/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/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:01:43,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:01:43,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:01:43,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 22:01:43,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 22:01:43,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 22:01:43,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 22:01:43,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 22:01:43,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 22:01:43,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 22:01:43,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 22:01:43,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 22:01:43,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:01:43,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:01:43,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:01:43,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:01:43,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:01:43,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:01:43,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:01:43,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:01:43,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:01:43,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:01:43,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:01:43,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:01:43,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:01:43,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:01:43,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:01:43,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:01:43,951 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 22:01:43,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:01:43,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:01:43,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:01:43,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:01:43,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:01:43,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:01:43,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:01:43,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:01:43,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:01:43,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:01:43,967 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:01:43,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:01:43,968 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:01:43,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:01:43,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:01:43,968 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:01:43,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:01:43,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:01:43,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:01:43,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:01:43,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:01:43,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:01:43,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:01:44,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:01:44,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:01:44,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:01:44,370 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:01:44,371 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:01:44,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-10-23 22:01:44,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64e57c2d3/f748ee78f6484dfbbc6d2d7b89633854/FLAG5cbb2d560 [2020-10-23 22:01:45,202 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:01:45,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-10-23 22:01:45,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64e57c2d3/f748ee78f6484dfbbc6d2d7b89633854/FLAG5cbb2d560 [2020-10-23 22:01:45,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64e57c2d3/f748ee78f6484dfbbc6d2d7b89633854 [2020-10-23 22:01:45,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:01:45,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:01:45,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:01:45,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:01:45,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:01:45,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510d92fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:45, skipping insertion in model container [2020-10-23 22:01:45,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:01:45" (1/1) ... [2020-10-23 22:01:45,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:01:45,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:01:45,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:01:46,009 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:01:46,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:01:46,157 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:01:46,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46 WrapperNode [2020-10-23 22:01:46,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:01:46,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:01:46,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:01:46,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:01:46,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (1/1) ... [2020-10-23 22:01:46,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:01:46,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:01:46,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:01:46,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:01:46,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (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 22:01:46,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:01:46,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:01:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:01:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:01:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:01:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:01:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:01:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:01:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-10-23 22:01:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-10-23 22:01:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:01:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:01:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:01:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 22:01:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:01:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:01:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:01:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:01:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:01:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 22:01:47,539 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:01:47,540 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 22:01:47,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:01:47 BoogieIcfgContainer [2020-10-23 22:01:47,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:01:47,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:01:47,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:01:47,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:01:47,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:01:45" (1/3) ... [2020-10-23 22:01:47,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c7b099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:01:47, skipping insertion in model container [2020-10-23 22:01:47,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:46" (2/3) ... [2020-10-23 22:01:47,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c7b099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:01:47, skipping insertion in model container [2020-10-23 22:01:47,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:01:47" (3/3) ... [2020-10-23 22:01:47,562 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-10-23 22:01:47,586 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:01:47,595 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:01:47,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:01:47,695 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:01:47,696 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:01:47,696 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:01:47,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:01:47,696 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:01:47,696 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:01:47,697 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:01:47,697 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:01:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states. [2020-10-23 22:01:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-23 22:01:47,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:47,750 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:47,751 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:47,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1556277972, now seen corresponding path program 1 times [2020-10-23 22:01:47,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:47,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541627128] [2020-10-23 22:01:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:47,853 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:01:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:48,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:01:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:48,831 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 22:01:48,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541627128] [2020-10-23 22:01:48,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:01:48,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:01:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24250291] [2020-10-23 22:01:48,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:01:48,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:01:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:01:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:01:48,876 INFO L87 Difference]: Start difference. First operand 371 states. Second operand 5 states. [2020-10-23 22:01:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:01:49,872 INFO L93 Difference]: Finished difference Result 425 states and 434 transitions. [2020-10-23 22:01:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 22:01:49,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-23 22:01:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:01:49,891 INFO L225 Difference]: With dead ends: 425 [2020-10-23 22:01:49,891 INFO L226 Difference]: Without dead ends: 355 [2020-10-23 22:01:49,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:01:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-23 22:01:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 341. [2020-10-23 22:01:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-23 22:01:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2020-10-23 22:01:49,984 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 323 [2020-10-23 22:01:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:01:49,986 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2020-10-23 22:01:49,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:01:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2020-10-23 22:01:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-10-23 22:01:49,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:49,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:49,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:01:49,996 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1891967570, now seen corresponding path program 1 times [2020-10-23 22:01:49,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:49,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397351635] [2020-10-23 22:01:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:50,110 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:01:50,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:01:51,148 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-23 22:01:51,232 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:01:51,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:02:13,545 WARN L193 SmtUtils]: Spent 22.24 s on a formula simplification. DAG size of input: 831 DAG size of output: 828 [2020-10-23 22:02:13,654 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:02:13,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:02:14,881 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 161 DAG size of output: 158 [2020-10-23 22:02:14,976 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:02:14,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:02:16,070 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-23 22:02:17,576 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-23 22:02:17,589 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:02:17,598 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:17,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:18,128 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 22:02:18,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397351635] [2020-10-23 22:02:18,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:18,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:02:18,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91743205] [2020-10-23 22:02:18,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:02:18,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:18,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:02:18,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:02:18,140 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand 6 states. [2020-10-23 22:02:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:19,364 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2020-10-23 22:02:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:02:19,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 340 [2020-10-23 22:02:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:19,377 INFO L225 Difference]: With dead ends: 381 [2020-10-23 22:02:19,377 INFO L226 Difference]: Without dead ends: 372 [2020-10-23 22:02:19,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:02:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-23 22:02:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 358. [2020-10-23 22:02:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-23 22:02:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 358 transitions. [2020-10-23 22:02:19,472 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 358 transitions. Word has length 340 [2020-10-23 22:02:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:19,473 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 358 transitions. [2020-10-23 22:02:19,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:02:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 358 transitions. [2020-10-23 22:02:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-23 22:02:19,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:19,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:19,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:02:19,482 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash -94353940, now seen corresponding path program 2 times [2020-10-23 22:02:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:19,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010511013] [2020-10-23 22:02:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:19,563 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:02:19,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:02:41,157 WARN L193 SmtUtils]: Spent 21.53 s on a formula simplification. DAG size of input: 830 DAG size of output: 827 [2020-10-23 22:02:41,256 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:02:41,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:03:04,060 WARN L193 SmtUtils]: Spent 22.75 s on a formula simplification. DAG size of input: 722 DAG size of output: 719 [2020-10-23 22:03:05,766 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-23 22:03:05,854 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:03:05,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:04:24,250 WARN L193 SmtUtils]: Spent 1.31 m on a formula simplification. DAG size of input: 1412 DAG size of output: 1409 [2020-10-23 22:04:26,027 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2020-10-23 22:04:26,085 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:04:26,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:05:48,103 WARN L193 SmtUtils]: Spent 1.37 m on a formula simplification. DAG size of input: 1415 DAG size of output: 1412 [2020-10-23 22:05:49,693 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-23 22:05:49,743 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:05:49,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:06:14,515 WARN L193 SmtUtils]: Spent 24.71 s on a formula simplification. DAG size of input: 725 DAG size of output: 722 [2020-10-23 22:06:14,618 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:06:14,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:06:37,329 WARN L193 SmtUtils]: Spent 22.64 s on a formula simplification. DAG size of input: 831 DAG size of output: 828 [2020-10-23 22:06:37,392 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:06:37,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:07:02,920 WARN L193 SmtUtils]: Spent 25.47 s on a formula simplification. DAG size of input: 727 DAG size of output: 724 [2020-10-23 22:07:04,520 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-23 22:07:04,570 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:07:04,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:08:27,270 WARN L193 SmtUtils]: Spent 1.38 m on a formula simplification. DAG size of input: 1413 DAG size of output: 1410 [2020-10-23 22:08:29,121 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-23 22:08:29,212 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:08:29,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:08:30,615 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 161 DAG size of output: 158 [2020-10-23 22:08:30,670 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:08:30,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:09:00,186 WARN L193 SmtUtils]: Spent 29.44 s on a formula simplification. DAG size of input: 727 DAG size of output: 724 [2020-10-23 22:09:00,302 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:09:00,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:09:01,602 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-23 22:09:03,382 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 103 DAG size of output: 100 [2020-10-23 22:09:03,384 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:09:03,388 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:09:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:09:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:03,805 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 22:09:03,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010511013] [2020-10-23 22:09:03,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:09:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:09:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117000471] [2020-10-23 22:09:03,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:09:03,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:09:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:09:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:09:03,809 INFO L87 Difference]: Start difference. First operand 358 states and 358 transitions. Second operand 7 states. [2020-10-23 22:09:05,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:09:05,335 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2020-10-23 22:09:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:09:05,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 357 [2020-10-23 22:09:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:09:05,342 INFO L225 Difference]: With dead ends: 398 [2020-10-23 22:09:05,343 INFO L226 Difference]: Without dead ends: 389 [2020-10-23 22:09:05,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-23 22:09:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-23 22:09:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-10-23 22:09:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-23 22:09:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2020-10-23 22:09:05,394 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 357 [2020-10-23 22:09:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:09:05,397 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2020-10-23 22:09:05,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:09:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2020-10-23 22:09:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-23 22:09:05,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:09:05,405 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:05,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:09:05,406 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:09:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:09:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1412331118, now seen corresponding path program 3 times [2020-10-23 22:09:05,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:09:05,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70891131] [2020-10-23 22:09:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:09:05,505 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:09:05,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:09:06,828 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 159 DAG size of output: 156 [2020-10-23 22:09:06,926 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:09:06,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:10:30,034 WARN L193 SmtUtils]: Spent 1.38 m on a formula simplification. DAG size of input: 1410 DAG size of output: 1407 [2020-10-23 22:10:30,262 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-23 22:10:32,008 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-23 22:10:32,109 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:10:32,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:11:00,714 WARN L193 SmtUtils]: Spent 28.51 s on a formula simplification. DAG size of input: 724 DAG size of output: 721 [2020-10-23 22:11:02,693 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2020-10-23 22:11:02,748 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:11:02,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 22:12:38,768 WARN L193 SmtUtils]: Spent 1.60 m on a formula simplification. DAG size of input: 1415 DAG size of output: 1412 [2020-10-23 22:12:40,830 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-23 22:12:40,892 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-23 22:12:40,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts