/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:06:29,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:06:29,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:06:29,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:06:29,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:06:29,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:06:29,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:06:29,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:06:29,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:06:29,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:06:29,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:06:29,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:06:29,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:06:29,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:06:29,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:06:29,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:06:29,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:06:29,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:06:29,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:06:29,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:06:29,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:06:29,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:06:29,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:06:29,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:06:29,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 22:06:29,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 22:06:29,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 22:06:29,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 22:06:29,566 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 22:06:29,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 22:06:29,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 22:06:29,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 22:06:29,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 22:06:29,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 22:06:29,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 22:06:29,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 22:06:29,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 22:06:29,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 22:06:29,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:06:29,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:06:29,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:06:29,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:06:29,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:06:29,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:06:29,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:06:29,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:06:29,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:06:29,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:06:29,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:06:29,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:06:29,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:06:29,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:06:29,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:06:29,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:06:29,598 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:06:29,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:06:29,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:06:29,599 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:06:29,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:06:29,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:06:29,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:06:29,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:06:29,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:06:29,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:06:29,600 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:06:29,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:06:30,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:06:30,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:06:30,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:06:30,017 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:06:30,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-10-23 22:06:30,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8f1cef5/c7800f5fc9984c3e9d24802fd2c253e7/FLAG41033c5cf [2020-10-23 22:06:30,683 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:06:30,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-10-23 22:06:30,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8f1cef5/c7800f5fc9984c3e9d24802fd2c253e7/FLAG41033c5cf [2020-10-23 22:06:31,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e8f1cef5/c7800f5fc9984c3e9d24802fd2c253e7 [2020-10-23 22:06:31,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:06:31,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:06:31,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:06:31,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:06:31,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:06:31,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c9c7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31, skipping insertion in model container [2020-10-23 22:06:31,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:06:31,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:06:31,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:06:31,345 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:06:31,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:06:31,492 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:06:31,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31 WrapperNode [2020-10-23 22:06:31,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:06:31,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:06:31,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:06:31,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:06:31,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... [2020-10-23 22:06:31,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:06:31,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:06:31,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:06:31,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:06:31,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:06:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:06:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:06:31,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:06:31,659 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-23 22:06:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-10-23 22:06:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-10-23 22:06:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-10-23 22:06:31,660 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-10-23 22:06:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-10-23 22:06:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-10-23 22:06:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-10-23 22:06:31,661 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-10-23 22:06:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-10-23 22:06:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-23 22:06:31,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-10-23 22:06:31,663 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-10-23 22:06:31,663 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-10-23 22:06:31,664 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-10-23 22:06:31,664 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-10-23 22:06:31,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-10-23 22:06:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-10-23 22:06:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-10-23 22:06:31,669 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-23 22:06:31,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:06:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:06:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:06:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:06:31,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:06:31,671 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-23 22:06:31,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-10-23 22:06:31,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-10-23 22:06:31,671 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-10-23 22:06:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-10-23 22:06:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:06:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-10-23 22:06:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-10-23 22:06:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-10-23 22:06:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-10-23 22:06:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-10-23 22:06:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-10-23 22:06:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-23 22:06:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-10-23 22:06:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-10-23 22:06:31,674 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-10-23 22:06:31,674 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-10-23 22:06:31,674 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-10-23 22:06:31,674 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-10-23 22:06:31,674 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-10-23 22:06:31,675 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-23 22:06:31,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:06:31,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:06:31,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:06:31,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:06:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:06:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:06:31,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:06:32,522 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:06:32,523 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-23 22:06:32,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:06:32 BoogieIcfgContainer [2020-10-23 22:06:32,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:06:32,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:06:32,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:06:32,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:06:32,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:06:31" (1/3) ... [2020-10-23 22:06:32,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750566db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:06:32, skipping insertion in model container [2020-10-23 22:06:32,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:31" (2/3) ... [2020-10-23 22:06:32,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750566db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:06:32, skipping insertion in model container [2020-10-23 22:06:32,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:06:32" (3/3) ... [2020-10-23 22:06:32,534 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2020-10-23 22:06:32,546 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:06:32,551 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:06:32,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:06:32,587 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:06:32,587 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:06:32,587 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:06:32,587 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:06:32,587 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:06:32,588 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:06:32,588 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:06:32,588 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:06:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states. [2020-10-23 22:06:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-23 22:06:32,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:32,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:32,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1129586116, now seen corresponding path program 1 times [2020-10-23 22:06:32,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:32,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699417558] [2020-10-23 22:06:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:32,734 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,111 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-23 22:06:33,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:06:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:06:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:06:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:06:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:06:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:06:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:06:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:06:33,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699417558] [2020-10-23 22:06:33,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:33,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:06:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73125733] [2020-10-23 22:06:33,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:06:33,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:33,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:06:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:06:33,535 INFO L87 Difference]: Start difference. First operand 296 states. Second operand 8 states. [2020-10-23 22:06:33,946 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-23 22:06:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:36,582 INFO L93 Difference]: Finished difference Result 704 states and 942 transitions. [2020-10-23 22:06:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 22:06:36,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 143 [2020-10-23 22:06:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:36,613 INFO L225 Difference]: With dead ends: 704 [2020-10-23 22:06:36,614 INFO L226 Difference]: Without dead ends: 439 [2020-10-23 22:06:36,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-23 22:06:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-10-23 22:06:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2020-10-23 22:06:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-23 22:06:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 344 transitions. [2020-10-23 22:06:36,797 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 344 transitions. Word has length 143 [2020-10-23 22:06:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:36,798 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 344 transitions. [2020-10-23 22:06:36,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:06:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 344 transitions. [2020-10-23 22:06:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-23 22:06:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:36,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:36,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:06:36,804 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash -671587876, now seen corresponding path program 1 times [2020-10-23 22:06:36,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:36,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630603594] [2020-10-23 22:06:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:36,810 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:36,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:06:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:06:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:06:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:06:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:06:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:06:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:06:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:06:37,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630603594] [2020-10-23 22:06:37,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:37,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:06:37,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975325574] [2020-10-23 22:06:37,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:06:37,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:37,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:06:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:06:37,230 INFO L87 Difference]: Start difference. First operand 282 states and 344 transitions. Second operand 8 states. [2020-10-23 22:06:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:39,787 INFO L93 Difference]: Finished difference Result 670 states and 856 transitions. [2020-10-23 22:06:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 22:06:39,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 143 [2020-10-23 22:06:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:39,799 INFO L225 Difference]: With dead ends: 670 [2020-10-23 22:06:39,799 INFO L226 Difference]: Without dead ends: 438 [2020-10-23 22:06:39,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-23 22:06:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-23 22:06:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 281. [2020-10-23 22:06:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-10-23 22:06:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 342 transitions. [2020-10-23 22:06:39,882 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 342 transitions. Word has length 143 [2020-10-23 22:06:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:39,883 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 342 transitions. [2020-10-23 22:06:39,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:06:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 342 transitions. [2020-10-23 22:06:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-23 22:06:39,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:39,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:39,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:06:39,890 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1212829316, now seen corresponding path program 1 times [2020-10-23 22:06:39,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:39,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100986159] [2020-10-23 22:06:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:39,896 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:06:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:06:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:06:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:06:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:06:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:06:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:06:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:06:40,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100986159] [2020-10-23 22:06:40,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:40,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:06:40,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888546748] [2020-10-23 22:06:40,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:06:40,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:06:40,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:06:40,258 INFO L87 Difference]: Start difference. First operand 281 states and 342 transitions. Second operand 7 states. [2020-10-23 22:06:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:43,418 INFO L93 Difference]: Finished difference Result 1007 states and 1307 transitions. [2020-10-23 22:06:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 22:06:43,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 143 [2020-10-23 22:06:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:43,431 INFO L225 Difference]: With dead ends: 1007 [2020-10-23 22:06:43,431 INFO L226 Difference]: Without dead ends: 780 [2020-10-23 22:06:43,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-23 22:06:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-23 22:06:43,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 528. [2020-10-23 22:06:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-10-23 22:06:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 650 transitions. [2020-10-23 22:06:43,591 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 650 transitions. Word has length 143 [2020-10-23 22:06:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:43,596 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 650 transitions. [2020-10-23 22:06:43,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:06:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 650 transitions. [2020-10-23 22:06:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-23 22:06:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:43,602 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:43,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:06:43,602 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash 441216868, now seen corresponding path program 1 times [2020-10-23 22:06:43,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:43,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670643966] [2020-10-23 22:06:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:44,084 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-10-23 22:06:44,260 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-23 22:06:44,401 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:44,407 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:06:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:06:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:06:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:06:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:06:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:06:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:06:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-23 22:06:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 22:06:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:44,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-10-23 22:06:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-23 22:06:45,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670643966] [2020-10-23 22:06:45,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:45,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 22:06:45,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145841765] [2020-10-23 22:06:45,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 22:06:45,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 22:06:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:06:45,019 INFO L87 Difference]: Start difference. First operand 528 states and 650 transitions. Second operand 10 states. [2020-10-23 22:06:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:50,271 INFO L93 Difference]: Finished difference Result 2275 states and 3121 transitions. [2020-10-23 22:06:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 22:06:50,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 222 [2020-10-23 22:06:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:50,287 INFO L225 Difference]: With dead ends: 2275 [2020-10-23 22:06:50,287 INFO L226 Difference]: Without dead ends: 1802 [2020-10-23 22:06:50,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2020-10-23 22:06:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-10-23 22:06:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1057. [2020-10-23 22:06:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2020-10-23 22:06:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1351 transitions. [2020-10-23 22:06:50,604 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1351 transitions. Word has length 222 [2020-10-23 22:06:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:50,604 INFO L481 AbstractCegarLoop]: Abstraction has 1057 states and 1351 transitions. [2020-10-23 22:06:50,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 22:06:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1351 transitions. [2020-10-23 22:06:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-23 22:06:50,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:50,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:50,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:06:50,611 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash -775451900, now seen corresponding path program 1 times [2020-10-23 22:06:50,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:50,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747721422] [2020-10-23 22:06:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:51,063 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-10-23 22:06:51,185 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-23 22:06:51,269 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:51,271 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:06:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:06:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:06:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:06:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:06:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:06:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:06:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-23 22:06:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 22:06:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-10-23 22:06:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-23 22:06:51,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747721422] [2020-10-23 22:06:51,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:51,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:06:51,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829242414] [2020-10-23 22:06:51,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:06:51,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:51,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:06:51,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:06:51,666 INFO L87 Difference]: Start difference. First operand 1057 states and 1351 transitions. Second operand 9 states. [2020-10-23 22:06:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:06:54,621 INFO L93 Difference]: Finished difference Result 2590 states and 3407 transitions. [2020-10-23 22:06:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 22:06:54,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 222 [2020-10-23 22:06:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:06:54,633 INFO L225 Difference]: With dead ends: 2590 [2020-10-23 22:06:54,633 INFO L226 Difference]: Without dead ends: 1586 [2020-10-23 22:06:54,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-10-23 22:06:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2020-10-23 22:06:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1049. [2020-10-23 22:06:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-10-23 22:06:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1338 transitions. [2020-10-23 22:06:54,956 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1338 transitions. Word has length 222 [2020-10-23 22:06:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:06:54,957 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1338 transitions. [2020-10-23 22:06:54,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:06:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1338 transitions. [2020-10-23 22:06:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-23 22:06:54,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:06:54,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:06:54,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:06:54,963 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:06:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:06:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash -485958965, now seen corresponding path program 1 times [2020-10-23 22:06:54,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:06:54,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047727382] [2020-10-23 22:06:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:06:55,415 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2020-10-23 22:06:55,547 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-23 22:06:55,640 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:06:55,642 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:06:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:06:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:06:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:06:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:06:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:06:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:06:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:06:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-23 22:06:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:55,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 22:06:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:56,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:06:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:56,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:06:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:06:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:56,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:06:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:56,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-10-23 22:06:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:06:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-23 22:06:56,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047727382] [2020-10-23 22:06:56,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:06:56,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 22:06:56,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141332206] [2020-10-23 22:06:56,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 22:06:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:06:56,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 22:06:56,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:06:56,132 INFO L87 Difference]: Start difference. First operand 1049 states and 1338 transitions. Second operand 10 states. [2020-10-23 22:07:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:07:01,001 INFO L93 Difference]: Finished difference Result 4554 states and 6617 transitions. [2020-10-23 22:07:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 22:07:01,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 227 [2020-10-23 22:07:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:07:01,032 INFO L225 Difference]: With dead ends: 4554 [2020-10-23 22:07:01,033 INFO L226 Difference]: Without dead ends: 3559 [2020-10-23 22:07:01,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2020-10-23 22:07:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2020-10-23 22:07:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2134. [2020-10-23 22:07:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2134 states. [2020-10-23 22:07:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 2849 transitions. [2020-10-23 22:07:01,670 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 2849 transitions. Word has length 227 [2020-10-23 22:07:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:07:01,671 INFO L481 AbstractCegarLoop]: Abstraction has 2134 states and 2849 transitions. [2020-10-23 22:07:01,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 22:07:01,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 2849 transitions. [2020-10-23 22:07:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-23 22:07:01,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:07:01,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:07:01,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:07:01,678 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:07:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:07:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -7167836, now seen corresponding path program 1 times [2020-10-23 22:07:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:07:01,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338912704] [2020-10-23 22:07:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:07:02,175 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2020-10-23 22:07:02,311 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-23 22:07:02,384 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:07:02,386 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:07:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:07:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:07:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 22:07:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 22:07:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 22:07:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-23 22:07:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:07:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:07:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:07:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 22:07:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-23 22:07:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-23 22:07:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 22:07:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:07:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 22:07:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 22:07:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 22:07:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-23 22:07:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:07:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-23 22:07:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338912704] [2020-10-23 22:07:02,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:07:02,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 22:07:02,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153717784] [2020-10-23 22:07:02,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 22:07:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:07:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 22:07:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-23 22:07:02,774 INFO L87 Difference]: Start difference. First operand 2134 states and 2849 transitions. Second operand 11 states. [2020-10-23 22:07:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:07:13,529 INFO L93 Difference]: Finished difference Result 11370 states and 16175 transitions. [2020-10-23 22:07:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 22:07:13,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 232 [2020-10-23 22:07:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:07:13,587 INFO L225 Difference]: With dead ends: 11370 [2020-10-23 22:07:13,587 INFO L226 Difference]: Without dead ends: 9288 [2020-10-23 22:07:13,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 22:07:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9288 states. [2020-10-23 22:07:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9288 to 7079. [2020-10-23 22:07:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7079 states. [2020-10-23 22:07:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 9448 transitions. [2020-10-23 22:07:15,974 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 9448 transitions. Word has length 232 [2020-10-23 22:07:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:07:15,975 INFO L481 AbstractCegarLoop]: Abstraction has 7079 states and 9448 transitions. [2020-10-23 22:07:15,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 22:07:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 9448 transitions. [2020-10-23 22:07:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-23 22:07:15,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:07:15,988 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:07:15,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:07:15,988 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:07:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:07:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1250168170, now seen corresponding path program 1 times [2020-10-23 22:07:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:07:15,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293809577] [2020-10-23 22:07:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:07:16,071 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 22:07:16,077 INFO L168 Benchmark]: Toolchain (without parser) took 45031.95 ms. Allocated memory was 168.8 MB in the beginning and 1.1 GB in the end (delta: 934.3 MB). Free memory was 145.3 MB in the beginning and 724.9 MB in the end (delta: -579.6 MB). Peak memory consumption was 354.9 MB. Max. memory is 8.0 GB. [2020-10-23 22:07:16,077 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 168.8 MB. Free memory is still 142.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:07:16,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 443.29 ms. Allocated memory is still 168.8 MB. Free memory was 144.8 MB in the beginning and 130.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:07:16,079 INFO L168 Benchmark]: Boogie Preprocessor took 60.41 ms. Allocated memory is still 168.8 MB. Free memory was 130.3 MB in the beginning and 128.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 22:07:16,082 INFO L168 Benchmark]: RCFGBuilder took 970.10 ms. Allocated memory is still 168.8 MB. Free memory was 128.0 MB in the beginning and 117.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:07:16,083 INFO L168 Benchmark]: TraceAbstraction took 43546.77 ms. Allocated memory was 168.8 MB in the beginning and 1.1 GB in the end (delta: 934.3 MB). Free memory was 117.3 MB in the beginning and 724.9 MB in the end (delta: -607.6 MB). Peak memory consumption was 327.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:07:16,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 168.8 MB. Free memory is still 142.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 443.29 ms. Allocated memory is still 168.8 MB. Free memory was 144.8 MB in the beginning and 130.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.41 ms. Allocated memory is still 168.8 MB. Free memory was 130.3 MB in the beginning and 128.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 970.10 ms. Allocated memory is still 168.8 MB. Free memory was 128.0 MB in the beginning and 117.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 43546.77 ms. Allocated memory was 168.8 MB in the beginning and 1.1 GB in the end (delta: 934.3 MB). Free memory was 117.3 MB in the beginning and 724.9 MB in the end (delta: -607.6 MB). Peak memory consumption was 327.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...