/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:08:59,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:08:59,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:08:59,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 11:08:59,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 11:08:59,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 11:08:59,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 11:08:59,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 11:08:59,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 11:08:59,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 11:08:59,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 11:08:59,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 11:08:59,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:08:59,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:08:59,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:08:59,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:08:59,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:08:59,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:08:59,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:08:59,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:08:59,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:08:59,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:08:59,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:08:59,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:08:59,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 11:08:59,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 11:08:59,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 11:08:59,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 11:08:59,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 11:08:59,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 11:08:59,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 11:08:59,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 11:08:59,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 11:08:59,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 11:08:59,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 11:08:59,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 11:08:59,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 11:08:59,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 11:08:59,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:08:59,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:08:59,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:08:59,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:08:59,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:08:59,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:08:59,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:08:59,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:08:59,638 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:08:59,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:08:59,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:08:59,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:08:59,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:08:59,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:08:59,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:08:59,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:08:59,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:08:59,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:08:59,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:08:59,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:08:59,639 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:08:59,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:08:59,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:08:59,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:08:59,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:08:59,992 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:08:59,994 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:08:59,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2021-05-06 11:09:00,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e94909f07/35af9c3c59314e80afb48eee800a9e08/FLAG167b2ec94 [2021-05-06 11:09:00,559 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:09:00,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2021-05-06 11:09:00,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e94909f07/35af9c3c59314e80afb48eee800a9e08/FLAG167b2ec94 [2021-05-06 11:09:01,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e94909f07/35af9c3c59314e80afb48eee800a9e08 [2021-05-06 11:09:01,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:09:01,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:09:01,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:09:01,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:09:01,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:09:01,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d6f9a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01, skipping insertion in model container [2021-05-06 11:09:01,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:09:01,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:09:01,233 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c[446,459] [2021-05-06 11:09:01,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:09:01,303 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:09:01,324 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c[446,459] [2021-05-06 11:09:01,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:09:01,380 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:09:01,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01 WrapperNode [2021-05-06 11:09:01,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:09:01,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:09:01,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:09:01,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:09:01,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (1/1) ... [2021-05-06 11:09:01,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:09:01,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:09:01,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:09:01,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:09:01,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (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 [2021-05-06 11:09:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:09:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:09:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:09:01,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:09:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:09:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:09:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:09:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:09:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:09:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:09:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:09:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:09:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:09:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:09:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:09:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:09:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:09:01,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:09:01,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:09:01,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:09:01,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:09:01,928 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-05-06 11:09:01,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:09:01 BoogieIcfgContainer [2021-05-06 11:09:01,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:09:01,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:09:01,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:09:01,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:09:01,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:09:01" (1/3) ... [2021-05-06 11:09:01,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135653bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:09:01, skipping insertion in model container [2021-05-06 11:09:01,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:09:01" (2/3) ... [2021-05-06 11:09:01,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@135653bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:09:01, skipping insertion in model container [2021-05-06 11:09:01,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:09:01" (3/3) ... [2021-05-06 11:09:01,936 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2021-05-06 11:09:01,941 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:09:01,944 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:09:01,957 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:09:01,974 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:09:01,975 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:09:01,975 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:09:01,975 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:09:01,975 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:09:01,975 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:09:01,975 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:09:01,975 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:09:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 11:09:01,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:01,994 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:01,995 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2021-05-06 11:09:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:02,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693963443] [2021-05-06 11:09:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:02,058 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:02,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:02,262 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:02,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693963443] [2021-05-06 11:09:02,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [693963443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:02,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:02,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:09:02,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238038439] [2021-05-06 11:09:02,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:09:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:09:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:09:02,278 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:02,426 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2021-05-06 11:09:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:09:02,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 11:09:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:02,433 INFO L225 Difference]: With dead ends: 65 [2021-05-06 11:09:02,433 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 11:09:02,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:09:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 11:09:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 11:09:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-06 11:09:02,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2021-05-06 11:09:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:02,488 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-06 11:09:02,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-06 11:09:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 11:09:02,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:02,489 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:02,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:09:02,489 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2021-05-06 11:09:02,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:02,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660405725] [2021-05-06 11:09:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:02,492 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:02,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:02,644 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:02,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660405725] [2021-05-06 11:09:02,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1660405725] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:02,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:02,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:09:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789504331] [2021-05-06 11:09:02,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:09:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:09:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:09:02,646 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:02,830 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-05-06 11:09:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:09:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 11:09:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:02,835 INFO L225 Difference]: With dead ends: 80 [2021-05-06 11:09:02,835 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 11:09:02,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:09:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 11:09:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-05-06 11:09:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 11:09:02,852 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2021-05-06 11:09:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:02,852 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 11:09:02,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 11:09:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 11:09:02,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:02,853 INFO L523 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] [2021-05-06 11:09:02,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:09:02,853 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:02,854 INFO L82 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2021-05-06 11:09:02,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:02,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856253986] [2021-05-06 11:09:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:02,870 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:02,870 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:02,874 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:03,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:03,149 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:03,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856253986] [2021-05-06 11:09:03,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [856253986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:03,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:03,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:09:03,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879552344] [2021-05-06 11:09:03,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:09:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:09:03,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:09:03,152 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:03,507 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2021-05-06 11:09:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:09:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 11:09:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:03,511 INFO L225 Difference]: With dead ends: 78 [2021-05-06 11:09:03,511 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 11:09:03,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:09:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 11:09:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-05-06 11:09:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-05-06 11:09:03,530 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2021-05-06 11:09:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:03,530 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-05-06 11:09:03,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-05-06 11:09:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 11:09:03,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:03,532 INFO L523 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] [2021-05-06 11:09:03,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:09:03,532 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2021-05-06 11:09:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:03,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396600832] [2021-05-06 11:09:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:03,537 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:03,538 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:03,539 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:03,622 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:03,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396600832] [2021-05-06 11:09:03,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [396600832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:03,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:03,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:09:03,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637188403] [2021-05-06 11:09:03,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:09:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:09:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:09:03,625 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:03,709 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-05-06 11:09:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:09:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 11:09:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:03,711 INFO L225 Difference]: With dead ends: 82 [2021-05-06 11:09:03,712 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 11:09:03,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:09:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 11:09:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-06 11:09:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-05-06 11:09:03,720 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2021-05-06 11:09:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:03,721 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-05-06 11:09:03,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-05-06 11:09:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 11:09:03,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:03,722 INFO L523 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] [2021-05-06 11:09:03,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:09:03,722 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2021-05-06 11:09:03,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:03,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577092573] [2021-05-06 11:09:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:03,727 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:03,727 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:03,728 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:03,847 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:03,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577092573] [2021-05-06 11:09:03,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577092573] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:03,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:03,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:09:03,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821102473] [2021-05-06 11:09:03,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:09:03,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:03,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:09:03,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:09:03,848 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:03,998 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2021-05-06 11:09:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:09:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 11:09:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:04,017 INFO L225 Difference]: With dead ends: 130 [2021-05-06 11:09:04,017 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 11:09:04,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:09:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 11:09:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-05-06 11:09:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-05-06 11:09:04,028 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2021-05-06 11:09:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:04,028 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-05-06 11:09:04,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-05-06 11:09:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 11:09:04,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:04,030 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:04,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:09:04,030 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:04,030 INFO L82 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2021-05-06 11:09:04,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:04,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417334167] [2021-05-06 11:09:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:04,037 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:04,038 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:04,039 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:04,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:04,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:04,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417334167] [2021-05-06 11:09:04,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417334167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:04,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:04,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:09:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332212204] [2021-05-06 11:09:04,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:09:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:09:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:09:04,123 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:04,397 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2021-05-06 11:09:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:09:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 11:09:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:04,400 INFO L225 Difference]: With dead ends: 178 [2021-05-06 11:09:04,400 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 11:09:04,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:09:04,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 11:09:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2021-05-06 11:09:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2021-05-06 11:09:04,423 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2021-05-06 11:09:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:04,423 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2021-05-06 11:09:04,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2021-05-06 11:09:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 11:09:04,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:04,425 INFO L523 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] [2021-05-06 11:09:04,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:09:04,425 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2021-05-06 11:09:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:04,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649122748] [2021-05-06 11:09:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:04,428 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:04,429 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:04,430 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:05,081 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:05,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649122748] [2021-05-06 11:09:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [649122748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:05,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:05,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:09:05,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326626019] [2021-05-06 11:09:05,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:09:05,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:05,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:09:05,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:09:05,083 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:05,704 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2021-05-06 11:09:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 11:09:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 11:09:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:05,707 INFO L225 Difference]: With dead ends: 177 [2021-05-06 11:09:05,707 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 11:09:05,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:09:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 11:09:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2021-05-06 11:09:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-05-06 11:09:05,723 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2021-05-06 11:09:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:05,724 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-05-06 11:09:05,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-05-06 11:09:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 11:09:05,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:05,725 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:05,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:09:05,725 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:05,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 2 times [2021-05-06 11:09:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:05,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280671083] [2021-05-06 11:09:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:05,732 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:05,732 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:05,734 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:05,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:05,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280671083] [2021-05-06 11:09:05,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280671083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:05,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:05,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 11:09:05,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093455168] [2021-05-06 11:09:05,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 11:09:05,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:05,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 11:09:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:09:05,914 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:06,360 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2021-05-06 11:09:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:09:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 11:09:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:06,362 INFO L225 Difference]: With dead ends: 218 [2021-05-06 11:09:06,362 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 11:09:06,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:09:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 11:09:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2021-05-06 11:09:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2021-05-06 11:09:06,381 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2021-05-06 11:09:06,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:06,382 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2021-05-06 11:09:06,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2021-05-06 11:09:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 11:09:06,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:06,383 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:06,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:09:06,384 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2021-05-06 11:09:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:06,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497571783] [2021-05-06 11:09:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:06,387 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,387 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,388 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-06 11:09:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:06,464 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:06,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497571783] [2021-05-06 11:09:06,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [497571783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:06,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:06,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:09:06,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776521547] [2021-05-06 11:09:06,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:09:06,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:06,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:09:06,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:09:06,465 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:06,666 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2021-05-06 11:09:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:09:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-06 11:09:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:06,668 INFO L225 Difference]: With dead ends: 254 [2021-05-06 11:09:06,668 INFO L226 Difference]: Without dead ends: 185 [2021-05-06 11:09:06,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:09:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-06 11:09:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2021-05-06 11:09:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2021-05-06 11:09:06,685 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2021-05-06 11:09:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:06,686 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2021-05-06 11:09:06,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2021-05-06 11:09:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:09:06,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:06,687 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:06,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-06 11:09:06,687 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 2 times [2021-05-06 11:09:06,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:06,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768835764] [2021-05-06 11:09:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:06,691 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:06,691 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:06,692 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:06,772 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:06,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768835764] [2021-05-06 11:09:06,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [768835764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:06,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:06,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:09:06,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256991647] [2021-05-06 11:09:06,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:09:06,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:06,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:09:06,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:09:06,774 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:07,038 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2021-05-06 11:09:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:09:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 11:09:07,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:07,040 INFO L225 Difference]: With dead ends: 240 [2021-05-06 11:09:07,040 INFO L226 Difference]: Without dead ends: 219 [2021-05-06 11:09:07,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-06 11:09:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-06 11:09:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2021-05-06 11:09:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2021-05-06 11:09:07,063 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2021-05-06 11:09:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:07,064 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2021-05-06 11:09:07,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2021-05-06 11:09:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:09:07,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:07,065 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:07,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-06 11:09:07,065 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 3 times [2021-05-06 11:09:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:07,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603396016] [2021-05-06 11:09:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:07,073 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:07,073 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:07,074 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:07,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:07,130 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:07,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603396016] [2021-05-06 11:09:07,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603396016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:07,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:07,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:09:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320601249] [2021-05-06 11:09:07,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:09:07,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:09:07,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:09:07,131 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:07,242 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2021-05-06 11:09:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:09:07,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 11:09:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:07,244 INFO L225 Difference]: With dead ends: 248 [2021-05-06 11:09:07,244 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 11:09:07,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:09:07,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 11:09:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2021-05-06 11:09:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.297709923664122) internal successors, (170), 133 states have internal predecessors, (170), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2021-05-06 11:09:07,262 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 34 [2021-05-06 11:09:07,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:07,262 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2021-05-06 11:09:07,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2021-05-06 11:09:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 11:09:07,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:07,263 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:07,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-06 11:09:07,263 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 4 times [2021-05-06 11:09:07,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:07,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167096181] [2021-05-06 11:09:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:07,274 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:07,274 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:07,275 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:07,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:07,364 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:07,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167096181] [2021-05-06 11:09:07,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1167096181] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:07,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:07,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:09:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744865606] [2021-05-06 11:09:07,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:09:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:09:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:09:07,366 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:07,805 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-06 11:09:07,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:09:07,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 11:09:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:07,807 INFO L225 Difference]: With dead ends: 346 [2021-05-06 11:09:07,807 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 11:09:07,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:09:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 11:09:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 173. [2021-05-06 11:09:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 166 states have internal predecessors, (214), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2021-05-06 11:09:07,831 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 34 [2021-05-06 11:09:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:07,831 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2021-05-06 11:09:07,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2021-05-06 11:09:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 11:09:07,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:07,832 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:07,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-06 11:09:07,833 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 3 times [2021-05-06 11:09:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318674507] [2021-05-06 11:09:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:07,836 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:07,836 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:07,837 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:08,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:08,530 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:08,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318674507] [2021-05-06 11:09:08,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318674507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:08,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:08,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-06 11:09:08,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145887593] [2021-05-06 11:09:08,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 11:09:08,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 11:09:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-06 11:09:08,532 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:09,065 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2021-05-06 11:09:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:09:09,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 11:09:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:09,067 INFO L225 Difference]: With dead ends: 200 [2021-05-06 11:09:09,067 INFO L226 Difference]: Without dead ends: 181 [2021-05-06 11:09:09,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-05-06 11:09:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-06 11:09:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2021-05-06 11:09:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 169 states have internal predecessors, (218), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2021-05-06 11:09:09,101 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 37 [2021-05-06 11:09:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:09,101 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2021-05-06 11:09:09,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2021-05-06 11:09:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 11:09:09,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:09,102 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:09,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-06 11:09:09,103 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:09,103 INFO L82 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2021-05-06 11:09:09,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:09,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681490553] [2021-05-06 11:09:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:09,114 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:09,115 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:09,116 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:09,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:09,191 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:09,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681490553] [2021-05-06 11:09:09,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [681490553] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:09,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:09,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:09:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762174276] [2021-05-06 11:09:09,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:09:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:09:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:09:09,194 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:09,311 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2021-05-06 11:09:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:09:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 11:09:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:09,314 INFO L225 Difference]: With dead ends: 280 [2021-05-06 11:09:09,314 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 11:09:09,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:09:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 11:09:09,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2021-05-06 11:09:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 171 states have internal predecessors, (217), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2021-05-06 11:09:09,340 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 37 [2021-05-06 11:09:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:09,341 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2021-05-06 11:09:09,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2021-05-06 11:09:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 11:09:09,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:09,342 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:09,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-06 11:09:09,342 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 5 times [2021-05-06 11:09:09,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:09,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99077863] [2021-05-06 11:09:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:09,351 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:09,351 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:09,352 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:09,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:09,555 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:09,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99077863] [2021-05-06 11:09:09,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [99077863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:09,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:09,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:09:09,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643565369] [2021-05-06 11:09:09,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:09:09,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:09,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:09:09,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:09:09,557 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:09,959 INFO L93 Difference]: Finished difference Result 268 states and 341 transitions. [2021-05-06 11:09:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 11:09:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 11:09:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:09,962 INFO L225 Difference]: With dead ends: 268 [2021-05-06 11:09:09,962 INFO L226 Difference]: Without dead ends: 266 [2021-05-06 11:09:09,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:09:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-06 11:09:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 162. [2021-05-06 11:09:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 155 states have internal predecessors, (196), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2021-05-06 11:09:10,007 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 37 [2021-05-06 11:09:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:10,008 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2021-05-06 11:09:10,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:10,008 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2021-05-06 11:09:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 11:09:10,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:10,009 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:10,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-06 11:09:10,009 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:10,010 INFO L82 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2021-05-06 11:09:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:10,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766123813] [2021-05-06 11:09:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:10,015 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:10,015 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:10,016 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:10,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:10,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-06 11:09:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:10,221 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766123813] [2021-05-06 11:09:10,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [766123813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:10,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:10,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:09:10,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565983015] [2021-05-06 11:09:10,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:09:10,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:09:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:09:10,223 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:10,750 INFO L93 Difference]: Finished difference Result 312 states and 399 transitions. [2021-05-06 11:09:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 11:09:10,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-05-06 11:09:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:10,753 INFO L225 Difference]: With dead ends: 312 [2021-05-06 11:09:10,753 INFO L226 Difference]: Without dead ends: 310 [2021-05-06 11:09:10,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-06 11:09:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-06 11:09:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 231. [2021-05-06 11:09:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 222 states have internal predecessors, (281), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 11:09:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 293 transitions. [2021-05-06 11:09:10,810 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 293 transitions. Word has length 39 [2021-05-06 11:09:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:10,810 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 293 transitions. [2021-05-06 11:09:10,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 293 transitions. [2021-05-06 11:09:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 11:09:10,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:10,812 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:10,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-06 11:09:10,812 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 4 times [2021-05-06 11:09:10,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:10,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559612936] [2021-05-06 11:09:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:10,815 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:10,816 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:10,817 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:10,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:10,912 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559612936] [2021-05-06 11:09:10,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [559612936] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:10,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:10,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:09:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374974658] [2021-05-06 11:09:10,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:09:10,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:09:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:09:10,913 INFO L87 Difference]: Start difference. First operand 231 states and 293 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:11,312 INFO L93 Difference]: Finished difference Result 498 states and 642 transitions. [2021-05-06 11:09:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 11:09:11,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 11:09:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:11,315 INFO L225 Difference]: With dead ends: 498 [2021-05-06 11:09:11,316 INFO L226 Difference]: Without dead ends: 466 [2021-05-06 11:09:11,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:09:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-06 11:09:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 315. [2021-05-06 11:09:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 303 states have (on average 1.3135313531353134) internal successors, (398), 306 states have internal predecessors, (398), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 11:09:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2021-05-06 11:09:11,373 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 40 [2021-05-06 11:09:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:11,373 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2021-05-06 11:09:11,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2021-05-06 11:09:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 11:09:11,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:11,374 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:11,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-06 11:09:11,375 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 2 times [2021-05-06 11:09:11,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:11,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202099735] [2021-05-06 11:09:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:11,380 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:11,380 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:11,381 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:11,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:11,966 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202099735] [2021-05-06 11:09:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [202099735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:11,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:11,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 11:09:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445678756] [2021-05-06 11:09:11,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 11:09:11,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 11:09:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:09:11,967 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:12,960 INFO L93 Difference]: Finished difference Result 734 states and 962 transitions. [2021-05-06 11:09:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:09:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 11:09:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:12,965 INFO L225 Difference]: With dead ends: 734 [2021-05-06 11:09:12,966 INFO L226 Difference]: Without dead ends: 732 [2021-05-06 11:09:12,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-05-06 11:09:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-06 11:09:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 490. [2021-05-06 11:09:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 478 states have (on average 1.3577405857740585) internal successors, (649), 481 states have internal predecessors, (649), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 11:09:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 661 transitions. [2021-05-06 11:09:13,056 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 661 transitions. Word has length 40 [2021-05-06 11:09:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:13,056 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 661 transitions. [2021-05-06 11:09:13,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 661 transitions. [2021-05-06 11:09:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 11:09:13,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:13,057 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 11:09:13,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-06 11:09:13,058 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:13,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1909650267, now seen corresponding path program 5 times [2021-05-06 11:09:13,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:13,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950081019] [2021-05-06 11:09:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:13,079 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:13,079 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:13,080 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:14,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:14,207 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:14,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950081019] [2021-05-06 11:09:14,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [950081019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:14,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:14,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-06 11:09:14,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007371704] [2021-05-06 11:09:14,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 11:09:14,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:14,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 11:09:14,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-06 11:09:14,208 INFO L87 Difference]: Start difference. First operand 490 states and 661 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:14,923 INFO L93 Difference]: Finished difference Result 520 states and 694 transitions. [2021-05-06 11:09:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 11:09:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 11:09:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:14,925 INFO L225 Difference]: With dead ends: 520 [2021-05-06 11:09:14,925 INFO L226 Difference]: Without dead ends: 498 [2021-05-06 11:09:14,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:09:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-06 11:09:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 493. [2021-05-06 11:09:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 481 states have (on average 1.3575883575883576) internal successors, (653), 484 states have internal predecessors, (653), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 11:09:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 665 transitions. [2021-05-06 11:09:15,010 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 665 transitions. Word has length 43 [2021-05-06 11:09:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:15,011 INFO L480 AbstractCegarLoop]: Abstraction has 493 states and 665 transitions. [2021-05-06 11:09:15,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 665 transitions. [2021-05-06 11:09:15,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 11:09:15,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:15,012 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:15,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-06 11:09:15,013 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:15,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:15,013 INFO L82 PathProgramCache]: Analyzing trace with hash -383539670, now seen corresponding path program 2 times [2021-05-06 11:09:15,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:15,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135005593] [2021-05-06 11:09:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:15,021 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:15,021 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:15,022 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 11:09:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:15,118 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:15,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135005593] [2021-05-06 11:09:15,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [135005593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:15,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:15,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:09:15,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660531705] [2021-05-06 11:09:15,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:09:15,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:15,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:09:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:09:15,120 INFO L87 Difference]: Start difference. First operand 493 states and 665 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:15,428 INFO L93 Difference]: Finished difference Result 844 states and 1125 transitions. [2021-05-06 11:09:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:09:15,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-05-06 11:09:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:15,432 INFO L225 Difference]: With dead ends: 844 [2021-05-06 11:09:15,432 INFO L226 Difference]: Without dead ends: 535 [2021-05-06 11:09:15,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:09:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-05-06 11:09:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 407. [2021-05-06 11:09:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 395 states have (on average 1.3341772151898734) internal successors, (527), 398 states have internal predecessors, (527), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 11:09:15,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 539 transitions. [2021-05-06 11:09:15,504 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 539 transitions. Word has length 45 [2021-05-06 11:09:15,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:15,505 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 539 transitions. [2021-05-06 11:09:15,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:15,505 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 539 transitions. [2021-05-06 11:09:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 11:09:15,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:15,506 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:15,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-06 11:09:15,506 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:15,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:15,506 INFO L82 PathProgramCache]: Analyzing trace with hash 651363238, now seen corresponding path program 3 times [2021-05-06 11:09:15,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:15,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367160716] [2021-05-06 11:09:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:15,513 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:15,513 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:15,515 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-06 11:09:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-06 11:09:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:15,604 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367160716] [2021-05-06 11:09:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1367160716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:15,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:15,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 11:09:15,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085146818] [2021-05-06 11:09:15,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 11:09:15,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:15,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 11:09:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:09:15,606 INFO L87 Difference]: Start difference. First operand 407 states and 539 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:15,965 INFO L93 Difference]: Finished difference Result 775 states and 1004 transitions. [2021-05-06 11:09:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 11:09:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-05-06 11:09:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:15,969 INFO L225 Difference]: With dead ends: 775 [2021-05-06 11:09:15,969 INFO L226 Difference]: Without dead ends: 595 [2021-05-06 11:09:15,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 11:09:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-05-06 11:09:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 440. [2021-05-06 11:09:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 426 states have (on average 1.307511737089202) internal successors, (557), 430 states have internal predecessors, (557), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 11:09:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2021-05-06 11:09:16,053 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 47 [2021-05-06 11:09:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:16,054 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2021-05-06 11:09:16,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:09:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2021-05-06 11:09:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:09:16,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:16,055 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 11:09:16,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-06 11:09:16,056 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1904691350, now seen corresponding path program 6 times [2021-05-06 11:09:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:16,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761524827] [2021-05-06 11:09:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:16,060 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:16,060 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:16,061 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:16,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:16,167 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:16,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761524827] [2021-05-06 11:09:16,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761524827] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:16,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:16,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-06 11:09:16,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067951491] [2021-05-06 11:09:16,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 11:09:16,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 11:09:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 11:09:16,168 INFO L87 Difference]: Start difference. First operand 440 states and 573 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:16,670 INFO L93 Difference]: Finished difference Result 1037 states and 1338 transitions. [2021-05-06 11:09:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 11:09:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 11:09:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:16,675 INFO L225 Difference]: With dead ends: 1037 [2021-05-06 11:09:16,675 INFO L226 Difference]: Without dead ends: 997 [2021-05-06 11:09:16,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-05-06 11:09:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-05-06 11:09:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 597. [2021-05-06 11:09:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 583 states have (on average 1.3379073756432247) internal successors, (780), 587 states have internal predecessors, (780), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 11:09:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2021-05-06 11:09:16,798 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 46 [2021-05-06 11:09:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:16,799 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2021-05-06 11:09:16,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2021-05-06 11:09:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:09:16,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:16,800 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:16,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-06 11:09:16,801 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1776596685, now seen corresponding path program 3 times [2021-05-06 11:09:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:16,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642086686] [2021-05-06 11:09:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:16,806 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:16,806 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:16,807 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:16,876 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:16,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642086686] [2021-05-06 11:09:16,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [642086686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:16,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:16,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:09:16,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203839016] [2021-05-06 11:09:16,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:09:16,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:16,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:09:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:09:16,878 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:17,180 INFO L93 Difference]: Finished difference Result 1132 states and 1484 transitions. [2021-05-06 11:09:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:09:17,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 11:09:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:17,183 INFO L225 Difference]: With dead ends: 1132 [2021-05-06 11:09:17,183 INFO L226 Difference]: Without dead ends: 849 [2021-05-06 11:09:17,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:09:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-05-06 11:09:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 687. [2021-05-06 11:09:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 673 states have (on average 1.325408618127786) internal successors, (892), 677 states have internal predecessors, (892), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 11:09:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 908 transitions. [2021-05-06 11:09:17,314 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 908 transitions. Word has length 46 [2021-05-06 11:09:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:17,314 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 908 transitions. [2021-05-06 11:09:17,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 908 transitions. [2021-05-06 11:09:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 11:09:17,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:17,316 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:17,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-06 11:09:17,316 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:17,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash -218065925, now seen corresponding path program 4 times [2021-05-06 11:09:17,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:17,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495917798] [2021-05-06 11:09:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:17,322 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:17,322 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:17,323 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:17,388 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:17,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495917798] [2021-05-06 11:09:17,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495917798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:17,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:17,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:09:17,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71251572] [2021-05-06 11:09:17,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:09:17,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:17,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:09:17,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:09:17,390 INFO L87 Difference]: Start difference. First operand 687 states and 908 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:17,699 INFO L93 Difference]: Finished difference Result 883 states and 1130 transitions. [2021-05-06 11:09:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:09:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 11:09:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:17,704 INFO L225 Difference]: With dead ends: 883 [2021-05-06 11:09:17,704 INFO L226 Difference]: Without dead ends: 680 [2021-05-06 11:09:17,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:09:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-05-06 11:09:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 620. [2021-05-06 11:09:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 606 states have (on average 1.297029702970297) internal successors, (786), 610 states have internal predecessors, (786), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 11:09:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 802 transitions. [2021-05-06 11:09:17,850 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 802 transitions. Word has length 46 [2021-05-06 11:09:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:17,850 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 802 transitions. [2021-05-06 11:09:17,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:09:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 802 transitions. [2021-05-06 11:09:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 11:09:17,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:17,851 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 11:09:17,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-06 11:09:17,852 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:17,852 INFO L82 PathProgramCache]: Analyzing trace with hash 983274622, now seen corresponding path program 1 times [2021-05-06 11:09:17,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:17,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000776948] [2021-05-06 11:09:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:17,858 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:17,858 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:17,860 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:18,734 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-05-06 11:09:18,936 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2021-05-06 11:09:19,063 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-05-06 11:09:19,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:09:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:19,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-06 11:09:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:09:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:09:19,381 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:09:19,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000776948] [2021-05-06 11:09:19,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000776948] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:09:19,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:09:19,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-06 11:09:19,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648752504] [2021-05-06 11:09:19,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 11:09:19,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:09:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 11:09:19,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-06 11:09:19,383 INFO L87 Difference]: Start difference. First operand 620 states and 802 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:19,747 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-05-06 11:09:19,894 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-05-06 11:09:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:09:20,831 INFO L93 Difference]: Finished difference Result 773 states and 988 transitions. [2021-05-06 11:09:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 11:09:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-05-06 11:09:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:09:20,833 INFO L225 Difference]: With dead ends: 773 [2021-05-06 11:09:20,833 INFO L226 Difference]: Without dead ends: 724 [2021-05-06 11:09:20,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1937.6ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-05-06 11:09:20,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-05-06 11:09:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 642. [2021-05-06 11:09:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 628 states have (on average 1.2961783439490446) internal successors, (814), 632 states have internal predecessors, (814), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 11:09:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 830 transitions. [2021-05-06 11:09:20,963 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 830 transitions. Word has length 48 [2021-05-06 11:09:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:09:20,963 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 830 transitions. [2021-05-06 11:09:20,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 11:09:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 830 transitions. [2021-05-06 11:09:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 11:09:20,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:09:20,965 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:09:20,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-06 11:09:20,965 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:09:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:09:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash 849261116, now seen corresponding path program 1 times [2021-05-06 11:09:20,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:09:20,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806291148] [2021-05-06 11:09:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:09:20,974 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:09:20,974 WARN L75 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-06 11:09:20,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:09:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:09:20,995 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:09:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:09:21,031 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:09:21,062 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-06 11:09:21,062 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:09:21,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-06 11:09:21,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:09:21 BoogieIcfgContainer [2021-05-06 11:09:21,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:09:21,086 INFO L168 Benchmark]: Toolchain (without parser) took 20037.98 ms. Allocated memory was 188.7 MB in the beginning and 471.9 MB in the end (delta: 283.1 MB). Free memory was 154.0 MB in the beginning and 312.6 MB in the end (delta: -158.6 MB). Peak memory consumption was 124.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:09:21,086 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory is still 170.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:09:21,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.40 ms. Allocated memory is still 188.7 MB. Free memory was 153.8 MB in the beginning and 170.3 MB in the end (delta: -16.4 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:09:21,086 INFO L168 Benchmark]: Boogie Preprocessor took 63.38 ms. Allocated memory is still 188.7 MB. Free memory was 170.3 MB in the beginning and 168.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:09:21,086 INFO L168 Benchmark]: RCFGBuilder took 482.47 ms. Allocated memory is still 188.7 MB. Free memory was 168.2 MB in the beginning and 145.5 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:09:21,086 INFO L168 Benchmark]: TraceAbstraction took 19154.12 ms. Allocated memory was 188.7 MB in the beginning and 471.9 MB in the end (delta: 283.1 MB). Free memory was 145.1 MB in the beginning and 312.6 MB in the end (delta: -167.5 MB). Peak memory consumption was 116.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:09:21,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory is still 170.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 332.40 ms. Allocated memory is still 188.7 MB. Free memory was 153.8 MB in the beginning and 170.3 MB in the end (delta: -16.4 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.38 ms. Allocated memory is still 188.7 MB. Free memory was 170.3 MB in the beginning and 168.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 482.47 ms. Allocated memory is still 188.7 MB. Free memory was 168.2 MB in the beginning and 145.5 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19154.12 ms. Allocated memory was 188.7 MB in the beginning and 471.9 MB in the end (delta: 283.1 MB). Free memory was 145.1 MB in the beginning and 312.6 MB in the end (delta: -167.5 MB). Peak memory consumption was 116.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 [L30] COND TRUE i < nodecount [L31] COND TRUE i == source [L32] distance[i] = 0 [L30] i++ [L30] COND TRUE i < nodecount [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY [L30] i++ [L30] COND FALSE !(i < nodecount) [L39] i = 0 [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND FALSE !(i < nodecount) [L51] i = 0 [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ [L51] COND FALSE !(i < edgecount) [L61] i = 0 [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND FALSE !(!(cond)) [L63] RET __VERIFIER_assert(distance[i]>=0) [L61] i++ [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19090.5ms, OverallIterations: 26, TraceHistogramMax: 4, EmptinessCheckTime: 33.1ms, AutomataDifference: 10342.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1003 SDtfs, 2086 SDslu, 2981 SDs, 0 SdLazy, 6397 SolverSat, 921 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4330.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 430 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 7331.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=687occurred in iteration=23, InterpolantAutomatonStates: 279, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1287.3ms AutomataMinimizationTime, 25 MinimizatonAttempts, 2145 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...