/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:03:28,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:03:28,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:03:28,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:03:28,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:03:28,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:03:28,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:03:28,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:03:28,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:03:28,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:03:28,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:03:28,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:03:28,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:03:28,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:03:28,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:03:28,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:03:28,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:03:28,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:03:28,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:03:28,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:03:28,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:03:28,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:03:28,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:03:28,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:03:28,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:03:28,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:03:28,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:03:28,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:03:28,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:03:28,639 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:03:28,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:03:28,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:03:28,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:03:28,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:03:28,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:03:28,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:03:28,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:03:28,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:03:28,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:03:28,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:03:28,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:03:28,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:03:28,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:03:28,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:03:28,648 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:03:28,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:03:28,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:03:28,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:03:28,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:03:28,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:03:28,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:03:28,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:03:29,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:03:29,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:03:29,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:03:29,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:03:29,094 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:03:29,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-02-23 19:03:29,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25c385734/1141ce419d99442aa625c05b825cff76/FLAGd43a85215 [2021-02-23 19:03:29,742 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:03:29,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-02-23 19:03:29,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25c385734/1141ce419d99442aa625c05b825cff76/FLAGd43a85215 [2021-02-23 19:03:30,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25c385734/1141ce419d99442aa625c05b825cff76 [2021-02-23 19:03:30,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:03:30,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:03:30,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:30,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:03:30,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:03:30,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71189e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30, skipping insertion in model container [2021-02-23 19:03:30,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:03:30,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:03:30,327 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c[403,416] [2021-02-23 19:03:30,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:30,357 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:03:30,372 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c[403,416] [2021-02-23 19:03:30,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:03:30,396 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:03:30,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30 WrapperNode [2021-02-23 19:03:30,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:03:30,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:03:30,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:03:30,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:03:30,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (1/1) ... [2021-02-23 19:03:30,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:03:30,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:03:30,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:03:30,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:03:30,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (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 [2021-02-23 19:03:30,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:03:30,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:03:30,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:03:30,565 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:03:30,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:03:30,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:03:30,566 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:03:30,566 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:03:30,566 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:03:30,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:03:30,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:03:30,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:03:30,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 19:03:30,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:03:30,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:03:30,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:03:30,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:03:30,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:03:30,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:03:30,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:03:31,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:03:31,003 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:03:31,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:31 BoogieIcfgContainer [2021-02-23 19:03:31,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:03:31,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:03:31,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:03:31,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:03:31,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:03:30" (1/3) ... [2021-02-23 19:03:31,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853b79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:31, skipping insertion in model container [2021-02-23 19:03:31,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:03:30" (2/3) ... [2021-02-23 19:03:31,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853b79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:03:31, skipping insertion in model container [2021-02-23 19:03:31,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:03:31" (3/3) ... [2021-02-23 19:03:31,019 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.c [2021-02-23 19:03:31,026 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:03:31,031 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:03:31,051 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:03:31,076 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:03:31,076 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:03:31,076 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:03:31,076 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:03:31,076 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:03:31,076 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:03:31,076 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:03:31,077 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:03:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-02-23 19:03:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 19:03:31,102 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:31,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:31,104 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2008420778, now seen corresponding path program 1 times [2021-02-23 19:03:31,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:31,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859446083] [2021-02-23 19:03:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:31,200 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:31,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:31,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:31,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:31,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:31,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859446083] [2021-02-23 19:03:31,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:31,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 19:03:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471574834] [2021-02-23 19:03:31,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 19:03:31,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:31,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 19:03:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:03:31,471 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2021-02-23 19:03:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:31,580 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-02-23 19:03:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 19:03:31,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-02-23 19:03:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:31,593 INFO L225 Difference]: With dead ends: 57 [2021-02-23 19:03:31,593 INFO L226 Difference]: Without dead ends: 36 [2021-02-23 19:03:31,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:03:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-23 19:03:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-02-23 19:03:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-23 19:03:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-02-23 19:03:31,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2021-02-23 19:03:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:31,656 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-02-23 19:03:31,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 19:03:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-02-23 19:03:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 19:03:31,657 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:31,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:31,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:03:31,658 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:31,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2031508803, now seen corresponding path program 1 times [2021-02-23 19:03:31,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:31,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023895505] [2021-02-23 19:03:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:31,666 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:31,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:31,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:31,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:31,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:31,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:31,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:31,928 WARN L141 QuantifierPusher]: treesize reduction 24, result has 70.7 percent of original size [2021-02-23 19:03:31,932 WARN L147 QuantifierPusher]: treesize reduction 24, result has 70.7 percent of original size 58 [2021-02-23 19:03:31,961 WARN L141 QuantifierPusher]: treesize reduction 25, result has 80.8 percent of original size [2021-02-23 19:03:31,965 WARN L147 QuantifierPusher]: treesize reduction 25, result has 80.8 percent of original size 105 [2021-02-23 19:03:31,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:31,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:32,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:32,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:32,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:32,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:32,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:32,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023895505] [2021-02-23 19:03:32,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:32,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:03:32,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413583289] [2021-02-23 19:03:32,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:03:32,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:03:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-23 19:03:32,154 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2021-02-23 19:03:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:32,806 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-02-23 19:03:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 19:03:32,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-02-23 19:03:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:32,812 INFO L225 Difference]: With dead ends: 87 [2021-02-23 19:03:32,812 INFO L226 Difference]: Without dead ends: 70 [2021-02-23 19:03:32,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-02-23 19:03:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-23 19:03:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2021-02-23 19:03:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 19:03:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-02-23 19:03:32,835 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 27 [2021-02-23 19:03:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:32,836 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-02-23 19:03:32,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:03:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-02-23 19:03:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 19:03:32,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:32,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:32,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:03:32,840 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:32,841 INFO L82 PathProgramCache]: Analyzing trace with hash -281319703, now seen corresponding path program 1 times [2021-02-23 19:03:32,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:32,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858032127] [2021-02-23 19:03:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:33,682 WARN L202 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:33,706 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:33,708 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:33,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:33,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:33,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:33,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:33,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:33,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:33,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:03:33,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:33,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 19:03:34,034 WARN L141 QuantifierPusher]: treesize reduction 26, result has 83.5 percent of original size [2021-02-23 19:03:34,042 WARN L147 QuantifierPusher]: treesize reduction 26, result has 83.5 percent of original size 132 [2021-02-23 19:03:34,167 WARN L141 QuantifierPusher]: treesize reduction 26, result has 83.9 percent of original size [2021-02-23 19:03:34,171 WARN L147 QuantifierPusher]: treesize reduction 26, result has 83.9 percent of original size 135 [2021-02-23 19:03:34,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:34,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:34,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:34,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:34,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:34,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:34,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858032127] [2021-02-23 19:03:34,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:34,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 19:03:34,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954259899] [2021-02-23 19:03:34,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 19:03:34,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 19:03:34,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-23 19:03:34,347 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 14 states. [2021-02-23 19:03:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:35,132 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-02-23 19:03:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 19:03:35,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2021-02-23 19:03:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:35,134 INFO L225 Difference]: With dead ends: 83 [2021-02-23 19:03:35,134 INFO L226 Difference]: Without dead ends: 78 [2021-02-23 19:03:35,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-02-23 19:03:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-23 19:03:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2021-02-23 19:03:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-23 19:03:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-02-23 19:03:35,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 31 [2021-02-23 19:03:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:35,153 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-02-23 19:03:35,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 19:03:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-02-23 19:03:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 19:03:35,155 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:35,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:35,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:03:35,155 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1820904171, now seen corresponding path program 2 times [2021-02-23 19:03:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:35,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324714978] [2021-02-23 19:03:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:35,747 WARN L202 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:36,410 WARN L202 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:36,415 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:36,417 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:36,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:36,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:36,464 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:03:36,465 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:03:36,483 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:03:36,484 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:03:36,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:36,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:36,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:36,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:36,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324714978] [2021-02-23 19:03:36,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:36,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:36,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635944224] [2021-02-23 19:03:36,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:36,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:36,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:36,528 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2021-02-23 19:03:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:36,727 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-02-23 19:03:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:36,728 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-23 19:03:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:36,729 INFO L225 Difference]: With dead ends: 62 [2021-02-23 19:03:36,729 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 19:03:36,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 19:03:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-02-23 19:03:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-23 19:03:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-02-23 19:03:36,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2021-02-23 19:03:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:36,748 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-02-23 19:03:36,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-02-23 19:03:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 19:03:36,750 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:36,750 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:36,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:03:36,750 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2113659377, now seen corresponding path program 1 times [2021-02-23 19:03:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:36,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259463144] [2021-02-23 19:03:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:37,395 WARN L202 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:38,243 WARN L202 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-23 19:03:38,881 WARN L202 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:38,888 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:38,889 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:39,007 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 19:03:39,008 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 19:03:39,027 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-23 19:03:39,029 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-23 19:03:39,050 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-23 19:03:39,051 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-23 19:03:39,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 19:03:39,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-02-23 19:03:39,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-23 19:03:39,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:39,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:39,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:39,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:39,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259463144] [2021-02-23 19:03:39,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:39,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:03:39,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882210471] [2021-02-23 19:03:39,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:03:39,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:39,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:03:39,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:03:39,261 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2021-02-23 19:03:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:39,828 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-02-23 19:03:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 19:03:39,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-23 19:03:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:39,830 INFO L225 Difference]: With dead ends: 62 [2021-02-23 19:03:39,830 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 19:03:39,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-23 19:03:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 19:03:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-02-23 19:03:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-23 19:03:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-02-23 19:03:39,847 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2021-02-23 19:03:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:39,848 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-02-23 19:03:39,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:03:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-02-23 19:03:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 19:03:39,849 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:39,849 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:39,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:03:39,850 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash -137859973, now seen corresponding path program 1 times [2021-02-23 19:03:39,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:39,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877019418] [2021-02-23 19:03:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:40,476 WARN L202 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:43,628 WARN L202 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 2940 DAG size of output: 96 [2021-02-23 19:03:44,294 WARN L202 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:44,297 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:44,299 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:44,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:44,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:03:44,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:03:44,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:03:44,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:03:44,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:03:44,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 19:03:44,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 19:03:44,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:03:44,626 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size [2021-02-23 19:03:44,631 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size 158 [2021-02-23 19:03:44,756 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-02-23 19:03:44,766 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-23 19:03:44,772 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 162 [2021-02-23 19:03:44,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:44,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:03:44,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:44,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:44,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:44,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877019418] [2021-02-23 19:03:44,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:44,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 19:03:44,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565151321] [2021-02-23 19:03:44,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 19:03:44,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 19:03:44,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-02-23 19:03:44,956 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 16 states. [2021-02-23 19:03:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:45,913 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-02-23 19:03:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 19:03:45,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2021-02-23 19:03:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:45,917 INFO L225 Difference]: With dead ends: 80 [2021-02-23 19:03:45,918 INFO L226 Difference]: Without dead ends: 75 [2021-02-23 19:03:45,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-02-23 19:03:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-23 19:03:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2021-02-23 19:03:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 19:03:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-02-23 19:03:45,957 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2021-02-23 19:03:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:45,957 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-02-23 19:03:45,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 19:03:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-02-23 19:03:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 19:03:45,969 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:45,970 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:45,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:03:45,970 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash 561132571, now seen corresponding path program 1 times [2021-02-23 19:03:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:45,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114505364] [2021-02-23 19:03:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:03:46,627 WARN L202 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:49,146 WARN L202 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 923 DAG size of output: 99 [2021-02-23 19:03:49,800 WARN L202 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:03:49,803 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:03:49,804 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:03:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:49,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:03:49,836 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:03:49,837 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:03:49,855 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:03:49,856 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:03:49,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:03:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:03:49,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:03:49,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:03:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:03:49,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114505364] [2021-02-23 19:03:49,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:03:49,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:03:49,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538114944] [2021-02-23 19:03:49,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:03:49,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:03:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:03:49,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:03:49,894 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2021-02-23 19:03:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:03:50,073 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-02-23 19:03:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:03:50,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2021-02-23 19:03:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:03:50,074 INFO L225 Difference]: With dead ends: 61 [2021-02-23 19:03:50,074 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 19:03:50,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:03:50,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 19:03:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-23 19:03:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 19:03:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-02-23 19:03:50,104 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2021-02-23 19:03:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:03:50,104 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-02-23 19:03:50,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:03:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-02-23 19:03:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 19:03:50,105 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:03:50,106 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:03:50,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:03:50,106 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:03:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:03:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash -603774553, now seen corresponding path program 2 times [2021-02-23 19:03:50,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:03:50,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130994474] [2021-02-23 19:03:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:16,852 WARN L202 SmtUtils]: Spent 26.68 s on a formula simplification. DAG size of input: 9660 DAG size of output: 133 [2021-02-23 19:04:17,549 WARN L202 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:18,474 WARN L202 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-23 19:04:19,195 WARN L202 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:19,198 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:19,200 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:19,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:19,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:19,249 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:04:19,249 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:04:19,272 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:19,274 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:19,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:19,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:19,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:19,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130994474] [2021-02-23 19:04:19,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:19,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:04:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638921482] [2021-02-23 19:04:19,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:04:19,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:19,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:04:19,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:04:19,334 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 6 states. [2021-02-23 19:04:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:19,607 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-02-23 19:04:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 19:04:19,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2021-02-23 19:04:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:19,609 INFO L225 Difference]: With dead ends: 68 [2021-02-23 19:04:19,609 INFO L226 Difference]: Without dead ends: 54 [2021-02-23 19:04:19,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:04:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-23 19:04:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-02-23 19:04:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-23 19:04:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-02-23 19:04:19,629 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-02-23 19:04:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:19,630 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-02-23 19:04:19,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:04:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-02-23 19:04:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-23 19:04:19,631 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:19,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:19,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:04:19,631 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1189971871, now seen corresponding path program 1 times [2021-02-23 19:04:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:19,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862303324] [2021-02-23 19:04:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:21,525 WARN L202 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 190 DAG size of output: 112 [2021-02-23 19:04:22,247 WARN L202 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:25,669 WARN L202 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 2940 DAG size of output: 96 [2021-02-23 19:04:28,930 WARN L202 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 2921 DAG size of output: 93 [2021-02-23 19:04:29,636 WARN L202 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:29,638 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:29,639 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:29,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:29,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:29,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:29,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:29,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:29,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:29,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:29,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 19:04:29,721 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-23 19:04:29,722 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-23 19:04:29,810 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.5 percent of original size [2021-02-23 19:04:29,811 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.5 percent of original size 130 [2021-02-23 19:04:29,911 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-23 19:04:29,913 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 137 [2021-02-23 19:04:30,068 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-02-23 19:04:30,071 WARN L141 QuantifierPusher]: treesize reduction 43, result has 74.6 percent of original size [2021-02-23 19:04:30,073 WARN L147 QuantifierPusher]: treesize reduction 43, result has 74.6 percent of original size 126 [2021-02-23 19:04:30,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:30,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:30,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:30,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:30,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862303324] [2021-02-23 19:04:30,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:30,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 19:04:30,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981444866] [2021-02-23 19:04:30,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 19:04:30,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:30,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 19:04:30,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-23 19:04:30,139 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 8 states. [2021-02-23 19:04:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:30,653 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-02-23 19:04:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:04:30,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2021-02-23 19:04:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:30,655 INFO L225 Difference]: With dead ends: 66 [2021-02-23 19:04:30,655 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 19:04:30,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-23 19:04:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 19:04:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 19:04:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 19:04:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-02-23 19:04:30,679 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 42 [2021-02-23 19:04:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:30,680 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-02-23 19:04:30,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 19:04:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-02-23 19:04:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 19:04:30,680 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:30,681 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:30,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:04:30,681 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1991590957, now seen corresponding path program 1 times [2021-02-23 19:04:30,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:30,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848667939] [2021-02-23 19:04:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:32,317 WARN L202 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 190 DAG size of output: 126 [2021-02-23 19:04:33,036 WARN L202 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:34,026 WARN L202 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-23 19:04:35,128 WARN L202 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-02-23 19:04:35,851 WARN L202 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:35,853 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:35,855 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:35,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:35,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:35,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:35,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:35,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:35,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:35,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:35,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:04:35,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:35,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:35,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:35,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:04:36,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:04:36,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:04:36,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 19:04:36,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 19:04:36,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-23 19:04:36,125 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-23 19:04:36,128 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 151 [2021-02-23 19:04:36,230 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-23 19:04:36,233 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 161 [2021-02-23 19:04:36,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:36,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:36,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:36,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:36,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:36,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:36,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848667939] [2021-02-23 19:04:36,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:36,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 19:04:36,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016750663] [2021-02-23 19:04:36,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 19:04:36,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 19:04:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-23 19:04:36,364 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2021-02-23 19:04:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:37,412 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-02-23 19:04:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 19:04:37,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2021-02-23 19:04:37,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:37,414 INFO L225 Difference]: With dead ends: 75 [2021-02-23 19:04:37,414 INFO L226 Difference]: Without dead ends: 70 [2021-02-23 19:04:37,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-02-23 19:04:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-23 19:04:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-02-23 19:04:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 19:04:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-02-23 19:04:37,437 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2021-02-23 19:04:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:37,437 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-02-23 19:04:37,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 19:04:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-02-23 19:04:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-23 19:04:37,438 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:37,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:37,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 19:04:37,439 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:37,439 INFO L82 PathProgramCache]: Analyzing trace with hash -461844391, now seen corresponding path program 2 times [2021-02-23 19:04:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:37,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709877519] [2021-02-23 19:04:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:45,781 WARN L202 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 3270 DAG size of output: 112 [2021-02-23 19:04:46,532 WARN L202 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:47,885 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 189 DAG size of output: 100 [2021-02-23 19:04:48,928 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-23 19:04:50,085 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-02-23 19:04:50,821 WARN L202 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:04:53,124 WARN L202 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 190 DAG size of output: 117 [2021-02-23 19:04:53,127 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:04:53,129 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:53,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:53,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:53,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:53,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:53,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:53,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:53,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:53,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:04:53,189 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:04:53,190 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:04:53,221 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:04:53,222 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:04:53,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:53,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:53,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:53,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:53,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:53,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709877519] [2021-02-23 19:04:53,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:53,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 19:04:53,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121401629] [2021-02-23 19:04:53,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 19:04:53,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 19:04:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:04:53,285 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 7 states. [2021-02-23 19:04:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:53,674 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-02-23 19:04:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 19:04:53,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2021-02-23 19:04:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:53,676 INFO L225 Difference]: With dead ends: 71 [2021-02-23 19:04:53,676 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 19:04:53,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:04:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 19:04:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-02-23 19:04:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-23 19:04:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-02-23 19:04:53,699 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2021-02-23 19:04:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:53,699 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-02-23 19:04:53,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 19:04:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-02-23 19:04:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 19:04:53,700 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:53,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:04:53,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 19:04:53,701 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1294839597, now seen corresponding path program 1 times [2021-02-23 19:04:53,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:53,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359767198] [2021-02-23 19:04:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:54,904 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-02-23 19:04:57,359 WARN L202 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 190 DAG size of output: 126 [2021-02-23 19:04:58,128 WARN L202 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:05:07,139 WARN L202 SmtUtils]: Spent 8.99 s on a formula simplification. DAG size of input: 3269 DAG size of output: 101 [2021-02-23 19:05:10,987 WARN L202 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 2940 DAG size of output: 96 [2021-02-23 19:05:12,266 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-02-23 19:05:13,359 WARN L202 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-23 19:05:14,193 WARN L202 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:05:14,195 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:05:14,196 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:05:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:14,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:14,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:05:14,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:05:14,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:05:14,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:05:14,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:05:14,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:05:14,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 19:05:14,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 19:05:14,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 19:05:14,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 19:05:14,537 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-23 19:05:14,539 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 37 [2021-02-23 19:05:14,595 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size [2021-02-23 19:05:14,596 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size 40 [2021-02-23 19:05:14,639 WARN L141 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size [2021-02-23 19:05:14,640 WARN L147 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size 44 [2021-02-23 19:05:14,679 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-23 19:05:14,681 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 160 [2021-02-23 19:05:14,809 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-23 19:05:14,810 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 164 [2021-02-23 19:05:14,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:14,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:05:14,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:14,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:15,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:05:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:05:15,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:05:15,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:05:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:05:15,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359767198] [2021-02-23 19:05:15,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:05:15,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 19:05:15,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619240595] [2021-02-23 19:05:15,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 19:05:15,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:05:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 19:05:15,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:05:15,028 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 20 states. [2021-02-23 19:05:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:05:16,592 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-02-23 19:05:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 19:05:16,593 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2021-02-23 19:05:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:05:16,594 INFO L225 Difference]: With dead ends: 70 [2021-02-23 19:05:16,594 INFO L226 Difference]: Without dead ends: 65 [2021-02-23 19:05:16,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 19:05:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-23 19:05:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-02-23 19:05:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-23 19:05:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-02-23 19:05:16,619 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 48 [2021-02-23 19:05:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:05:16,619 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-02-23 19:05:16,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 19:05:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-02-23 19:05:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 19:05:16,620 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:05:16,620 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:05:16,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 19:05:16,621 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:05:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:05:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1564230823, now seen corresponding path program 2 times [2021-02-23 19:05:16,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:05:16,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147938354] [2021-02-23 19:05:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:05:20,636 WARN L202 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 2941 DAG size of output: 101 [2021-02-23 19:05:26,458 WARN L202 SmtUtils]: Spent 5.81 s on a formula simplification. DAG size of input: 1254 DAG size of output: 126 [2021-02-23 19:05:27,321 WARN L202 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:05:54,407 WARN L202 SmtUtils]: Spent 27.04 s on a formula simplification. DAG size of input: 9504 DAG size of output: 123 [2021-02-23 19:05:56,655 WARN L202 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 183 DAG size of output: 132 [2021-02-23 19:05:57,994 WARN L202 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-23 19:06:01,752 WARN L202 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 923 DAG size of output: 99 [2021-02-23 19:06:03,991 WARN L202 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 905 DAG size of output: 93 [2021-02-23 19:06:05,097 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:06:50,987 WARN L202 SmtUtils]: Spent 45.83 s on a formula simplification. DAG size of input: 10428 DAG size of output: 121 [2021-02-23 19:06:55,406 WARN L202 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 170 DAG size of output: 134 [2021-02-23 19:06:55,410 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:06:55,413 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:06:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:06:55,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:06:55,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:06:55,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:06:55,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:06:55,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:06:55,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 19:06:55,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 19:06:55,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-02-23 19:06:55,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 19:06:55,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:55,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 19:06:56,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:56,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 19:06:56,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:56,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:06:56,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:56,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 19:06:56,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:56,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:06:56,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:56,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 19:06:56,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:56,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:06:56,597 WARN L141 QuantifierPusher]: treesize reduction 26, result has 85.4 percent of original size [2021-02-23 19:06:56,602 WARN L147 QuantifierPusher]: treesize reduction 26, result has 85.4 percent of original size 152 [2021-02-23 19:06:56,849 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-02-23 19:06:56,859 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size [2021-02-23 19:06:56,862 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size 142 [2021-02-23 19:06:57,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:57,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:06:57,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:57,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:06:57,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:57,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:06:57,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:06:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:06:57,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:06:57,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:06:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:06:57,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147938354] [2021-02-23 19:06:57,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:06:57,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 19:06:57,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985228190] [2021-02-23 19:06:57,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 19:06:57,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:06:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 19:06:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-02-23 19:06:57,352 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 22 states. [2021-02-23 19:06:58,625 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-02-23 19:07:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:07:01,309 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-02-23 19:07:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 19:07:01,311 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-02-23 19:07:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:07:01,313 INFO L225 Difference]: With dead ends: 79 [2021-02-23 19:07:01,313 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 19:07:01,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-02-23 19:07:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 19:07:01,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-02-23 19:07:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-23 19:07:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-02-23 19:07:01,352 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 52 [2021-02-23 19:07:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:07:01,352 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-02-23 19:07:01,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 19:07:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-02-23 19:07:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 19:07:01,354 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:07:01,354 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:07:01,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 19:07:01,355 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:07:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:07:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash -387985019, now seen corresponding path program 3 times [2021-02-23 19:07:01,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:07:01,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705697758] [2021-02-23 19:07:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:07:03,964 WARN L202 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-02-23 19:07:08,793 WARN L202 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 190 DAG size of output: 126 [2021-02-23 19:07:09,947 WARN L202 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:07:18,867 WARN L202 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 3269 DAG size of output: 116 [2021-02-23 19:08:24,738 WARN L202 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 10227 DAG size of output: 144 [2021-02-23 19:08:26,481 WARN L202 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-23 19:08:32,302 WARN L202 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 2939 DAG size of output: 99 [2021-02-23 19:08:35,091 WARN L202 SmtUtils]: Spent 2.78 s on a formula simplification. DAG size of input: 905 DAG size of output: 93 [2021-02-23 19:08:36,799 WARN L202 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:08:39,098 WARN L202 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 189 DAG size of output: 96 [2021-02-23 19:08:41,958 WARN L202 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 190 DAG size of output: 101 [2021-02-23 19:08:41,962 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:08:41,963 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:08:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:41,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:41,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:41,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:41,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:08:42,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:42,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:42,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:42,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:42,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:42,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:42,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:42,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:08:42,093 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-23 19:08:42,094 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-23 19:08:42,162 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-23 19:08:42,164 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-23 19:08:42,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:42,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:42,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:08:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:08:42,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:42,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:08:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:08:42,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705697758] [2021-02-23 19:08:42,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:08:42,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:08:42,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323554764] [2021-02-23 19:08:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:08:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:08:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:08:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:08:42,262 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 9 states. [2021-02-23 19:08:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:08:43,282 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-02-23 19:08:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 19:08:43,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2021-02-23 19:08:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:08:43,285 INFO L225 Difference]: With dead ends: 90 [2021-02-23 19:08:43,285 INFO L226 Difference]: Without dead ends: 69 [2021-02-23 19:08:43,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:08:43,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-23 19:08:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-02-23 19:08:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 19:08:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-02-23 19:08:43,313 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2021-02-23 19:08:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:08:43,313 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-02-23 19:08:43,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:08:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-02-23 19:08:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 19:08:43,314 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:08:43,314 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:08:43,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 19:08:43,314 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:08:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:08:43,315 INFO L82 PathProgramCache]: Analyzing trace with hash -710487167, now seen corresponding path program 4 times [2021-02-23 19:08:43,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:08:43,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958492651] [2021-02-23 19:08:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:08:43,431 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-23 19:08:43,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:43,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-23 19:08:43,542 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-23 19:08:49,424 WARN L202 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 2941 DAG size of output: 101 [2021-02-23 19:08:49,537 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-23 19:08:49,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:49,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:08:56,480 WARN L202 SmtUtils]: Spent 6.88 s on a formula simplification. DAG size of input: 1250 DAG size of output: 110 [2021-02-23 19:08:56,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:56,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 19:08:57,879 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-23 19:08:57,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:08:57,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 19:08:58,095 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-23 19:09:00,537 WARN L202 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 189 DAG size of output: 100 [2021-02-23 19:09:00,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:00,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 19:09:04,492 WARN L202 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 183 DAG size of output: 150 [2021-02-23 19:09:04,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:04,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-23 19:09:06,194 WARN L202 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-23 19:09:06,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:06,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 19:09:13,444 WARN L202 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 2939 DAG size of output: 99 [2021-02-23 19:09:13,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:13,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-23 19:09:13,640 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-02-23 19:09:15,417 WARN L202 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-23 19:09:15,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:09:15,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-23 19:09:16,789 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 81 DAG size of output: 81