/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-b7b32d2 [2021-02-21 21:32:48,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:32:48,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:32:48,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:32:48,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:32:48,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:32:48,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:32:48,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:32:48,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:32:48,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:32:48,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:32:48,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:32:48,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:32:48,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:32:48,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:32:48,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:32:48,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:32:48,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:32:48,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:32:48,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:32:48,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:32:48,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:32:48,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:32:48,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:32:48,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:32:48,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:32:48,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:32:48,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:32:48,420 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:32:48,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:32:48,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:32:48,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:32:48,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:32:48,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:32:48,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:32:48,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:32:48,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:32:48,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:32:48,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:32:48,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:32:48,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:32:48,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:32:48,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:32:48,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:32:48,451 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:32:48,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:32:48,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:32:48,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:32:48,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:32:48,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:32:48,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:32:48,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:32:48,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:32:48,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:32:48,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:32:48,976 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:32:48,977 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:32:48,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-02-21 21:32:49,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9254890/9efc4595592c4209a8fba53169477dbc/FLAGf67585766 [2021-02-21 21:32:49,770 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:32:49,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-02-21 21:32:49,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9254890/9efc4595592c4209a8fba53169477dbc/FLAGf67585766 [2021-02-21 21:32:50,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da9254890/9efc4595592c4209a8fba53169477dbc [2021-02-21 21:32:50,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:32:50,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:32:50,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:50,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:32:50,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:32:50,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442a2193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50, skipping insertion in model container [2021-02-21 21:32:50,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:32:50,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:32:50,325 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] [2021-02-21 21:32:50,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:50,353 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:32:50,368 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] [2021-02-21 21:32:50,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:32:50,394 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:32:50,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50 WrapperNode [2021-02-21 21:32:50,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:32:50,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:32:50,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:32:50,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:32:50,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (1/1) ... [2021-02-21 21:32:50,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:32:50,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:32:50,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:32:50,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:32:50,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (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 [2021-02-21 21:32:50,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:32:50,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:32:50,571 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:32:50,571 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:32:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:32:50,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:32:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:32:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:32:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:32:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:32:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:32:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:32:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:32:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:32:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:32:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:32:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:32:50,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:32:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:32:50,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:32:50,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:32:50,971 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:32:50,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:50 BoogieIcfgContainer [2021-02-21 21:32:50,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:32:50,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:32:50,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:32:50,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:32:50,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:32:50" (1/3) ... [2021-02-21 21:32:50,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7621e098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:50, skipping insertion in model container [2021-02-21 21:32:50,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:32:50" (2/3) ... [2021-02-21 21:32:50,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7621e098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:32:50, skipping insertion in model container [2021-02-21 21:32:50,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:32:50" (3/3) ... [2021-02-21 21:32:50,985 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.c [2021-02-21 21:32:50,994 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:32:50,999 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:32:51,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:32:51,051 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:32:51,051 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:32:51,051 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:32:51,051 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:32:51,052 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:32:51,052 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:32:51,052 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:32:51,052 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:32:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-02-21 21:32:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 21:32:51,084 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:51,084 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] [2021-02-21 21:32:51,085 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2008420778, now seen corresponding path program 1 times [2021-02-21 21:32:51,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:51,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966724370] [2021-02-21 21:32:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:51,250 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:51,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:51,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:51,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:51,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:51,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:51,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:51,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:32:51,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966724370] [2021-02-21 21:32:51,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:51,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:32:51,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227639135] [2021-02-21 21:32:51,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:32:51,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:32:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:32:51,695 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2021-02-21 21:32:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:51,846 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-02-21 21:32:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:32:51,849 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-02-21 21:32:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:51,859 INFO L225 Difference]: With dead ends: 57 [2021-02-21 21:32:51,859 INFO L226 Difference]: Without dead ends: 36 [2021-02-21 21:32:51,863 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 [2021-02-21 21:32:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-21 21:32:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-02-21 21:32:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-21 21:32:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-02-21 21:32:51,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2021-02-21 21:32:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:51,918 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-02-21 21:32:51,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:32:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-02-21 21:32:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 21:32:51,919 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:51,920 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] [2021-02-21 21:32:51,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:32:51,920 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2031508803, now seen corresponding path program 1 times [2021-02-21 21:32:51,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:51,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048737089] [2021-02-21 21:32:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:51,925 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:52,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:52,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:52,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:52,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:52,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:52,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:32:52,187 WARN L141 QuantifierPusher]: treesize reduction 24, result has 70.7 percent of original size [2021-02-21 21:32:52,191 WARN L147 QuantifierPusher]: treesize reduction 24, result has 70.7 percent of original size 58 [2021-02-21 21:32:52,231 WARN L141 QuantifierPusher]: treesize reduction 25, result has 80.8 percent of original size [2021-02-21 21:32:52,234 WARN L147 QuantifierPusher]: treesize reduction 25, result has 80.8 percent of original size 105 [2021-02-21 21:32:52,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:52,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:52,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:52,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:52,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:52,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:32:52,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048737089] [2021-02-21 21:32:52,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:52,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 21:32:52,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708128077] [2021-02-21 21:32:52,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 21:32:52,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 21:32:52,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-21 21:32:52,346 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2021-02-21 21:32:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:52,926 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-02-21 21:32:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 21:32:52,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-02-21 21:32:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:52,930 INFO L225 Difference]: With dead ends: 87 [2021-02-21 21:32:52,930 INFO L226 Difference]: Without dead ends: 70 [2021-02-21 21:32:52,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:32:52,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-21 21:32:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2021-02-21 21:32:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 21:32:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-02-21 21:32:52,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 27 [2021-02-21 21:32:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:52,949 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-02-21 21:32:52,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 21:32:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-02-21 21:32:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:32:52,950 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:52,950 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] [2021-02-21 21:32:52,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:32:52,951 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:52,951 INFO L82 PathProgramCache]: Analyzing trace with hash -281319703, now seen corresponding path program 1 times [2021-02-21 21:32:52,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:52,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233163239] [2021-02-21 21:32:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:53,542 WARN L202 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:32:53,558 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:32:53,560 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:53,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:53,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:53,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:53,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:32:53,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:32:53,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:32:53,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:32:53,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-21 21:32:53,781 WARN L141 QuantifierPusher]: treesize reduction 26, result has 83.5 percent of original size [2021-02-21 21:32:53,784 WARN L147 QuantifierPusher]: treesize reduction 26, result has 83.5 percent of original size 132 [2021-02-21 21:32:53,888 WARN L141 QuantifierPusher]: treesize reduction 26, result has 83.9 percent of original size [2021-02-21 21:32:53,891 WARN L147 QuantifierPusher]: treesize reduction 26, result has 83.9 percent of original size 135 [2021-02-21 21:32:53,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:53,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:32:53,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:53,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:54,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:54,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:54,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:32:54,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233163239] [2021-02-21 21:32:54,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:54,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:32:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164215013] [2021-02-21 21:32:54,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:32:54,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:32:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:32:54,047 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 14 states. [2021-02-21 21:32:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:54,802 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-02-21 21:32:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:32:54,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2021-02-21 21:32:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:54,804 INFO L225 Difference]: With dead ends: 83 [2021-02-21 21:32:54,805 INFO L226 Difference]: Without dead ends: 78 [2021-02-21 21:32:54,806 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 [2021-02-21 21:32:54,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-21 21:32:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2021-02-21 21:32:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-21 21:32:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-02-21 21:32:54,824 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 31 [2021-02-21 21:32:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:54,824 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-02-21 21:32:54,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:32:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-02-21 21:32:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 21:32:54,826 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:54,826 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] [2021-02-21 21:32:54,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:32:54,826 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1820904171, now seen corresponding path program 2 times [2021-02-21 21:32:54,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:54,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018906345] [2021-02-21 21:32:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:55,464 WARN L202 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:32:56,116 WARN L202 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:32:56,119 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:32:56,123 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:56,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:56,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:56,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:56,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:32:56,193 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:32:56,195 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:32:56,214 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:32:56,215 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:32:56,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:56,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:56,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:56,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:32:56,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018906345] [2021-02-21 21:32:56,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:56,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:32:56,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725596181] [2021-02-21 21:32:56,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:32:56,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:32:56,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:32:56,286 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2021-02-21 21:32:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:56,488 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-02-21 21:32:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:32:56,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-21 21:32:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:56,490 INFO L225 Difference]: With dead ends: 62 [2021-02-21 21:32:56,490 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 21:32:56,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:32:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 21:32:56,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-02-21 21:32:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-21 21:32:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-02-21 21:32:56,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2021-02-21 21:32:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:56,507 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-02-21 21:32:56,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:32:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-02-21 21:32:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:32:56,508 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:56,508 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] [2021-02-21 21:32:56,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:32:56,509 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:56,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:56,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2113659377, now seen corresponding path program 1 times [2021-02-21 21:32:56,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:56,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383167622] [2021-02-21 21:32:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:32:57,162 WARN L202 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:32:57,959 WARN L202 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-21 21:32:58,598 WARN L202 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:32:58,601 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:32:58,603 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:32:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:58,722 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-21 21:32:58,723 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-21 21:32:58,751 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:32:58,752 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:32:58,778 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-21 21:32:58,779 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-21 21:32:58,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:58,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 21:32:58,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:58,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-02-21 21:32:58,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:58,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-21 21:32:58,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:58,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:58,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:32:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:32:58,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:58,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:32:58,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:32:58,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:32:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:32:58,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383167622] [2021-02-21 21:32:58,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:32:58,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:32:58,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983528006] [2021-02-21 21:32:58,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:32:58,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:32:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:32:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:32:58,979 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2021-02-21 21:32:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:32:59,569 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-02-21 21:32:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:32:59,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-21 21:32:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:32:59,571 INFO L225 Difference]: With dead ends: 62 [2021-02-21 21:32:59,571 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 21:32:59,572 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 [2021-02-21 21:32:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 21:32:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-02-21 21:32:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 21:32:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-02-21 21:32:59,591 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2021-02-21 21:32:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:32:59,591 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-02-21 21:32:59,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:32:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-02-21 21:32:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 21:32:59,593 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:32:59,593 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] [2021-02-21 21:32:59,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:32:59,593 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:32:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:32:59,594 INFO L82 PathProgramCache]: Analyzing trace with hash -137859973, now seen corresponding path program 1 times [2021-02-21 21:32:59,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:32:59,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100668488] [2021-02-21 21:32:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:00,200 WARN L202 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:03,275 WARN L202 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 2940 DAG size of output: 96 [2021-02-21 21:33:03,923 WARN L202 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:03,926 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:03,927 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:04,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:04,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:04,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:04,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:04,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:04,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:04,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:33:04,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-21 21:33:04,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-21 21:33:04,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:33:04,165 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size [2021-02-21 21:33:04,169 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size 158 [2021-02-21 21:33:04,298 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-21 21:33:04,302 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 162 [2021-02-21 21:33:04,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:04,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:04,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:04,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:04,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:04,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:04,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100668488] [2021-02-21 21:33:04,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:04,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:33:04,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267209979] [2021-02-21 21:33:04,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:33:04,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:33:04,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:33:04,461 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 16 states. [2021-02-21 21:33:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:05,428 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-02-21 21:33:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:33:05,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2021-02-21 21:33:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:05,430 INFO L225 Difference]: With dead ends: 80 [2021-02-21 21:33:05,430 INFO L226 Difference]: Without dead ends: 75 [2021-02-21 21:33:05,431 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 [2021-02-21 21:33:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-21 21:33:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2021-02-21 21:33:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-21 21:33:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-02-21 21:33:05,453 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2021-02-21 21:33:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:05,454 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-02-21 21:33:05,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:33:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-02-21 21:33:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-21 21:33:05,455 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:05,456 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] [2021-02-21 21:33:05,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:33:05,456 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash 561132571, now seen corresponding path program 1 times [2021-02-21 21:33:05,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:05,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800581675] [2021-02-21 21:33:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:06,035 WARN L202 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:08,436 WARN L202 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 923 DAG size of output: 99 [2021-02-21 21:33:09,058 WARN L202 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:09,061 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:09,062 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:09,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:09,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:09,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:09,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:09,104 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:09,105 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:09,122 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:09,122 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:09,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:09,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:09,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:09,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:09,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800581675] [2021-02-21 21:33:09,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:09,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:33:09,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464027604] [2021-02-21 21:33:09,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:33:09,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:33:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:33:09,162 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2021-02-21 21:33:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:09,367 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-02-21 21:33:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:33:09,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2021-02-21 21:33:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:09,369 INFO L225 Difference]: With dead ends: 61 [2021-02-21 21:33:09,369 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 21:33:09,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:33:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 21:33:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-21 21:33:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-21 21:33:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-02-21 21:33:09,390 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2021-02-21 21:33:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:09,390 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-02-21 21:33:09,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:33:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-02-21 21:33:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 21:33:09,391 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:09,392 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] [2021-02-21 21:33:09,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:33:09,392 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash -603774553, now seen corresponding path program 2 times [2021-02-21 21:33:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:09,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103201746] [2021-02-21 21:33:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:35,631 WARN L202 SmtUtils]: Spent 26.16 s on a formula simplification. DAG size of input: 9660 DAG size of output: 133 [2021-02-21 21:33:36,330 WARN L202 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:37,255 WARN L202 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-21 21:33:37,913 WARN L202 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:37,916 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:37,918 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:37,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:37,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:37,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:37,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:37,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:37,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:37,971 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:33:37,972 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:33:37,992 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:33:37,993 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:33:37,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:37,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:38,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:38,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:38,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:38,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103201746] [2021-02-21 21:33:38,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:38,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:33:38,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302346888] [2021-02-21 21:33:38,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:33:38,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:33:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:33:38,036 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 6 states. [2021-02-21 21:33:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:38,294 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-02-21 21:33:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:33:38,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2021-02-21 21:33:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:38,295 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:33:38,296 INFO L226 Difference]: Without dead ends: 54 [2021-02-21 21:33:38,296 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 [2021-02-21 21:33:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-21 21:33:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-02-21 21:33:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 21:33:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-02-21 21:33:38,324 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-02-21 21:33:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:38,325 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-02-21 21:33:38,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:33:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-02-21 21:33:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-21 21:33:38,326 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:38,326 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] [2021-02-21 21:33:38,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:33:38,327 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:38,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1189971871, now seen corresponding path program 1 times [2021-02-21 21:33:38,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:38,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505164848] [2021-02-21 21:33:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:40,122 WARN L202 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 190 DAG size of output: 112 [2021-02-21 21:33:40,803 WARN L202 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:44,012 WARN L202 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 2940 DAG size of output: 96 [2021-02-21 21:33:47,125 WARN L202 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 2921 DAG size of output: 93 [2021-02-21 21:33:47,782 WARN L202 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:47,784 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:47,786 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:47,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:47,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:47,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:47,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:47,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:47,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:47,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:47,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:33:47,892 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-21 21:33:47,893 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-21 21:33:47,988 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.5 percent of original size [2021-02-21 21:33:47,990 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.5 percent of original size 130 [2021-02-21 21:33:48,089 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-21 21:33:48,090 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 137 [2021-02-21 21:33:48,270 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-02-21 21:33:48,275 WARN L141 QuantifierPusher]: treesize reduction 43, result has 74.6 percent of original size [2021-02-21 21:33:48,277 WARN L147 QuantifierPusher]: treesize reduction 43, result has 74.6 percent of original size 126 [2021-02-21 21:33:48,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:48,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:48,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:48,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:48,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:48,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505164848] [2021-02-21 21:33:48,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:48,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 21:33:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010750118] [2021-02-21 21:33:48,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 21:33:48,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 21:33:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:33:48,348 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 8 states. [2021-02-21 21:33:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:48,853 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-02-21 21:33:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 21:33:48,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2021-02-21 21:33:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:48,855 INFO L225 Difference]: With dead ends: 66 [2021-02-21 21:33:48,855 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:33:48,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-21 21:33:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:33:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-21 21:33:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 21:33:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-02-21 21:33:48,877 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 42 [2021-02-21 21:33:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:48,877 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-02-21 21:33:48,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 21:33:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-02-21 21:33:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 21:33:48,878 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:48,878 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] [2021-02-21 21:33:48,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 21:33:48,879 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1991590957, now seen corresponding path program 1 times [2021-02-21 21:33:48,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:48,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359320511] [2021-02-21 21:33:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:33:50,454 WARN L202 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 190 DAG size of output: 126 [2021-02-21 21:33:51,131 WARN L202 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:52,083 WARN L202 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-21 21:33:53,207 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-02-21 21:33:53,905 WARN L202 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:33:53,907 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:33:53,908 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:33:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:53,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:53,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:53,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:53,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:33:53,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:53,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:33:54,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:33:54,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:33:54,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:54,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:33:54,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:33:54,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-21 21:33:54,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:33:54,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-21 21:33:54,164 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-21 21:33:54,172 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 151 [2021-02-21 21:33:54,271 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-21 21:33:54,274 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 161 [2021-02-21 21:33:54,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:54,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:33:54,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:54,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:33:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:33:54,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:33:54,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:33:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:33:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359320511] [2021-02-21 21:33:54,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:33:54,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 21:33:54,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996990904] [2021-02-21 21:33:54,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 21:33:54,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:33:54,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 21:33:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-21 21:33:54,404 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2021-02-21 21:33:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:33:55,492 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-02-21 21:33:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 21:33:55,493 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2021-02-21 21:33:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:33:55,494 INFO L225 Difference]: With dead ends: 75 [2021-02-21 21:33:55,494 INFO L226 Difference]: Without dead ends: 70 [2021-02-21 21:33:55,495 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 [2021-02-21 21:33:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-21 21:33:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-02-21 21:33:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 21:33:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-02-21 21:33:55,518 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2021-02-21 21:33:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:33:55,518 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-02-21 21:33:55,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 21:33:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-02-21 21:33:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 21:33:55,519 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:33:55,520 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] [2021-02-21 21:33:55,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 21:33:55,520 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:33:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:33:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash -461844391, now seen corresponding path program 2 times [2021-02-21 21:33:55,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:33:55,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845043574] [2021-02-21 21:33:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:03,575 WARN L202 SmtUtils]: Spent 8.03 s on a formula simplification. DAG size of input: 3270 DAG size of output: 112 [2021-02-21 21:34:04,380 WARN L202 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:34:05,709 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 189 DAG size of output: 100 [2021-02-21 21:34:06,751 WARN L202 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-21 21:34:07,884 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-02-21 21:34:08,588 WARN L202 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:34:10,828 WARN L202 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 190 DAG size of output: 117 [2021-02-21 21:34:10,830 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:10,832 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:10,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:10,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:10,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:10,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:10,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:10,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:34:10,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:10,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:34:10,948 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:34:10,949 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:34:10,972 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:34:10,973 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:34:10,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:10,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:11,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:11,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:11,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:34:11,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845043574] [2021-02-21 21:34:11,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:11,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 21:34:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205024264] [2021-02-21 21:34:11,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 21:34:11,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:11,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 21:34:11,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:34:11,021 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 7 states. [2021-02-21 21:34:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:11,378 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-02-21 21:34:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:34:11,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2021-02-21 21:34:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:11,380 INFO L225 Difference]: With dead ends: 71 [2021-02-21 21:34:11,380 INFO L226 Difference]: Without dead ends: 57 [2021-02-21 21:34:11,381 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 [2021-02-21 21:34:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-21 21:34:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-02-21 21:34:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 21:34:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-02-21 21:34:11,404 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2021-02-21 21:34:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:11,405 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-02-21 21:34:11,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 21:34:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-02-21 21:34:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 21:34:11,406 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:11,406 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] [2021-02-21 21:34:11,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 21:34:11,406 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:11,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:11,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1294839597, now seen corresponding path program 1 times [2021-02-21 21:34:11,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:11,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990097670] [2021-02-21 21:34:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:12,575 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-02-21 21:34:15,022 WARN L202 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 190 DAG size of output: 126 [2021-02-21 21:34:15,812 WARN L202 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:34:24,338 WARN L202 SmtUtils]: Spent 8.51 s on a formula simplification. DAG size of input: 3269 DAG size of output: 101 [2021-02-21 21:34:27,767 WARN L202 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 2940 DAG size of output: 96 [2021-02-21 21:34:28,990 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-02-21 21:34:30,006 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-21 21:34:30,762 WARN L202 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:34:30,764 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:34:30,766 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:34:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:30,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:30,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:34:30,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:34:30,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:34:30,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:34:30,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:34:30,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:34:30,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-21 21:34:30,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:30,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 21:34:31,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:34:31,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-21 21:34:31,095 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-21 21:34:31,097 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 37 [2021-02-21 21:34:31,156 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size [2021-02-21 21:34:31,158 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size 40 [2021-02-21 21:34:31,200 WARN L141 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size [2021-02-21 21:34:31,202 WARN L147 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size 44 [2021-02-21 21:34:31,237 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-21 21:34:31,239 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 160 [2021-02-21 21:34:31,354 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-21 21:34:31,356 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 164 [2021-02-21 21:34:31,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:34:31,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:34:31,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:34:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:34:31,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:34:31,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:34:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:34:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990097670] [2021-02-21 21:34:31,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:34:31,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-21 21:34:31,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664733538] [2021-02-21 21:34:31,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-21 21:34:31,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:34:31,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-21 21:34:31,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-21 21:34:31,575 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 20 states. [2021-02-21 21:34:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:34:33,045 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-02-21 21:34:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:34:33,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2021-02-21 21:34:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:34:33,047 INFO L225 Difference]: With dead ends: 70 [2021-02-21 21:34:33,047 INFO L226 Difference]: Without dead ends: 65 [2021-02-21 21:34:33,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-02-21 21:34:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-21 21:34:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-02-21 21:34:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-21 21:34:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-02-21 21:34:33,071 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 48 [2021-02-21 21:34:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:34:33,072 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-02-21 21:34:33,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-21 21:34:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-02-21 21:34:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-21 21:34:33,072 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:34:33,073 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] [2021-02-21 21:34:33,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 21:34:33,073 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:34:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:34:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1564230823, now seen corresponding path program 2 times [2021-02-21 21:34:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:34:33,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550514597] [2021-02-21 21:34:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:34:36,884 WARN L202 SmtUtils]: Spent 3.79 s on a formula simplification. DAG size of input: 2941 DAG size of output: 101 [2021-02-21 21:34:42,542 WARN L202 SmtUtils]: Spent 5.64 s on a formula simplification. DAG size of input: 1254 DAG size of output: 126 [2021-02-21 21:34:43,360 WARN L202 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:35:10,426 WARN L202 SmtUtils]: Spent 27.01 s on a formula simplification. DAG size of input: 9504 DAG size of output: 123 [2021-02-21 21:35:12,701 WARN L202 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 183 DAG size of output: 132 [2021-02-21 21:35:13,946 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-21 21:35:16,922 WARN L202 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 923 DAG size of output: 99 [2021-02-21 21:35:19,028 WARN L202 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 905 DAG size of output: 93 [2021-02-21 21:35:19,938 WARN L202 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:35:55,590 WARN L202 SmtUtils]: Spent 35.60 s on a formula simplification. DAG size of input: 10428 DAG size of output: 121 [2021-02-21 21:35:58,500 WARN L202 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 170 DAG size of output: 134 [2021-02-21 21:35:58,503 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:35:58,505 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:35:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:58,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:58,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:35:58,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:35:58,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 21:35:58,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:35:58,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:35:58,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-21 21:35:58,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-02-21 21:35:58,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-21 21:35:58,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-21 21:35:58,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 21:35:58,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:58,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:35:59,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 21:35:59,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:35:59,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-21 21:35:59,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:35:59,263 WARN L141 QuantifierPusher]: treesize reduction 26, result has 85.4 percent of original size [2021-02-21 21:35:59,267 WARN L147 QuantifierPusher]: treesize reduction 26, result has 85.4 percent of original size 152 [2021-02-21 21:35:59,415 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size [2021-02-21 21:35:59,417 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size 142 [2021-02-21 21:35:59,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:59,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:35:59,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:59,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:35:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:35:59,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:35:59,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:35:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:35:59,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550514597] [2021-02-21 21:35:59,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:35:59,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-21 21:35:59,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732131999] [2021-02-21 21:35:59,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-21 21:35:59,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:35:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-21 21:35:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-02-21 21:35:59,697 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 22 states. [2021-02-21 21:36:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:36:02,491 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-02-21 21:36:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-21 21:36:02,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-02-21 21:36:02,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:36:02,494 INFO L225 Difference]: With dead ends: 79 [2021-02-21 21:36:02,494 INFO L226 Difference]: Without dead ends: 74 [2021-02-21 21:36:02,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-02-21 21:36:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-21 21:36:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-02-21 21:36:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-21 21:36:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-02-21 21:36:02,524 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 52 [2021-02-21 21:36:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:36:02,525 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-02-21 21:36:02,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-21 21:36:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-02-21 21:36:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-21 21:36:02,526 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:36:02,526 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] [2021-02-21 21:36:02,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 21:36:02,526 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:36:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:36:02,527 INFO L82 PathProgramCache]: Analyzing trace with hash -387985019, now seen corresponding path program 3 times [2021-02-21 21:36:02,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:36:02,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307210409] [2021-02-21 21:36:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:36:04,280 WARN L202 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-02-21 21:36:07,723 WARN L202 SmtUtils]: Spent 3.43 s on a formula simplification. DAG size of input: 190 DAG size of output: 126 [2021-02-21 21:36:08,763 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:36:17,335 WARN L202 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 3269 DAG size of output: 116 [2021-02-21 21:37:08,801 WARN L202 SmtUtils]: Spent 51.42 s on a formula simplification. DAG size of input: 10227 DAG size of output: 144 [2021-02-21 21:37:10,483 WARN L202 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-21 21:37:16,495 WARN L202 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 2939 DAG size of output: 99 [2021-02-21 21:37:19,298 WARN L202 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 905 DAG size of output: 93 [2021-02-21 21:37:20,531 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:37:22,824 WARN L202 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 189 DAG size of output: 96 [2021-02-21 21:37:25,512 WARN L202 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 190 DAG size of output: 101 [2021-02-21 21:37:25,515 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:37:25,517 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:37:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:37:25,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:25,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:37:25,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:37:25,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:37:25,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:37:25,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:37:25,655 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-21 21:37:25,656 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-21 21:37:25,722 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-21 21:37:25,723 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-21 21:37:25,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:25,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:37:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:37:25,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:25,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:37:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:37:25,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307210409] [2021-02-21 21:37:25,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:37:25,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:37:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905342120] [2021-02-21 21:37:25,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:37:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:37:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:37:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:37:25,817 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 9 states. [2021-02-21 21:37:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:37:26,820 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-02-21 21:37:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 21:37:26,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2021-02-21 21:37:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:37:26,823 INFO L225 Difference]: With dead ends: 90 [2021-02-21 21:37:26,823 INFO L226 Difference]: Without dead ends: 69 [2021-02-21 21:37:26,824 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 [2021-02-21 21:37:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-21 21:37:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-02-21 21:37:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 21:37:26,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-02-21 21:37:26,848 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2021-02-21 21:37:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:37:26,848 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-02-21 21:37:26,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:37:26,849 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-02-21 21:37:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 21:37:26,849 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:37:26,850 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] [2021-02-21 21:37:26,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 21:37:26,850 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:37:26,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:37:26,851 INFO L82 PathProgramCache]: Analyzing trace with hash -710487167, now seen corresponding path program 4 times [2021-02-21 21:37:26,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:37:26,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64177750] [2021-02-21 21:37:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:37:26,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:26,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-21 21:37:33,707 WARN L202 SmtUtils]: Spent 6.65 s on a formula simplification. DAG size of input: 2941 DAG size of output: 101 [2021-02-21 21:37:33,824 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-21 21:37:33,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:33,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:37:42,585 WARN L202 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 1250 DAG size of output: 110 [2021-02-21 21:37:42,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:42,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-21 21:37:44,555 WARN L202 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-02-21 21:37:44,700 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-21 21:37:44,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:44,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-21 21:37:44,894 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-21 21:37:48,340 WARN L202 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 189 DAG size of output: 100 [2021-02-21 21:37:48,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:48,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-21 21:37:53,444 WARN L202 SmtUtils]: Spent 4.97 s on a formula simplification. DAG size of input: 183 DAG size of output: 150 [2021-02-21 21:37:53,554 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-02-21 21:37:53,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:53,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-21 21:37:55,895 WARN L202 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 96 DAG size of output: 96 [2021-02-21 21:37:55,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:37:55,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-21 21:38:05,098 WARN L202 SmtUtils]: Spent 9.02 s on a formula simplification. DAG size of input: 2939 DAG size of output: 99 [2021-02-21 21:38:05,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:05,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-21 21:38:05,420 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-02-21 21:38:07,868 WARN L202 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-02-21 21:38:07,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:38:07,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-21 21:38:09,765 WARN L202 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 81 DAG size of output: 81