./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0 --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 c1a514ed3c88dbb6b86d895b5ccbc4ee84ef064cf150167d71ca780388d60956 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:58:23,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:58:23,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:58:23,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:58:24,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:58:24,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:58:24,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:58:24,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:58:24,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:58:24,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:58:24,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:58:24,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:58:24,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:58:24,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:58:24,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:58:24,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:58:24,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:58:24,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:58:24,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:58:24,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:58:24,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:58:24,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:58:24,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:58:24,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:58:24,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:58:24,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:58:24,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:58:24,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:58:24,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:58:24,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:58:24,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:58:24,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:58:24,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:58:24,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:58:24,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:58:24,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:58:24,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:58:24,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:58:24,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:58:24,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:58:24,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:58:24,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:58:24,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:58:24,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:58:24,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:58:24,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:58:24,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:58:24,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:58:24,134 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:58:24,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:58:24,134 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:58:24,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:58:24,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:58:24,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:58:24,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:58:24,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:58:24,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:58:24,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:58:24,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:58:24,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:58:24,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:58:24,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:58:24,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:58:24,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:58:24,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:58:24,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:58:24,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:58:24,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:58:24,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:58:24,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:58:24,148 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:58:24,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:58:24,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:58:24,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:58:24,151 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_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1a514ed3c88dbb6b86d895b5ccbc4ee84ef064cf150167d71ca780388d60956 [2021-11-22 14:58:24,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:58:24,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:58:24,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:58:24,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:58:24,559 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:58:24,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c [2021-11-22 14:58:24,658 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/data/0fb5d7994/0dcff23e91c441e59b67386d84526ad9/FLAG14a4c4e09 [2021-11-22 14:58:25,471 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:58:25,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c [2021-11-22 14:58:25,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/data/0fb5d7994/0dcff23e91c441e59b67386d84526ad9/FLAG14a4c4e09 [2021-11-22 14:58:25,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/data/0fb5d7994/0dcff23e91c441e59b67386d84526ad9 [2021-11-22 14:58:25,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:58:25,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:58:25,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:58:25,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:58:25,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:58:25,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:58:25" (1/1) ... [2021-11-22 14:58:25,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b998254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:25, skipping insertion in model container [2021-11-22 14:58:25,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:58:25" (1/1) ... [2021-11-22 14:58:25,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:58:25,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:58:26,453 WARN L230 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_5efb6c42-1f0d-4906-b628-cf0adad066ea/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c[62004,62017] [2021-11-22 14:58:26,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:58:26,474 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:58:26,596 WARN L230 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_5efb6c42-1f0d-4906-b628-cf0adad066ea/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c[62004,62017] [2021-11-22 14:58:26,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:58:26,640 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:58:26,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26 WrapperNode [2021-11-22 14:58:26,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:58:26,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:58:26,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:58:26,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:58:26,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,788 INFO L137 Inliner]: procedures = 125, calls = 198, calls flagged for inlining = 109, calls inlined = 127, statements flattened = 2036 [2021-11-22 14:58:26,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:58:26,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:58:26,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:58:26,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:58:26,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:58:26,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:58:26,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:58:26,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:58:26,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (1/1) ... [2021-11-22 14:58:26,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:58:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:58:27,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:58:27,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:58:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 14:58:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:58:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:58:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:58:27,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:58:27,330 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:58:27,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:58:29,019 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:58:29,054 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:58:29,054 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 14:58:29,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:58:29 BoogieIcfgContainer [2021-11-22 14:58:29,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:58:29,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:58:29,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:58:29,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:58:29,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:58:25" (1/3) ... [2021-11-22 14:58:29,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f962758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:58:29, skipping insertion in model container [2021-11-22 14:58:29,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:58:26" (2/3) ... [2021-11-22 14:58:29,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f962758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:58:29, skipping insertion in model container [2021-11-22 14:58:29,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:58:29" (3/3) ... [2021-11-22 14:58:29,075 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product13.cil.c [2021-11-22 14:58:29,086 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:58:29,086 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-22 14:58:29,175 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:58:29,189 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 [2021-11-22 14:58:29,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-22 14:58:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 459 states, 454 states have (on average 1.7070484581497798) internal successors, (775), 458 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 14:58:29,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:29,277 INFO L514 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] [2021-11-22 14:58:29,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1309993442, now seen corresponding path program 1 times [2021-11-22 14:58:29,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703045402] [2021-11-22 14:58:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:29,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:29,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:29,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703045402] [2021-11-22 14:58:29,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703045402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:29,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:29,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335651365] [2021-11-22 14:58:29,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:29,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:29,786 INFO L87 Difference]: Start difference. First operand has 459 states, 454 states have (on average 1.7070484581497798) internal successors, (775), 458 states have internal predecessors, (775), 0 states have call successors, (0), 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 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:30,005 INFO L93 Difference]: Finished difference Result 1328 states and 2253 transitions. [2021-11-22 14:58:30,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:30,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 14:58:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:30,044 INFO L225 Difference]: With dead ends: 1328 [2021-11-22 14:58:30,045 INFO L226 Difference]: Without dead ends: 797 [2021-11-22 14:58:30,094 INFO L932 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 [2021-11-22 14:58:30,098 INFO L933 BasicCegarLoop]: 1489 mSDtfsCounter, 740 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:30,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 2224 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-11-22 14:58:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 409. [2021-11-22 14:58:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.7037037037037037) internal successors, (690), 408 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 690 transitions. [2021-11-22 14:58:30,204 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 690 transitions. Word has length 53 [2021-11-22 14:58:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:30,205 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 690 transitions. [2021-11-22 14:58:30,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 690 transitions. [2021-11-22 14:58:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 14:58:30,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:30,215 INFO L514 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] [2021-11-22 14:58:30,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:58:30,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1245692375, now seen corresponding path program 1 times [2021-11-22 14:58:30,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:30,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415393322] [2021-11-22 14:58:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:30,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:30,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:30,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415393322] [2021-11-22 14:58:30,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415393322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:30,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:30,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:58:30,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817975544] [2021-11-22 14:58:30,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:30,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:58:30,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:58:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:58:30,444 INFO L87 Difference]: Start difference. First operand 409 states and 690 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:30,677 INFO L93 Difference]: Finished difference Result 1168 states and 1978 transitions. [2021-11-22 14:58:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:58:30,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 14:58:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:30,685 INFO L225 Difference]: With dead ends: 1168 [2021-11-22 14:58:30,685 INFO L226 Difference]: Without dead ends: 782 [2021-11-22 14:58:30,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:58:30,689 INFO L933 BasicCegarLoop]: 1288 mSDtfsCounter, 1334 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 3212 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:30,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 3212 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:58:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-22 14:58:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 409. [2021-11-22 14:58:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.7012345679012346) internal successors, (689), 408 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 689 transitions. [2021-11-22 14:58:30,725 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 689 transitions. Word has length 55 [2021-11-22 14:58:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 689 transitions. [2021-11-22 14:58:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 689 transitions. [2021-11-22 14:58:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 14:58:30,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:30,729 INFO L514 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] [2021-11-22 14:58:30,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:58:30,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash -649438652, now seen corresponding path program 1 times [2021-11-22 14:58:30,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:30,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572832806] [2021-11-22 14:58:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:30,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:30,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:30,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572832806] [2021-11-22 14:58:30,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572832806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:30,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:30,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:30,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526246734] [2021-11-22 14:58:30,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:30,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:30,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:30,808 INFO L87 Difference]: Start difference. First operand 409 states and 689 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:30,891 INFO L93 Difference]: Finished difference Result 797 states and 1349 transitions. [2021-11-22 14:58:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 14:58:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:30,896 INFO L225 Difference]: With dead ends: 797 [2021-11-22 14:58:30,896 INFO L226 Difference]: Without dead ends: 416 [2021-11-22 14:58:30,898 INFO L932 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 [2021-11-22 14:58:30,900 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 662 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 715 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-22 14:58:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 409. [2021-11-22 14:58:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.693827160493827) internal successors, (686), 408 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 686 transitions. [2021-11-22 14:58:30,939 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 686 transitions. Word has length 56 [2021-11-22 14:58:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:30,940 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 686 transitions. [2021-11-22 14:58:30,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 686 transitions. [2021-11-22 14:58:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-22 14:58:30,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:30,945 INFO L514 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] [2021-11-22 14:58:30,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:58:30,946 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1803892225, now seen corresponding path program 1 times [2021-11-22 14:58:30,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:30,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428893222] [2021-11-22 14:58:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:30,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:31,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:31,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428893222] [2021-11-22 14:58:31,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428893222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:31,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:31,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:58:31,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522628594] [2021-11-22 14:58:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:31,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:58:31,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:58:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:58:31,088 INFO L87 Difference]: Start difference. First operand 409 states and 686 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:31,289 INFO L93 Difference]: Finished difference Result 1155 states and 1955 transitions. [2021-11-22 14:58:31,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:58:31,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-22 14:58:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:31,300 INFO L225 Difference]: With dead ends: 1155 [2021-11-22 14:58:31,300 INFO L226 Difference]: Without dead ends: 779 [2021-11-22 14:58:31,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:58:31,314 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 3181 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3181 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:31,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3181 Valid, 1353 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:58:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-22 14:58:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 409. [2021-11-22 14:58:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.691358024691358) internal successors, (685), 408 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 685 transitions. [2021-11-22 14:58:31,358 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 685 transitions. Word has length 58 [2021-11-22 14:58:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:31,360 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 685 transitions. [2021-11-22 14:58:31,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 685 transitions. [2021-11-22 14:58:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 14:58:31,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:31,365 INFO L514 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] [2021-11-22 14:58:31,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:58:31,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1065816430, now seen corresponding path program 1 times [2021-11-22 14:58:31,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:31,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408660675] [2021-11-22 14:58:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:31,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:31,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408660675] [2021-11-22 14:58:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408660675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:31,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:31,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:58:31,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031806585] [2021-11-22 14:58:31,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:58:31,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:58:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:58:31,520 INFO L87 Difference]: Start difference. First operand 409 states and 685 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 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) [2021-11-22 14:58:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:31,713 INFO L93 Difference]: Finished difference Result 1162 states and 1961 transitions. [2021-11-22 14:58:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:58:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 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 [2021-11-22 14:58:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:31,720 INFO L225 Difference]: With dead ends: 1162 [2021-11-22 14:58:31,721 INFO L226 Difference]: Without dead ends: 786 [2021-11-22 14:58:31,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:58:31,726 INFO L933 BasicCegarLoop]: 669 mSDtfsCounter, 3185 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3185 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:31,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3185 Valid, 1356 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:58:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-11-22 14:58:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 409. [2021-11-22 14:58:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.6888888888888889) internal successors, (684), 408 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 684 transitions. [2021-11-22 14:58:31,769 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 684 transitions. Word has length 59 [2021-11-22 14:58:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:31,771 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 684 transitions. [2021-11-22 14:58:31,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 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) [2021-11-22 14:58:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 684 transitions. [2021-11-22 14:58:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-22 14:58:31,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:31,779 INFO L514 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] [2021-11-22 14:58:31,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:58:31,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1798988772, now seen corresponding path program 1 times [2021-11-22 14:58:31,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:31,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795462771] [2021-11-22 14:58:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:31,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:31,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795462771] [2021-11-22 14:58:31,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795462771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:31,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:31,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:31,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587586111] [2021-11-22 14:58:31,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:31,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:31,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:31,879 INFO L87 Difference]: Start difference. First operand 409 states and 684 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:31,918 INFO L93 Difference]: Finished difference Result 568 states and 935 transitions. [2021-11-22 14:58:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-22 14:58:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:31,924 INFO L225 Difference]: With dead ends: 568 [2021-11-22 14:58:31,924 INFO L226 Difference]: Without dead ends: 412 [2021-11-22 14:58:31,925 INFO L932 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 [2021-11-22 14:58:31,926 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1362 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-22 14:58:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 411. [2021-11-22 14:58:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 407 states have (on average 1.6855036855036856) internal successors, (686), 410 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 686 transitions. [2021-11-22 14:58:31,961 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 686 transitions. Word has length 60 [2021-11-22 14:58:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:31,964 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 686 transitions. [2021-11-22 14:58:31,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 686 transitions. [2021-11-22 14:58:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 14:58:31,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:31,966 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:58:31,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:58:31,967 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash 679712770, now seen corresponding path program 1 times [2021-11-22 14:58:31,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433480492] [2021-11-22 14:58:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:31,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:32,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433480492] [2021-11-22 14:58:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433480492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:32,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:32,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:32,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918544995] [2021-11-22 14:58:32,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:32,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:32,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:32,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:32,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:32,065 INFO L87 Difference]: Start difference. First operand 411 states and 686 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:32,135 INFO L93 Difference]: Finished difference Result 1105 states and 1868 transitions. [2021-11-22 14:58:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:32,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-22 14:58:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:32,144 INFO L225 Difference]: With dead ends: 1105 [2021-11-22 14:58:32,144 INFO L226 Difference]: Without dead ends: 732 [2021-11-22 14:58:32,145 INFO L932 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 [2021-11-22 14:58:32,147 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 634 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:32,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 1268 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-11-22 14:58:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 576. [2021-11-22 14:58:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 572 states have (on average 1.715034965034965) internal successors, (981), 575 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 981 transitions. [2021-11-22 14:58:32,202 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 981 transitions. Word has length 66 [2021-11-22 14:58:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:32,202 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 981 transitions. [2021-11-22 14:58:32,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 981 transitions. [2021-11-22 14:58:32,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 14:58:32,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:32,205 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:58:32,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:58:32,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1352005936, now seen corresponding path program 1 times [2021-11-22 14:58:32,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:32,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790989387] [2021-11-22 14:58:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:32,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:32,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:32,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790989387] [2021-11-22 14:58:32,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790989387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:58:32,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775426676] [2021-11-22 14:58:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:32,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:58:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:58:32,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:58:32,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:58:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:58:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:58:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:32,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:58:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:33,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775426676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:58:33,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:58:33,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 14:58:33,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102482647] [2021-11-22 14:58:33,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:58:33,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:58:33,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:33,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:58:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:58:33,106 INFO L87 Difference]: Start difference. First operand 576 states and 981 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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) [2021-11-22 14:58:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:33,342 INFO L93 Difference]: Finished difference Result 2183 states and 3737 transitions. [2021-11-22 14:58:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:58:33,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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 67 [2021-11-22 14:58:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:33,359 INFO L225 Difference]: With dead ends: 2183 [2021-11-22 14:58:33,359 INFO L226 Difference]: Without dead ends: 2027 [2021-11-22 14:58:33,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:58:33,362 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 3167 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3167 SdHoareTripleChecker+Valid, 3906 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:33,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3167 Valid, 3906 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-11-22 14:58:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1559. [2021-11-22 14:58:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1555 states have (on average 1.7639871382636656) internal successors, (2743), 1558 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2743 transitions. [2021-11-22 14:58:33,518 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2743 transitions. Word has length 67 [2021-11-22 14:58:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:33,518 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 2743 transitions. [2021-11-22 14:58:33,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 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) [2021-11-22 14:58:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2743 transitions. [2021-11-22 14:58:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 14:58:33,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:33,530 INFO L514 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] [2021-11-22 14:58:33,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:58:33,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5efb6c42-1f0d-4906-b628-cf0adad066ea/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:58:33,752 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1943388189, now seen corresponding path program 1 times [2021-11-22 14:58:33,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:33,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871678073] [2021-11-22 14:58:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:33,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:33,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:33,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871678073] [2021-11-22 14:58:33,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871678073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:33,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:33,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:33,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529749290] [2021-11-22 14:58:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:33,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:33,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:33,838 INFO L87 Difference]: Start difference. First operand 1559 states and 2743 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:34,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:34,057 INFO L93 Difference]: Finished difference Result 4154 states and 7331 transitions. [2021-11-22 14:58:34,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:34,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-22 14:58:34,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:34,079 INFO L225 Difference]: With dead ends: 4154 [2021-11-22 14:58:34,080 INFO L226 Difference]: Without dead ends: 2695 [2021-11-22 14:58:34,083 INFO L932 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 [2021-11-22 14:58:34,084 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 632 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:34,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1363 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-11-22 14:58:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2539. [2021-11-22 14:58:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2535 states have (on average 1.771992110453649) internal successors, (4492), 2538 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 4492 transitions. [2021-11-22 14:58:34,281 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 4492 transitions. Word has length 73 [2021-11-22 14:58:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:34,282 INFO L470 AbstractCegarLoop]: Abstraction has 2539 states and 4492 transitions. [2021-11-22 14:58:34,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 4492 transitions. [2021-11-22 14:58:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 14:58:34,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:34,289 INFO L514 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] [2021-11-22 14:58:34,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:58:34,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash -35388835, now seen corresponding path program 1 times [2021-11-22 14:58:34,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:34,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290737103] [2021-11-22 14:58:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:34,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:34,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290737103] [2021-11-22 14:58:34,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290737103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:34,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:34,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:34,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303532915] [2021-11-22 14:58:34,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:34,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:34,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:34,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:34,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:34,365 INFO L87 Difference]: Start difference. First operand 2539 states and 4492 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:34,641 INFO L93 Difference]: Finished difference Result 6581 states and 11674 transitions. [2021-11-22 14:58:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-22 14:58:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:34,675 INFO L225 Difference]: With dead ends: 6581 [2021-11-22 14:58:34,675 INFO L226 Difference]: Without dead ends: 4232 [2021-11-22 14:58:34,681 INFO L932 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 [2021-11-22 14:58:34,682 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 630 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:34,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1354 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2021-11-22 14:58:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 4076. [2021-11-22 14:58:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 4072 states have (on average 1.7770137524557956) internal successors, (7236), 4075 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 7236 transitions. [2021-11-22 14:58:35,068 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 7236 transitions. Word has length 74 [2021-11-22 14:58:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:35,070 INFO L470 AbstractCegarLoop]: Abstraction has 4076 states and 7236 transitions. [2021-11-22 14:58:35,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 7236 transitions. [2021-11-22 14:58:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 14:58:35,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:35,079 INFO L514 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] [2021-11-22 14:58:35,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 14:58:35,080 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash -317977473, now seen corresponding path program 1 times [2021-11-22 14:58:35,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:35,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434416589] [2021-11-22 14:58:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:35,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:35,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:35,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434416589] [2021-11-22 14:58:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434416589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:35,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:35,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:35,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192471823] [2021-11-22 14:58:35,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:35,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:35,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:35,159 INFO L87 Difference]: Start difference. First operand 4076 states and 7236 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:35,571 INFO L93 Difference]: Finished difference Result 9885 states and 17556 transitions. [2021-11-22 14:58:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-22 14:58:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:35,621 INFO L225 Difference]: With dead ends: 9885 [2021-11-22 14:58:35,621 INFO L226 Difference]: Without dead ends: 6356 [2021-11-22 14:58:35,628 INFO L932 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 [2021-11-22 14:58:35,629 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 628 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:35,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 1306 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2021-11-22 14:58:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6200. [2021-11-22 14:58:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6200 states, 6196 states have (on average 1.775823111684958) internal successors, (11003), 6199 states have internal predecessors, (11003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6200 states to 6200 states and 11003 transitions. [2021-11-22 14:58:36,180 INFO L78 Accepts]: Start accepts. Automaton has 6200 states and 11003 transitions. Word has length 75 [2021-11-22 14:58:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:36,180 INFO L470 AbstractCegarLoop]: Abstraction has 6200 states and 11003 transitions. [2021-11-22 14:58:36,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6200 states and 11003 transitions. [2021-11-22 14:58:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 14:58:36,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:36,194 INFO L514 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] [2021-11-22 14:58:36,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:58:36,195 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 40940559, now seen corresponding path program 1 times [2021-11-22 14:58:36,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:36,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88997278] [2021-11-22 14:58:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:36,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:36,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:36,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:36,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88997278] [2021-11-22 14:58:36,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88997278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:36,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:36,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:36,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665950363] [2021-11-22 14:58:36,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:36,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:36,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:36,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:36,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:36,282 INFO L87 Difference]: Start difference. First operand 6200 states and 11003 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2021-11-22 14:58:36,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:36,957 INFO L93 Difference]: Finished difference Result 14708 states and 26103 transitions. [2021-11-22 14:58:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:36,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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 [2021-11-22 14:58:36,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:37,029 INFO L225 Difference]: With dead ends: 14708 [2021-11-22 14:58:37,030 INFO L226 Difference]: Without dead ends: 9629 [2021-11-22 14:58:37,040 INFO L932 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 [2021-11-22 14:58:37,043 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 626 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:37,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 1306 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9629 states. [2021-11-22 14:58:37,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9629 to 9473. [2021-11-22 14:58:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9473 states, 9469 states have (on average 1.7729432886260428) internal successors, (16788), 9472 states have internal predecessors, (16788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9473 states to 9473 states and 16788 transitions. [2021-11-22 14:58:37,824 INFO L78 Accepts]: Start accepts. Automaton has 9473 states and 16788 transitions. Word has length 76 [2021-11-22 14:58:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:37,824 INFO L470 AbstractCegarLoop]: Abstraction has 9473 states and 16788 transitions. [2021-11-22 14:58:37,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 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) [2021-11-22 14:58:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 9473 states and 16788 transitions. [2021-11-22 14:58:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:58:37,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:37,838 INFO L514 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] [2021-11-22 14:58:37,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:58:37,839 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1607018097, now seen corresponding path program 1 times [2021-11-22 14:58:37,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71228489] [2021-11-22 14:58:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:37,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:37,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71228489] [2021-11-22 14:58:37,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71228489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:37,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:37,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:37,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873841097] [2021-11-22 14:58:37,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:37,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:37,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:37,905 INFO L87 Difference]: Start difference. First operand 9473 states and 16788 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-11-22 14:58:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:38,846 INFO L93 Difference]: Finished difference Result 23898 states and 42394 transitions. [2021-11-22 14:58:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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 [2021-11-22 14:58:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:38,905 INFO L225 Difference]: With dead ends: 23898 [2021-11-22 14:58:38,905 INFO L226 Difference]: Without dead ends: 15994 [2021-11-22 14:58:38,922 INFO L932 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 [2021-11-22 14:58:38,923 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 624 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:38,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1362 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15994 states. [2021-11-22 14:58:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15994 to 15838. [2021-11-22 14:58:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15838 states, 15834 states have (on average 1.7715043577112544) internal successors, (28050), 15837 states have internal predecessors, (28050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15838 states to 15838 states and 28050 transitions. [2021-11-22 14:58:40,298 INFO L78 Accepts]: Start accepts. Automaton has 15838 states and 28050 transitions. Word has length 77 [2021-11-22 14:58:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 15838 states and 28050 transitions. [2021-11-22 14:58:40,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-11-22 14:58:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15838 states and 28050 transitions. [2021-11-22 14:58:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 14:58:40,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:40,316 INFO L514 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] [2021-11-22 14:58:40,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:58:40,316 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash -873470209, now seen corresponding path program 1 times [2021-11-22 14:58:40,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:40,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847408273] [2021-11-22 14:58:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:40,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:40,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:40,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847408273] [2021-11-22 14:58:40,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847408273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:40,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:40,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987215621] [2021-11-22 14:58:40,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:40,394 INFO L87 Difference]: Start difference. First operand 15838 states and 28050 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-11-22 14:58:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:42,009 INFO L93 Difference]: Finished difference Result 40470 states and 71902 transitions. [2021-11-22 14:58:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 [2021-11-22 14:58:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:42,119 INFO L225 Difference]: With dead ends: 40470 [2021-11-22 14:58:42,120 INFO L226 Difference]: Without dead ends: 27066 [2021-11-22 14:58:42,148 INFO L932 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 [2021-11-22 14:58:42,149 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 622 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:42,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 1353 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27066 states. [2021-11-22 14:58:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27066 to 26910. [2021-11-22 14:58:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26910 states, 26906 states have (on average 1.774028097822047) internal successors, (47732), 26909 states have internal predecessors, (47732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26910 states to 26910 states and 47732 transitions. [2021-11-22 14:58:43,989 INFO L78 Accepts]: Start accepts. Automaton has 26910 states and 47732 transitions. Word has length 78 [2021-11-22 14:58:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 26910 states and 47732 transitions. [2021-11-22 14:58:43,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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) [2021-11-22 14:58:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 26910 states and 47732 transitions. [2021-11-22 14:58:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 14:58:44,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:44,013 INFO L514 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] [2021-11-22 14:58:44,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 14:58:44,013 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash -659813135, now seen corresponding path program 1 times [2021-11-22 14:58:44,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:44,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938265188] [2021-11-22 14:58:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:44,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:44,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:44,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938265188] [2021-11-22 14:58:44,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938265188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:44,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:44,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:44,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307731303] [2021-11-22 14:58:44,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:44,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:44,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:44,269 INFO L87 Difference]: Start difference. First operand 26910 states and 47732 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-22 14:58:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:46,321 INFO L93 Difference]: Finished difference Result 71775 states and 127497 transitions. [2021-11-22 14:58:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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 [2021-11-22 14:58:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:46,668 INFO L225 Difference]: With dead ends: 71775 [2021-11-22 14:58:46,668 INFO L226 Difference]: Without dead ends: 48201 [2021-11-22 14:58:46,730 INFO L932 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 [2021-11-22 14:58:46,732 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 620 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:46,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 1362 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:46,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48201 states. [2021-11-22 14:58:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48201 to 48045. [2021-11-22 14:58:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48045 states, 48041 states have (on average 1.7721529526862472) internal successors, (85136), 48044 states have internal predecessors, (85136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48045 states to 48045 states and 85136 transitions. [2021-11-22 14:58:49,551 INFO L78 Accepts]: Start accepts. Automaton has 48045 states and 85136 transitions. Word has length 79 [2021-11-22 14:58:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:49,551 INFO L470 AbstractCegarLoop]: Abstraction has 48045 states and 85136 transitions. [2021-11-22 14:58:49,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 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) [2021-11-22 14:58:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48045 states and 85136 transitions. [2021-11-22 14:58:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:58:49,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:49,588 INFO L514 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] [2021-11-22 14:58:49,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:58:49,589 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:49,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:49,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1655434317, now seen corresponding path program 1 times [2021-11-22 14:58:49,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:49,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493222687] [2021-11-22 14:58:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:49,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:49,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:49,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493222687] [2021-11-22 14:58:49,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493222687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:49,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:49,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:49,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917200116] [2021-11-22 14:58:49,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:49,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:49,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:49,672 INFO L87 Difference]: Start difference. First operand 48045 states and 85136 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:58:53,137 INFO L93 Difference]: Finished difference Result 122898 states and 217721 transitions. [2021-11-22 14:58:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:58:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 14:58:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:58:53,413 INFO L225 Difference]: With dead ends: 122898 [2021-11-22 14:58:53,414 INFO L226 Difference]: Without dead ends: 80457 [2021-11-22 14:58:53,483 INFO L932 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 [2021-11-22 14:58:53,484 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 618 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:58:53,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1306 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:58:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80457 states. [2021-11-22 14:58:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80457 to 80301. [2021-11-22 14:58:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80301 states, 80297 states have (on average 1.766118285863731) internal successors, (141814), 80300 states have internal predecessors, (141814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80301 states to 80301 states and 141814 transitions. [2021-11-22 14:58:57,578 INFO L78 Accepts]: Start accepts. Automaton has 80301 states and 141814 transitions. Word has length 80 [2021-11-22 14:58:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:58:57,578 INFO L470 AbstractCegarLoop]: Abstraction has 80301 states and 141814 transitions. [2021-11-22 14:58:57,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:58:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 80301 states and 141814 transitions. [2021-11-22 14:58:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 14:58:57,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:58:57,607 INFO L514 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] [2021-11-22 14:58:57,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 14:58:57,608 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:58:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:58:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1065769747, now seen corresponding path program 1 times [2021-11-22 14:58:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:58:57,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671799023] [2021-11-22 14:58:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:58:57,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:58:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:58:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:58:57,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:58:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671799023] [2021-11-22 14:58:57,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671799023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:58:57,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:58:57,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:58:57,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819200950] [2021-11-22 14:58:57,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:58:57,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:58:57,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:58:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:58:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:58:57,675 INFO L87 Difference]: Start difference. First operand 80301 states and 141814 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:03,190 INFO L93 Difference]: Finished difference Result 221340 states and 392063 transitions. [2021-11-22 14:59:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:59:03,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 14:59:03,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:03,600 INFO L225 Difference]: With dead ends: 221340 [2021-11-22 14:59:03,600 INFO L226 Difference]: Without dead ends: 148231 [2021-11-22 14:59:03,681 INFO L932 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 [2021-11-22 14:59:03,682 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 616 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:03,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1353 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:59:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148231 states. [2021-11-22 14:59:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148231 to 148075. [2021-11-22 14:59:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148075 states, 148071 states have (on average 1.768516454943912) internal successors, (261866), 148074 states have internal predecessors, (261866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148075 states to 148075 states and 261866 transitions. [2021-11-22 14:59:11,425 INFO L78 Accepts]: Start accepts. Automaton has 148075 states and 261866 transitions. Word has length 81 [2021-11-22 14:59:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:59:11,426 INFO L470 AbstractCegarLoop]: Abstraction has 148075 states and 261866 transitions. [2021-11-22 14:59:11,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 148075 states and 261866 transitions. [2021-11-22 14:59:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 14:59:11,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:59:11,451 INFO L514 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] [2021-11-22 14:59:11,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 14:59:11,451 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-22 14:59:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:59:11,455 INFO L85 PathProgramCache]: Analyzing trace with hash 7240355, now seen corresponding path program 1 times [2021-11-22 14:59:11,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:59:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838566396] [2021-11-22 14:59:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:59:11,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:59:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:59:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:59:11,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:59:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838566396] [2021-11-22 14:59:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838566396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:59:11,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:59:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:59:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001360476] [2021-11-22 14:59:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:59:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:59:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:59:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:59:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:59:11,514 INFO L87 Difference]: Start difference. First operand 148075 states and 261866 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:59:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:59:19,711 INFO L93 Difference]: Finished difference Result 252422 states and 445235 transitions. [2021-11-22 14:59:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:59:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 14:59:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:59:20,364 INFO L225 Difference]: With dead ends: 252422 [2021-11-22 14:59:20,364 INFO L226 Difference]: Without dead ends: 252266 [2021-11-22 14:59:20,431 INFO L932 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 [2021-11-22 14:59:20,432 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 614 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:59:20,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 1306 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:59:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252266 states.