1e8699e574c7b4724d1be498cab6731e1080e9fedb61dc3 [2021-11-02 23:23:19,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:23:19,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:23:19,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:23:19,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:23:19,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:23:19,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c [2021-11-02 23:23:19,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/2f1fa956a/77a8bd0f4ee044828128f46d80f2f59b/FLAG0c9a2106a [2021-11-02 23:23:20,968 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:23:20,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c [2021-11-02 23:23:21,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/2f1fa956a/77a8bd0f4ee044828128f46d80f2f59b/FLAG0c9a2106a [2021-11-02 23:23:21,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/data/2f1fa956a/77a8bd0f4ee044828128f46d80f2f59b [2021-11-02 23:23:21,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:23:21,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:23:21,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:23:21,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:23:21,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:23:21,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:21" (1/1) ... [2021-11-02 23:23:21,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f60177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:21, skipping insertion in model container [2021-11-02 23:23:21,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:21" (1/1) ... [2021-11-02 23:23:21,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:23:21,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:23:21,894 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_d7489b7d-ca80-423a-886a-ce4f1906e52e/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c[74353,74366] [2021-11-02 23:23:21,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:23:21,961 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:23:22,237 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_d7489b7d-ca80-423a-886a-ce4f1906e52e/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c[74353,74366] [2021-11-02 23:23:22,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:23:22,279 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:23:22,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22 WrapperNode [2021-11-02 23:23:22,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:23:22,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:23:22,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:23:22,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:23:22,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:23:22,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:23:22,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:23:22,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:23:22,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:23:22,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:23:22,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:23:22,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:23:22,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (1/1) ... [2021-11-02 23:23:22,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:23:22,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:22,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:23:22,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:23:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 23:23:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:23:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:23:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 23:23:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:23:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:23:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:23:22,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:23:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 23:23:23,056 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 23:23:27,696 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-02 23:23:27,696 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-02 23:23:27,713 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:23:27,714 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-02 23:23:27,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:27 BoogieIcfgContainer [2021-11-02 23:23:27,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:23:27,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:23:27,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:23:27,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:23:27,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:23:21" (1/3) ... [2021-11-02 23:23:27,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4cf06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:27, skipping insertion in model container [2021-11-02 23:23:27,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:22" (2/3) ... [2021-11-02 23:23:27,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4cf06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:27, skipping insertion in model container [2021-11-02 23:23:27,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:27" (3/3) ... [2021-11-02 23:23:27,727 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-2.c [2021-11-02 23:23:27,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:23:27,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:23:27,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:23:27,815 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 [2021-11-02 23:23:27,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:23:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:23:27,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:27,849 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:27,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-02 23:23:27,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:23:27,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995350356] [2021-11-02 23:23:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:27,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:23:27,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:23:27,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:23:27,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 23:23:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:23:28,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:23:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:28,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:23:28,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995350356] [2021-11-02 23:23:28,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995350356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:23:28,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:23:28,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:23:28,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332625277] [2021-11-02 23:23:28,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:23:28,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:23:28,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:23:28,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:28,981 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:29,282 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-02 23:23:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:23:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 37 [2021-11-02 23:23:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:29,319 INFO L225 Difference]: With dead ends: 566 [2021-11-02 23:23:29,322 INFO L226 Difference]: Without dead ends: 387 [2021-11-02 23:23:29,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-02 23:23:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-02 23:23:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-02 23:23:29,440 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-02 23:23:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:29,441 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-02 23:23:29,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-02 23:23:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:23:29,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:29,447 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:29,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:23:29,664 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 457194935, now seen corresponding path program 1 times [2021-11-02 23:23:29,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:23:29,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585385139] [2021-11-02 23:23:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:29,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:23:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:23:29,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:23:29,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 23:23:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:29,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:23:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:30,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:23:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:23:30,701 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:23:30,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585385139] [2021-11-02 23:23:30,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585385139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:23:30,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:23:30,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:23:30,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053032232] [2021-11-02 23:23:30,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:23:30,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:23:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:23:30,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:30,716 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:31,057 INFO L93 Difference]: Finished difference Result 880 states and 1354 transitions. [2021-11-02 23:23:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:23:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 60 [2021-11-02 23:23:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:31,064 INFO L225 Difference]: With dead ends: 880 [2021-11-02 23:23:31,064 INFO L226 Difference]: Without dead ends: 629 [2021-11-02 23:23:31,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-02 23:23:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 627. [2021-11-02 23:23:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 1.5191693290734825) internal successors, (951), 626 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 951 transitions. [2021-11-02 23:23:31,104 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 951 transitions. Word has length 60 [2021-11-02 23:23:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 951 transitions. [2021-11-02 23:23:31,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 951 transitions. [2021-11-02 23:23:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 23:23:31,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:31,114 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:31,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:31,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:23:31,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash 335691035, now seen corresponding path program 1 times [2021-11-02 23:23:31,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:23:31,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003218132] [2021-11-02 23:23:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:31,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:23:31,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:23:31,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:23:31,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 23:23:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:31,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:23:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:23:32,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:23:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:23:32,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:23:32,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003218132] [2021-11-02 23:23:32,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003218132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:23:32,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:23:32,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:23:32,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74557561] [2021-11-02 23:23:32,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:23:32,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:23:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:23:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:32,806 INFO L87 Difference]: Start difference. First operand 627 states and 951 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:33,124 INFO L93 Difference]: Finished difference Result 1366 states and 2084 transitions. [2021-11-02 23:23:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:23:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-02 23:23:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:33,133 INFO L225 Difference]: With dead ends: 1366 [2021-11-02 23:23:33,133 INFO L226 Difference]: Without dead ends: 873 [2021-11-02 23:23:33,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-02 23:23:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-02 23:23:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5160550458715596) internal successors, (1322), 872 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1322 transitions. [2021-11-02 23:23:33,180 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1322 transitions. Word has length 112 [2021-11-02 23:23:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:33,181 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1322 transitions. [2021-11-02 23:23:33,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1322 transitions. [2021-11-02 23:23:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-02 23:23:33,186 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:33,186 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-11-02 23:23:33,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:33,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:23:33,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1244955076, now seen corresponding path program 1 times [2021-11-02 23:23:33,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:23:33,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460484851] [2021-11-02 23:23:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:33,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:23:33,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:23:33,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:23:33,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 23:23:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:23:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:23:34,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:23:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:23:35,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:23:35,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460484851] [2021-11-02 23:23:35,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460484851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:23:35,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:23:35,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:23:35,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985288370] [2021-11-02 23:23:35,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:23:35,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:23:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:23:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:35,217 INFO L87 Difference]: Start difference. First operand 873 states and 1322 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:35,543 INFO L93 Difference]: Finished difference Result 1858 states and 2823 transitions. [2021-11-02 23:23:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:23:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 149 [2021-11-02 23:23:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:35,554 INFO L225 Difference]: With dead ends: 1858 [2021-11-02 23:23:35,554 INFO L226 Difference]: Without dead ends: 1119 [2021-11-02 23:23:35,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:23:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-02 23:23:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-02 23:23:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.5107334525939178) internal successors, (1689), 1118 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1689 transitions. [2021-11-02 23:23:35,623 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1689 transitions. Word has length 149 [2021-11-02 23:23:35,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:35,624 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1689 transitions. [2021-11-02 23:23:35,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1689 transitions. [2021-11-02 23:23:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 23:23:35,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:35,629 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:35,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:35,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:23:35,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:35,849 INFO L85 PathProgramCache]: Analyzing trace with hash -490932893, now seen corresponding path program 1 times [2021-11-02 23:23:35,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:23:35,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636707578] [2021-11-02 23:23:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:35,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:23:35,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:23:35,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:23:35,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 23:23:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:23:36,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:36,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:23:36,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:23:36,886 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-02 23:23:36,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 22 [2021-11-02 23:23:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-02 23:23:37,065 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-02 23:23:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 23:23:37,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:23:37,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 23:23:37,146 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 37 treesize of output 25 [2021-11-02 23:23:37,157 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 22 treesize of output 10 [2021-11-02 23:23:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:23:37,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:23:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-02 23:23:38,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:23:38,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636707578] [2021-11-02 23:23:38,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636707578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:23:38,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:23:38,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-02 23:23:38,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304194422] [2021-11-02 23:23:38,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:23:38,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:23:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:23:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:23:38,930 INFO L87 Difference]: Start difference. First operand 1119 states and 1689 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:51,235 INFO L93 Difference]: Finished difference Result 2235 states and 3374 transitions. [2021-11-02 23:23:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:23:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 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 165 [2021-11-02 23:23:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:51,249 INFO L225 Difference]: With dead ends: 2235 [2021-11-02 23:23:51,249 INFO L226 Difference]: Without dead ends: 1119 [2021-11-02 23:23:51,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:23:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-02 23:23:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-02 23:23:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.5098389982110911) internal successors, (1688), 1118 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1688 transitions. [2021-11-02 23:23:51,321 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1688 transitions. Word has length 165 [2021-11-02 23:23:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:51,322 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1688 transitions. [2021-11-02 23:23:51,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1688 transitions. [2021-11-02 23:23:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 23:23:51,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:51,329 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:51,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:51,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:23:51,551 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:51,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:51,551 INFO L85 PathProgramCache]: Analyzing trace with hash 7623909, now seen corresponding path program 1 times [2021-11-02 23:23:51,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:23:51,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138358728] [2021-11-02 23:23:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:51,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:23:51,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:23:51,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:23:51,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 23:23:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:23:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:52,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:23:52,670 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 23:23:52,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 23:23:53,106 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:23:53,107 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 [2021-11-02 23:23:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-02 23:23:53,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:23:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-02 23:23:54,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:23:54,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138358728] [2021-11-02 23:23:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138358728] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:23:54,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:23:54,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-02 23:23:54,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789884686] [2021-11-02 23:23:54,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:23:54,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:23:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:23:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:23:54,385 INFO L87 Difference]: Start difference. First operand 1119 states and 1688 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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) [2021-11-02 23:24:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:08,516 INFO L93 Difference]: Finished difference Result 4222 states and 6394 transitions. [2021-11-02 23:24:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:24:08,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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 165 [2021-11-02 23:24:08,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:08,541 INFO L225 Difference]: With dead ends: 4222 [2021-11-02 23:24:08,541 INFO L226 Difference]: Without dead ends: 3113 [2021-11-02 23:24:08,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:24:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-11-02 23:24:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 1343. [2021-11-02 23:24:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.5454545454545454) internal successors, (2074), 1342 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2074 transitions. [2021-11-02 23:24:08,644 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2074 transitions. Word has length 165 [2021-11-02 23:24:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2074 transitions. [2021-11-02 23:24:08,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 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) [2021-11-02 23:24:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2074 transitions. [2021-11-02 23:24:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 23:24:08,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:08,650 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:08,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:08,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:24:08,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:24:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:08,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2042784989, now seen corresponding path program 1 times [2021-11-02 23:24:08,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:24:08,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271857273] [2021-11-02 23:24:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:08,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:24:08,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:24:08,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:24:08,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 23:24:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:09,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:24:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:10,046 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 23:24:10,047 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 [2021-11-02 23:24:10,514 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 23:24:10,514 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 [2021-11-02 23:24:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 23:24:10,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:24:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 23:24:11,237 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:24:11,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271857273] [2021-11-02 23:24:11,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271857273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:24:11,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:24:11,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 23:24:11,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592208726] [2021-11-02 23:24:11,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:24:11,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:24:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:24:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:24:11,241 INFO L87 Difference]: Start difference. First operand 1343 states and 2074 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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) [2021-11-02 23:24:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:20,428 INFO L93 Difference]: Finished difference Result 3248 states and 5018 transitions. [2021-11-02 23:24:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:24:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 165 [2021-11-02 23:24:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:20,450 INFO L225 Difference]: With dead ends: 3248 [2021-11-02 23:24:20,450 INFO L226 Difference]: Without dead ends: 1915 [2021-11-02 23:24:20,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:24:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-11-02 23:24:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1595. [2021-11-02 23:24:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.5777917189460477) internal successors, (2515), 1594 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2515 transitions. [2021-11-02 23:24:20,554 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2515 transitions. Word has length 165 [2021-11-02 23:24:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:20,555 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2515 transitions. [2021-11-02 23:24:20,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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) [2021-11-02 23:24:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2515 transitions. [2021-11-02 23:24:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:24:20,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:20,561 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:20,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:20,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:24:20,784 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:24:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -266035401, now seen corresponding path program 1 times [2021-11-02 23:24:20,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:24:20,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801809130] [2021-11-02 23:24:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:20,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:24:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:24:20,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:24:20,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 23:24:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:22,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:24:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:24:23,096 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 41 treesize of output 29 [2021-11-02 23:24:23,103 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 29 treesize of output 23 [2021-11-02 23:24:23,193 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-02 23:24:23,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-11-02 23:24:23,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:23,446 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-02 23:24:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 54 [2021-11-02 23:24:25,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:24:25,003 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 1 case distinctions, treesize of input 22 treesize of output 10 [2021-11-02 23:24:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:24:25,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:24:25,470 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 38 treesize of output 26 [2021-11-02 23:24:25,476 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 26 treesize of output 20 [2021-11-02 23:24:27,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_20 (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| v_arrayElimCell_19 (store (select |c_#memory_int| v_arrayElimCell_19) (bvadd v_arrayElimCell_20 (_ bv844 32)) (_ bv3 32))) c_ULTIMATE.start_ssl3_accept_~s.base) (bvadd c_ULTIMATE.start_ssl3_accept_~s.offset (_ bv52 32))) (_ bv8640 32)))) is different from false [2021-11-02 23:24:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:24:27,738 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:24:27,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801809130] [2021-11-02 23:24:27,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801809130] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:27,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:24:27,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-02 23:24:27,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006518643] [2021-11-02 23:24:27,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:24:27,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:24:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:24:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=114, Unknown=1, NotChecked=22, Total=182 [2021-11-02 23:24:27,750 INFO L87 Difference]: Start difference. First operand 1595 states and 2515 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:34,481 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (select (select |c_#memory_int| c_ULTIMATE.start_ssl3_accept_~s.base) (bvadd c_ULTIMATE.start_ssl3_accept_~s.offset (_ bv52 32))) (_ bv8640 32))) (forall ((v_arrayElimCell_20 (_ BitVec 32)) (v_arrayElimCell_19 (_ BitVec 32))) (not (= (select (select (store |c_#memory_int| v_arrayElimCell_19 (store (select |c_#memory_int| v_arrayElimCell_19) (bvadd v_arrayElimCell_20 (_ bv844 32)) (_ bv3 32))) c_ULTIMATE.start_ssl3_accept_~s.base) (bvadd c_ULTIMATE.start_ssl3_accept_~s.offset (_ bv52 32))) (_ bv8640 32))))) is different from false [2021-11-02 23:24:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:34,948 INFO L93 Difference]: Finished difference Result 4423 states and 6956 transitions. [2021-11-02 23:24:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:24:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 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 [2021-11-02 23:24:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:34,967 INFO L225 Difference]: With dead ends: 4423 [2021-11-02 23:24:34,967 INFO L226 Difference]: Without dead ends: 2838 [2021-11-02 23:24:34,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=52, Invalid=136, Unknown=2, NotChecked=50, Total=240 [2021-11-02 23:24:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-11-02 23:24:35,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2146. [2021-11-02 23:24:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 2145 states have (on average 1.6344988344988345) internal successors, (3506), 2145 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3506 transitions. [2021-11-02 23:24:35,114 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3506 transitions. Word has length 166 [2021-11-02 23:24:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:35,114 INFO L470 AbstractCegarLoop]: Abstraction has 2146 states and 3506 transitions. [2021-11-02 23:24:35,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:24:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3506 transitions. [2021-11-02 23:24:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-02 23:24:35,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:35,122 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:35,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:24:35,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:24:35,346 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:24:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1579331765, now seen corresponding path program 1 times [2021-11-02 23:24:35,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:24:35,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149516485] [2021-11-02 23:24:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:35,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:24:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:24:35,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:24:35,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7489b7d-ca80-423a-886a-ce4f1906e52e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 23:24:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:24:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:24:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:37,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:24:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1871 treesize of output 1868 [2021-11-02 23:24:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver