./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.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_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/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_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/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_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:09:46,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:09:46,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:09:47,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:09:47,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:09:47,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:09:47,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:09:47,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:09:47,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:09:47,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:09:47,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:09:47,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:09:47,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:09:47,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:09:47,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:09:47,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:09:47,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:09:47,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:09:47,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:09:47,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:09:47,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:09:47,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:09:47,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:09:47,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:09:47,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:09:47,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:09:47,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:09:47,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:09:47,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:09:47,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:09:47,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:09:47,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:09:47,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:09:47,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:09:47,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:09:47,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:09:47,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:09:47,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:09:47,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:09:47,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:09:47,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:09:47,077 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:09:47,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:09:47,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:09:47,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:09:47,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:09:47,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:09:47,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:09:47,107 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:09:47,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:09:47,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:09:47,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:09:47,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:09:47,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:09:47,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:09:47,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:09:47,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:09:47,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:09:47,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:09:47,110 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:09:47,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:09:47,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:09:47,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:09:47,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:09:47,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:09:47,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:09:47,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:09:47,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:09:47,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:09:47,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:09:47,112 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:09:47,112 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:09:47,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:09:47,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:09:47,113 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_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2021-11-02 22:09:47,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:09:47,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:09:47,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:09:47,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:09:47,463 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:09:47,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-02 22:09:47,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/data/ac0e137a9/4d7a39ba2e4d477299af7beae5371177/FLAG437ae36a8 [2021-11-02 22:09:48,340 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:09:48,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2021-11-02 22:09:48,369 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/data/ac0e137a9/4d7a39ba2e4d477299af7beae5371177/FLAG437ae36a8 [2021-11-02 22:09:48,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/data/ac0e137a9/4d7a39ba2e4d477299af7beae5371177 [2021-11-02 22:09:48,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:09:48,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:09:48,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:09:48,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:09:48,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:09:48,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:09:48" (1/1) ... [2021-11-02 22:09:48,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23738182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:48, skipping insertion in model container [2021-11-02 22:09:48,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:09:48" (1/1) ... [2021-11-02 22:09:48,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:09:48,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:09:49,137 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_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-02 22:09:49,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:09:49,175 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:09:49,365 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_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2021-11-02 22:09:49,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:09:49,412 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:09:49,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49 WrapperNode [2021-11-02 22:09:49,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:09:49,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:09:49,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:09:49,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:09:49,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:49,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:49,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:09:49,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:09:49,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:09:49,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:09:49,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:49,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:49,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:49,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:49,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:50,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:50,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:50,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:09:50,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:09:50,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:09:50,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:09:50,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (1/1) ... [2021-11-02 22:09:50,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:09:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:09:50,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:09:50,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a035afcc-1695-46a7-b7bd-3a9ccf47f9d5/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:09:50,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:09:50,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:09:50,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:09:50,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:09:57,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:09:57,252 INFO L299 CfgBuilder]: Removed 761 assume(true) statements. [2021-11-02 22:09:57,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:09:57 BoogieIcfgContainer [2021-11-02 22:09:57,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:09:57,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:09:57,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:09:57,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:09:57,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:09:48" (1/3) ... [2021-11-02 22:09:57,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb78a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:09:57, skipping insertion in model container [2021-11-02 22:09:57,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:09:49" (2/3) ... [2021-11-02 22:09:57,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb78a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:09:57, skipping insertion in model container [2021-11-02 22:09:57,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:09:57" (3/3) ... [2021-11-02 22:09:57,273 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2021-11-02 22:09:57,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:09:57,280 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-02 22:09:57,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:09:57,354 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 22:09:57,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-02 22:09:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 3457 states, 3451 states have (on average 1.894523326572008) internal successors, (6538), 3456 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states 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 22:09:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:09:57,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:57,473 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:57,474 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:09:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash -909233364, now seen corresponding path program 1 times [2021-11-02 22:09:57,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:57,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573638557] [2021-11-02 22:09:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:57,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:57,966 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 22:09:57,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:57,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573638557] [2021-11-02 22:09:57,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573638557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:57,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:57,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:09:57,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507432554] [2021-11-02 22:09:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:09:57,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:09:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:09:58,002 INFO L87 Difference]: Start difference. First operand has 3457 states, 3451 states have (on average 1.894523326572008) internal successors, (6538), 3456 states have internal predecessors, (6538), 0 states have call successors, (0), 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 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 22:09:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:09:58,421 INFO L93 Difference]: Finished difference Result 10291 states and 19469 transitions. [2021-11-02 22:09:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:09:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 22:09:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:09:58,499 INFO L225 Difference]: With dead ends: 10291 [2021-11-02 22:09:58,499 INFO L226 Difference]: Without dead ends: 6839 [2021-11-02 22:09:58,513 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 22:09:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2021-11-02 22:09:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 3453. [2021-11-02 22:09:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3448 states have (on average 1.8909512761020881) internal successors, (6520), 3452 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states 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 22:09:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 6520 transitions. [2021-11-02 22:09:58,868 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 6520 transitions. Word has length 52 [2021-11-02 22:09:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:09:58,869 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 6520 transitions. [2021-11-02 22:09:58,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 22:09:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 6520 transitions. [2021-11-02 22:09:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:09:58,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:09:58,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:09:58,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:09:58,878 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:09:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:09:58,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1312170843, now seen corresponding path program 1 times [2021-11-02 22:09:58,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:09:58,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877547870] [2021-11-02 22:09:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:09:58,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:09:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:09:59,041 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 22:09:59,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:09:59,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877547870] [2021-11-02 22:09:59,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877547870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:09:59,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:09:59,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:09:59,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002905723] [2021-11-02 22:09:59,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:09:59,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:09:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:09:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:09:59,046 INFO L87 Difference]: Start difference. First operand 3453 states and 6520 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:00,014 INFO L93 Difference]: Finished difference Result 13587 states and 25677 transitions. [2021-11-02 22:10:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:10:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 22:10:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:00,094 INFO L225 Difference]: With dead ends: 13587 [2021-11-02 22:10:00,095 INFO L226 Difference]: Without dead ends: 10177 [2021-11-02 22:10:00,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:10:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2021-11-02 22:10:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 3449. [2021-11-02 22:10:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3444 states have (on average 1.8899535423925669) internal successors, (6509), 3448 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states 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 22:10:00,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 6509 transitions. [2021-11-02 22:10:00,374 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 6509 transitions. Word has length 59 [2021-11-02 22:10:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:00,375 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 6509 transitions. [2021-11-02 22:10:00,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 6509 transitions. [2021-11-02 22:10:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:10:00,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:00,382 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:00,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:10:00,383 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2111728846, now seen corresponding path program 1 times [2021-11-02 22:10:00,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:00,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889655590] [2021-11-02 22:10:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:00,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:00,547 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 22:10:00,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:00,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889655590] [2021-11-02 22:10:00,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889655590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:00,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:00,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:00,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259797733] [2021-11-02 22:10:00,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:00,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:00,552 INFO L87 Difference]: Start difference. First operand 3449 states and 6509 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:01,216 INFO L93 Difference]: Finished difference Result 10235 states and 19336 transitions. [2021-11-02 22:10:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:01,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:10:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:01,278 INFO L225 Difference]: With dead ends: 10235 [2021-11-02 22:10:01,278 INFO L226 Difference]: Without dead ends: 6829 [2021-11-02 22:10:01,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:10:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-11-02 22:10:01,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 3449. [2021-11-02 22:10:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3444 states have (on average 1.8873403019744484) internal successors, (6500), 3448 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states 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 22:10:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 6500 transitions. [2021-11-02 22:10:01,485 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 6500 transitions. Word has length 61 [2021-11-02 22:10:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:01,485 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 6500 transitions. [2021-11-02 22:10:01,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 6500 transitions. [2021-11-02 22:10:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:10:01,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:01,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:10:01,492 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1212715007, now seen corresponding path program 1 times [2021-11-02 22:10:01,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:01,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768754580] [2021-11-02 22:10:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:01,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:01,577 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 22:10:01,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:01,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768754580] [2021-11-02 22:10:01,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768754580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:01,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:01,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:01,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29486489] [2021-11-02 22:10:01,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:01,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:01,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:01,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:01,581 INFO L87 Difference]: Start difference. First operand 3449 states and 6500 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:02,200 INFO L93 Difference]: Finished difference Result 10235 states and 19318 transitions. [2021-11-02 22:10:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:10:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:02,221 INFO L225 Difference]: With dead ends: 10235 [2021-11-02 22:10:02,221 INFO L226 Difference]: Without dead ends: 6829 [2021-11-02 22:10:02,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:10:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-11-02 22:10:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 3449. [2021-11-02 22:10:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3444 states have (on average 1.8847270615563299) internal successors, (6491), 3448 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states 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 22:10:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 6491 transitions. [2021-11-02 22:10:02,413 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 6491 transitions. Word has length 63 [2021-11-02 22:10:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:02,414 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 6491 transitions. [2021-11-02 22:10:02,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:02,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 6491 transitions. [2021-11-02 22:10:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:10:02,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:02,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:02,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:10:02,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1504119602, now seen corresponding path program 1 times [2021-11-02 22:10:02,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:02,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352066472] [2021-11-02 22:10:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:02,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:02,495 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 22:10:02,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:02,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352066472] [2021-11-02 22:10:02,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352066472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:02,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:02,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:02,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355034254] [2021-11-02 22:10:02,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:02,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:02,501 INFO L87 Difference]: Start difference. First operand 3449 states and 6491 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:03,410 INFO L93 Difference]: Finished difference Result 16935 states and 31962 transitions. [2021-11-02 22:10:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:10:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:03,452 INFO L225 Difference]: With dead ends: 16935 [2021-11-02 22:10:03,453 INFO L226 Difference]: Without dead ends: 13529 [2021-11-02 22:10:03,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:10:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13529 states. [2021-11-02 22:10:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13529 to 3449. [2021-11-02 22:10:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3444 states have (on average 1.8835656213704994) internal successors, (6487), 3448 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states 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 22:10:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 6487 transitions. [2021-11-02 22:10:03,709 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 6487 transitions. Word has length 65 [2021-11-02 22:10:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:03,710 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 6487 transitions. [2021-11-02 22:10:03,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 6487 transitions. [2021-11-02 22:10:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:10:03,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:03,715 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:10:03,715 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1842272334, now seen corresponding path program 1 times [2021-11-02 22:10:03,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:03,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916213304] [2021-11-02 22:10:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:03,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:03,776 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 22:10:03,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:03,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916213304] [2021-11-02 22:10:03,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916213304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:03,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:03,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:03,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300171540] [2021-11-02 22:10:03,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:03,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:03,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:03,780 INFO L87 Difference]: Start difference. First operand 3449 states and 6487 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:04,429 INFO L93 Difference]: Finished difference Result 13564 states and 25591 transitions. [2021-11-02 22:10:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:10:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:04,461 INFO L225 Difference]: With dead ends: 13564 [2021-11-02 22:10:04,462 INFO L226 Difference]: Without dead ends: 10137 [2021-11-02 22:10:04,471 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 22:10:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10137 states. [2021-11-02 22:10:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10137 to 3431. [2021-11-02 22:10:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3426 states have (on average 1.884413309982487) internal successors, (6456), 3430 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states 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 22:10:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 6456 transitions. [2021-11-02 22:10:04,723 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 6456 transitions. Word has length 65 [2021-11-02 22:10:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:04,723 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 6456 transitions. [2021-11-02 22:10:04,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 6456 transitions. [2021-11-02 22:10:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:10:04,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:04,729 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:04,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:10:04,730 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:04,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1910731689, now seen corresponding path program 1 times [2021-11-02 22:10:04,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:04,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006966684] [2021-11-02 22:10:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:04,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:04,850 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 22:10:04,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:04,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006966684] [2021-11-02 22:10:04,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006966684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:04,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:04,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:04,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299715468] [2021-11-02 22:10:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:04,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:04,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:04,855 INFO L87 Difference]: Start difference. First operand 3431 states and 6456 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 22:10:05,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:05,333 INFO L93 Difference]: Finished difference Result 10199 states and 19231 transitions. [2021-11-02 22:10:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 22:10:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:05,353 INFO L225 Difference]: With dead ends: 10199 [2021-11-02 22:10:05,353 INFO L226 Difference]: Without dead ends: 6790 [2021-11-02 22:10:05,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:10:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6790 states. [2021-11-02 22:10:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6790 to 3431. [2021-11-02 22:10:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3426 states have (on average 1.882661996497373) internal successors, (6450), 3430 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states 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 22:10:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 6450 transitions. [2021-11-02 22:10:05,597 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 6450 transitions. Word has length 66 [2021-11-02 22:10:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:05,597 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 6450 transitions. [2021-11-02 22:10:05,597 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 22:10:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 6450 transitions. [2021-11-02 22:10:05,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:10:05,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:05,602 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:05,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:10:05,603 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:05,603 INFO L85 PathProgramCache]: Analyzing trace with hash 867823383, now seen corresponding path program 1 times [2021-11-02 22:10:05,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:05,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883312723] [2021-11-02 22:10:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:05,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:05,709 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 22:10:05,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:05,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883312723] [2021-11-02 22:10:05,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883312723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:05,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:05,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:05,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363335434] [2021-11-02 22:10:05,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:05,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:05,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:05,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:05,713 INFO L87 Difference]: Start difference. First operand 3431 states and 6450 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 22:10:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:06,164 INFO L93 Difference]: Finished difference Result 10199 states and 19219 transitions. [2021-11-02 22:10:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:06,165 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 22:10:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:06,184 INFO L225 Difference]: With dead ends: 10199 [2021-11-02 22:10:06,184 INFO L226 Difference]: Without dead ends: 6790 [2021-11-02 22:10:06,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 22:10:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6790 states. [2021-11-02 22:10:06,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6790 to 3431. [2021-11-02 22:10:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3426 states have (on average 1.8809106830122593) internal successors, (6444), 3430 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states 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 22:10:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 6444 transitions. [2021-11-02 22:10:06,375 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 6444 transitions. Word has length 67 [2021-11-02 22:10:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:06,376 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 6444 transitions. [2021-11-02 22:10:06,376 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 22:10:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 6444 transitions. [2021-11-02 22:10:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:10:06,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:06,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:06,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:10:06,381 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:06,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1926519908, now seen corresponding path program 1 times [2021-11-02 22:10:06,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:06,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222867246] [2021-11-02 22:10:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:06,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:06,470 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 22:10:06,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:06,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222867246] [2021-11-02 22:10:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222867246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:06,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:06,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:10:06,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402811312] [2021-11-02 22:10:06,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:10:06,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:10:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:10:06,473 INFO L87 Difference]: Start difference. First operand 3431 states and 6444 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 22:10:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:07,283 INFO L93 Difference]: Finished difference Result 16906 states and 31876 transitions. [2021-11-02 22:10:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:10:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 22:10:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:07,324 INFO L225 Difference]: With dead ends: 16906 [2021-11-02 22:10:07,324 INFO L226 Difference]: Without dead ends: 13503 [2021-11-02 22:10:07,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:10:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13503 states. [2021-11-02 22:10:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13503 to 3433. [2021-11-02 22:10:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3428 states have (on average 1.8801050175029173) internal successors, (6445), 3432 states have internal predecessors, (6445), 0 states have call successors, (0), 0 states 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 22:10:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 6445 transitions. [2021-11-02 22:10:07,575 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 6445 transitions. Word has length 68 [2021-11-02 22:10:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:07,576 INFO L470 AbstractCegarLoop]: Abstraction has 3433 states and 6445 transitions. [2021-11-02 22:10:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 22:10:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 6445 transitions. [2021-11-02 22:10:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:10:07,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:07,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:07,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:10:07,581 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash 11608961, now seen corresponding path program 1 times [2021-11-02 22:10:07,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:07,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696646043] [2021-11-02 22:10:07,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:07,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:07,669 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 22:10:07,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:07,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696646043] [2021-11-02 22:10:07,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696646043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:07,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:07,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:10:07,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600799515] [2021-11-02 22:10:07,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:10:07,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:10:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:10:07,673 INFO L87 Difference]: Start difference. First operand 3433 states and 6445 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 22:10:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:08,487 INFO L93 Difference]: Finished difference Result 16898 states and 31855 transitions. [2021-11-02 22:10:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:10:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 22:10:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:08,523 INFO L225 Difference]: With dead ends: 16898 [2021-11-02 22:10:08,523 INFO L226 Difference]: Without dead ends: 13498 [2021-11-02 22:10:08,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:10:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13498 states. [2021-11-02 22:10:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13498 to 3438. [2021-11-02 22:10:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3433 states have (on average 1.8796970579667929) internal successors, (6453), 3437 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states 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 22:10:08,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 6453 transitions. [2021-11-02 22:10:08,876 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 6453 transitions. Word has length 70 [2021-11-02 22:10:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:08,877 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 6453 transitions. [2021-11-02 22:10:08,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 22:10:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 6453 transitions. [2021-11-02 22:10:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:10:08,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:08,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:08,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:10:08,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:08,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash 966464028, now seen corresponding path program 1 times [2021-11-02 22:10:08,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:08,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343940086] [2021-11-02 22:10:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:08,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:08,959 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 22:10:08,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:08,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343940086] [2021-11-02 22:10:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343940086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:08,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:08,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:10:08,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560285309] [2021-11-02 22:10:08,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:08,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:08,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:08,964 INFO L87 Difference]: Start difference. First operand 3438 states and 6453 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 22:10:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:09,204 INFO L93 Difference]: Finished difference Result 6818 states and 12824 transitions. [2021-11-02 22:10:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 72 [2021-11-02 22:10:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:09,215 INFO L225 Difference]: With dead ends: 6818 [2021-11-02 22:10:09,215 INFO L226 Difference]: Without dead ends: 3417 [2021-11-02 22:10:09,220 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 22:10:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-11-02 22:10:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3417. [2021-11-02 22:10:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3412 states have (on average 1.880715123094959) internal successors, (6417), 3416 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states 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 22:10:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 6417 transitions. [2021-11-02 22:10:09,407 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 6417 transitions. Word has length 72 [2021-11-02 22:10:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:09,408 INFO L470 AbstractCegarLoop]: Abstraction has 3417 states and 6417 transitions. [2021-11-02 22:10:09,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 22:10:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 6417 transitions. [2021-11-02 22:10:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:10:09,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:09,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:09,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:10:09,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1553956183, now seen corresponding path program 1 times [2021-11-02 22:10:09,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:09,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144217221] [2021-11-02 22:10:09,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:09,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:09,499 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 22:10:09,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:09,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144217221] [2021-11-02 22:10:09,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144217221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:09,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:09,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:10:09,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476354786] [2021-11-02 22:10:09,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:10:09,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:10:09,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:10:09,502 INFO L87 Difference]: Start difference. First operand 3417 states and 6417 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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 22:10:09,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:09,727 INFO L93 Difference]: Finished difference Result 6767 states and 12746 transitions. [2021-11-02 22:10:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:10:09,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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 74 [2021-11-02 22:10:09,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:09,734 INFO L225 Difference]: With dead ends: 6767 [2021-11-02 22:10:09,734 INFO L226 Difference]: Without dead ends: 3411 [2021-11-02 22:10:09,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:10:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-11-02 22:10:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3411. [2021-11-02 22:10:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3406 states have (on average 1.8813857897827364) internal successors, (6408), 3410 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states 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 22:10:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 6408 transitions. [2021-11-02 22:10:09,930 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 6408 transitions. Word has length 74 [2021-11-02 22:10:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:09,931 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 6408 transitions. [2021-11-02 22:10:09,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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 22:10:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 6408 transitions. [2021-11-02 22:10:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:10:09,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:09,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:09,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:10:09,935 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2056564521, now seen corresponding path program 1 times [2021-11-02 22:10:09,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:09,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080520145] [2021-11-02 22:10:09,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:09,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:10,006 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 22:10:10,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:10,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080520145] [2021-11-02 22:10:10,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080520145] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:10,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:10,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:10,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799745127] [2021-11-02 22:10:10,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:10:10,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:10:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:10:10,010 INFO L87 Difference]: Start difference. First operand 3411 states and 6408 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:10,282 INFO L93 Difference]: Finished difference Result 6761 states and 12737 transitions. [2021-11-02 22:10:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:10:10,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 22:10:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:10,289 INFO L225 Difference]: With dead ends: 6761 [2021-11-02 22:10:10,290 INFO L226 Difference]: Without dead ends: 3397 [2021-11-02 22:10:10,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:10:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-11-02 22:10:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3397. [2021-11-02 22:10:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3392 states have (on average 1.8829599056603774) internal successors, (6387), 3396 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states 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 22:10:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 6387 transitions. [2021-11-02 22:10:10,529 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 6387 transitions. Word has length 74 [2021-11-02 22:10:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 6387 transitions. [2021-11-02 22:10:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 6387 transitions. [2021-11-02 22:10:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:10:10,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:10,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:10,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:10:10,536 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -56926326, now seen corresponding path program 1 times [2021-11-02 22:10:10,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:10,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823746527] [2021-11-02 22:10:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:10,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:10,654 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 22:10:10,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:10,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823746527] [2021-11-02 22:10:10,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823746527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:10,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:10,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:10:10,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278854514] [2021-11-02 22:10:10,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:10:10,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:10:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:10:10,657 INFO L87 Difference]: Start difference. First operand 3397 states and 6387 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:11,076 INFO L93 Difference]: Finished difference Result 6761 states and 12732 transitions. [2021-11-02 22:10:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:10:11,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:10:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:11,084 INFO L225 Difference]: With dead ends: 6761 [2021-11-02 22:10:11,084 INFO L226 Difference]: Without dead ends: 3417 [2021-11-02 22:10:11,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:10:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-11-02 22:10:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3397. [2021-11-02 22:10:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3392 states have (on average 1.8826650943396226) internal successors, (6386), 3396 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states 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 22:10:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 6386 transitions. [2021-11-02 22:10:11,308 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 6386 transitions. Word has length 75 [2021-11-02 22:10:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:11,308 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 6386 transitions. [2021-11-02 22:10:11,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 6386 transitions. [2021-11-02 22:10:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:10:11,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:11,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:11,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:10:11,314 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1358899134, now seen corresponding path program 1 times [2021-11-02 22:10:11,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:11,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179186492] [2021-11-02 22:10:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:11,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:11,401 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 22:10:11,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:11,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179186492] [2021-11-02 22:10:11,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179186492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:11,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:11,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:10:11,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637877344] [2021-11-02 22:10:11,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:10:11,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:11,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:10:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:10:11,404 INFO L87 Difference]: Start difference. First operand 3397 states and 6386 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 22:10:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:11,777 INFO L93 Difference]: Finished difference Result 6751 states and 12713 transitions. [2021-11-02 22:10:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:10:11,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 76 [2021-11-02 22:10:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:11,781 INFO L225 Difference]: With dead ends: 6751 [2021-11-02 22:10:11,781 INFO L226 Difference]: Without dead ends: 3412 [2021-11-02 22:10:11,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:10:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-11-02 22:10:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3397. [2021-11-02 22:10:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3392 states have (on average 1.882370283018868) internal successors, (6385), 3396 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states 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 22:10:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 6385 transitions. [2021-11-02 22:10:11,972 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 6385 transitions. Word has length 76 [2021-11-02 22:10:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:11,973 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 6385 transitions. [2021-11-02 22:10:11,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 22:10:11,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 6385 transitions. [2021-11-02 22:10:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:10:11,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:11,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:11,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:10:11,978 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash -377376449, now seen corresponding path program 1 times [2021-11-02 22:10:11,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:11,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201947964] [2021-11-02 22:10:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:11,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:12,048 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 22:10:12,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:12,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201947964] [2021-11-02 22:10:12,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201947964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:12,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:12,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:10:12,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304159819] [2021-11-02 22:10:12,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:12,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:12,056 INFO L87 Difference]: Start difference. First operand 3397 states and 6385 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:12,599 INFO L93 Difference]: Finished difference Result 8156 states and 15366 transitions. [2021-11-02 22:10:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:12,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:10:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:12,611 INFO L225 Difference]: With dead ends: 8156 [2021-11-02 22:10:12,612 INFO L226 Difference]: Without dead ends: 5648 [2021-11-02 22:10:12,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:10:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-11-02 22:10:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5633. [2021-11-02 22:10:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5633 states, 5628 states have (on average 1.8821961620469083) internal successors, (10593), 5632 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states 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 22:10:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5633 states to 5633 states and 10593 transitions. [2021-11-02 22:10:12,981 INFO L78 Accepts]: Start accepts. Automaton has 5633 states and 10593 transitions. Word has length 77 [2021-11-02 22:10:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:12,981 INFO L470 AbstractCegarLoop]: Abstraction has 5633 states and 10593 transitions. [2021-11-02 22:10:12,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5633 states and 10593 transitions. [2021-11-02 22:10:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:10:12,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:12,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:12,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:10:12,987 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1863295700, now seen corresponding path program 1 times [2021-11-02 22:10:12,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:12,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217379063] [2021-11-02 22:10:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:12,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:13,068 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 22:10:13,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:13,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217379063] [2021-11-02 22:10:13,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217379063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:13,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:13,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:10:13,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121759829] [2021-11-02 22:10:13,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:13,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:13,071 INFO L87 Difference]: Start difference. First operand 5633 states and 10593 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:13,645 INFO L93 Difference]: Finished difference Result 14176 states and 26695 transitions. [2021-11-02 22:10:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:10:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:13,661 INFO L225 Difference]: With dead ends: 14176 [2021-11-02 22:10:13,661 INFO L226 Difference]: Without dead ends: 10022 [2021-11-02 22:10:13,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:10:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-11-02 22:10:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 10007. [2021-11-02 22:10:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10002 states have (on average 1.8819236152769445) internal successors, (18823), 10006 states have internal predecessors, (18823), 0 states have call successors, (0), 0 states 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 22:10:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 18823 transitions. [2021-11-02 22:10:14,286 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 18823 transitions. Word has length 78 [2021-11-02 22:10:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:14,286 INFO L470 AbstractCegarLoop]: Abstraction has 10007 states and 18823 transitions. [2021-11-02 22:10:14,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 18823 transitions. [2021-11-02 22:10:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:10:14,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:14,290 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:14,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:10:14,290 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 238543396, now seen corresponding path program 1 times [2021-11-02 22:10:14,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:14,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826533366] [2021-11-02 22:10:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:14,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:14,346 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 22:10:14,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:14,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826533366] [2021-11-02 22:10:14,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826533366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:14,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:14,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:10:14,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116464376] [2021-11-02 22:10:14,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:14,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:14,348 INFO L87 Difference]: Start difference. First operand 10007 states and 18823 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 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 22:10:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:15,739 INFO L93 Difference]: Finished difference Result 26020 states and 48968 transitions. [2021-11-02 22:10:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:10:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:15,782 INFO L225 Difference]: With dead ends: 26020 [2021-11-02 22:10:15,782 INFO L226 Difference]: Without dead ends: 18564 [2021-11-02 22:10:15,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:10:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18564 states. [2021-11-02 22:10:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18564 to 18549. [2021-11-02 22:10:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18549 states, 18544 states have (on average 1.8808239861949956) internal successors, (34878), 18548 states have internal predecessors, (34878), 0 states have call successors, (0), 0 states 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 22:10:17,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18549 states to 18549 states and 34878 transitions. [2021-11-02 22:10:17,034 INFO L78 Accepts]: Start accepts. Automaton has 18549 states and 34878 transitions. Word has length 79 [2021-11-02 22:10:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 18549 states and 34878 transitions. [2021-11-02 22:10:17,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 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 22:10:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 18549 states and 34878 transitions. [2021-11-02 22:10:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:10:17,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:17,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:17,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:10:17,038 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash -955282663, now seen corresponding path program 1 times [2021-11-02 22:10:17,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:17,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425565420] [2021-11-02 22:10:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:17,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:17,109 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 22:10:17,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:17,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425565420] [2021-11-02 22:10:17,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425565420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:17,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:17,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:10:17,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229656850] [2021-11-02 22:10:17,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:17,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:17,113 INFO L87 Difference]: Start difference. First operand 18549 states and 34878 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 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 22:10:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:18,528 INFO L93 Difference]: Finished difference Result 49296 states and 92679 transitions. [2021-11-02 22:10:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 22:10:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:18,584 INFO L225 Difference]: With dead ends: 49296 [2021-11-02 22:10:18,584 INFO L226 Difference]: Without dead ends: 35226 [2021-11-02 22:10:18,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:10:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35226 states. [2021-11-02 22:10:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35226 to 35211. [2021-11-02 22:10:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35211 states, 35206 states have (on average 1.8787990683406237) internal successors, (66145), 35210 states have internal predecessors, (66145), 0 states have call successors, (0), 0 states 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 22:10:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35211 states to 35211 states and 66145 transitions. [2021-11-02 22:10:20,526 INFO L78 Accepts]: Start accepts. Automaton has 35211 states and 66145 transitions. Word has length 80 [2021-11-02 22:10:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:20,526 INFO L470 AbstractCegarLoop]: Abstraction has 35211 states and 66145 transitions. [2021-11-02 22:10:20,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 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 22:10:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 35211 states and 66145 transitions. [2021-11-02 22:10:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:10:20,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:20,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:20,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:10:20,531 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1675297015, now seen corresponding path program 1 times [2021-11-02 22:10:20,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:20,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848498932] [2021-11-02 22:10:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:20,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:20,598 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 22:10:20,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:20,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848498932] [2021-11-02 22:10:20,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848498932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:20,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:20,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:10:20,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155027012] [2021-11-02 22:10:20,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:10:20,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:10:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:10:20,601 INFO L87 Difference]: Start difference. First operand 35211 states and 66145 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 22:10:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:23,963 INFO L93 Difference]: Finished difference Result 95004 states and 178366 transitions. [2021-11-02 22:10:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:10:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 22:10:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:24,086 INFO L225 Difference]: With dead ends: 95004 [2021-11-02 22:10:24,086 INFO L226 Difference]: Without dead ends: 67696 [2021-11-02 22:10:24,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 22:10:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67696 states. [2021-11-02 22:10:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67696 to 67681. [2021-11-02 22:10:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67681 states, 67676 states have (on average 1.8759973993734855) internal successors, (126960), 67680 states have internal predecessors, (126960), 0 states have call successors, (0), 0 states 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 22:10:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67681 states to 67681 states and 126960 transitions. [2021-11-02 22:10:27,786 INFO L78 Accepts]: Start accepts. Automaton has 67681 states and 126960 transitions. Word has length 81 [2021-11-02 22:10:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:27,787 INFO L470 AbstractCegarLoop]: Abstraction has 67681 states and 126960 transitions. [2021-11-02 22:10:27,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 22:10:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 67681 states and 126960 transitions. [2021-11-02 22:10:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:10:27,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:27,791 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:27,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:10:27,791 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash 814231947, now seen corresponding path program 1 times [2021-11-02 22:10:27,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:27,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759489768] [2021-11-02 22:10:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:27,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:27,867 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 22:10:27,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:27,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759489768] [2021-11-02 22:10:27,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759489768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:27,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:27,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:10:27,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280271829] [2021-11-02 22:10:27,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:10:27,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:27,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:10:27,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:10:27,870 INFO L87 Difference]: Start difference. First operand 67681 states and 126960 transitions. Second operand has 5 states, 5 states have (on average 16.2) 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 22:10:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:37,396 INFO L93 Difference]: Finished difference Result 281667 states and 528692 transitions. [2021-11-02 22:10:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:10:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-02 22:10:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:37,891 INFO L225 Difference]: With dead ends: 281667 [2021-11-02 22:10:37,891 INFO L226 Difference]: Without dead ends: 228065 [2021-11-02 22:10:37,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:10:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228065 states. [2021-11-02 22:10:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228065 to 114254. [2021-11-02 22:10:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114254 states, 114249 states have (on average 1.8727953855175976) internal successors, (213965), 114253 states have internal predecessors, (213965), 0 states have call successors, (0), 0 states 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 22:10:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114254 states to 114254 states and 213965 transitions. [2021-11-02 22:10:45,531 INFO L78 Accepts]: Start accepts. Automaton has 114254 states and 213965 transitions. Word has length 81 [2021-11-02 22:10:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:45,531 INFO L470 AbstractCegarLoop]: Abstraction has 114254 states and 213965 transitions. [2021-11-02 22:10:45,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) 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 22:10:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 114254 states and 213965 transitions. [2021-11-02 22:10:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:10:45,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:45,535 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:10:45,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:10:45,536 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-02 22:10:45,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 925261599, now seen corresponding path program 1 times [2021-11-02 22:10:45,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:45,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328647858] [2021-11-02 22:10:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:45,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:45,625 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 22:10:45,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:45,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328647858] [2021-11-02 22:10:45,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328647858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:10:45,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:10:45,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:10:45,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630357358] [2021-11-02 22:10:45,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:10:45,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:10:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:10:45,628 INFO L87 Difference]: Start difference. First operand 114254 states and 213965 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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)