/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:00:04,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:00:04,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:00:04,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 19:00:04,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:00:04,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:00:04,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:00:04,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:00:04,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:00:04,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:00:04,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:00:04,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:00:04,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:00:04,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:00:04,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:00:04,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:00:04,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:00:04,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:00:04,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:00:04,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:00:04,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:00:04,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:00:04,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:00:04,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:00:04,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:00:04,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:00:04,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:00:04,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:00:04,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:00:04,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:00:04,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:00:04,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:00:04,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:00:04,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:00:04,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:00:04,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:00:04,725 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:00:04,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:00:04,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:00:04,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:00:04,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:00:04,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:00:04,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:00:04,726 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:00:05,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:00:05,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:00:05,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:00:05,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:00:05,211 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:00:05,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2021-02-23 19:00:05,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b493de1/d6a6924149f9479dbadcc10bac5234a0/FLAG2639d431b [2021-02-23 19:00:06,037 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:00:06,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2021-02-23 19:00:06,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b493de1/d6a6924149f9479dbadcc10bac5234a0/FLAG2639d431b [2021-02-23 19:00:06,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b493de1/d6a6924149f9479dbadcc10bac5234a0 [2021-02-23 19:00:06,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:00:06,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:00:06,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:00:06,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:00:06,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:00:06,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438f34a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06, skipping insertion in model container [2021-02-23 19:00:06,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:00:06,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:00:06,725 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i[891,904] [2021-02-23 19:00:06,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:00:06,751 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:00:06,770 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i[891,904] [2021-02-23 19:00:06,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:00:06,794 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:00:06,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06 WrapperNode [2021-02-23 19:00:06,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:00:06,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:00:06,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:00:06,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:00:06,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... [2021-02-23 19:00:06,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:00:06,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:00:06,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:00:06,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:00:06,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:00:06,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:00:06,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:00:06,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:00:06,977 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:00:06,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:00:06,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:00:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:00:06,978 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:00:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 19:00:06,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 19:00:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:00:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:00:06,980 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:00:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:00:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:00:06,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:00:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:00:06,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:00:06,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:00:06,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:00:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:00:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:00:07,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:00:07,432 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:00:07,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:00:07 BoogieIcfgContainer [2021-02-23 19:00:07,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:00:07,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:00:07,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:00:07,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:00:07,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:00:06" (1/3) ... [2021-02-23 19:00:07,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13014f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:00:07, skipping insertion in model container [2021-02-23 19:00:07,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:00:06" (2/3) ... [2021-02-23 19:00:07,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13014f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:00:07, skipping insertion in model container [2021-02-23 19:00:07,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:00:07" (3/3) ... [2021-02-23 19:00:07,461 INFO L111 eAbstractionObserver]: Analyzing ICFG half.i [2021-02-23 19:00:07,480 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:00:07,493 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:00:07,543 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:00:07,598 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:00:07,598 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:00:07,598 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:00:07,599 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:00:07,599 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:00:07,599 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:00:07,599 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:00:07,599 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:00:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-23 19:00:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 19:00:07,638 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:07,640 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] [2021-02-23 19:00:07,640 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash 535719879, now seen corresponding path program 1 times [2021-02-23 19:00:07,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:07,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025530798] [2021-02-23 19:00:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:07,777 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:07,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:07,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:07,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:07,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:07,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:08,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:08,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025530798] [2021-02-23 19:00:08,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:08,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 19:00:08,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138275880] [2021-02-23 19:00:08,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 19:00:08,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:08,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 19:00:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:00:08,048 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2021-02-23 19:00:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:08,166 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-02-23 19:00:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 19:00:08,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-02-23 19:00:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:08,178 INFO L225 Difference]: With dead ends: 52 [2021-02-23 19:00:08,178 INFO L226 Difference]: Without dead ends: 31 [2021-02-23 19:00:08,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:00:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-23 19:00:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-23 19:00:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 19:00:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-02-23 19:00:08,237 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-02-23 19:00:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:08,238 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-02-23 19:00:08,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 19:00:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-02-23 19:00:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 19:00:08,239 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:08,239 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] [2021-02-23 19:00:08,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:00:08,240 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash 520943543, now seen corresponding path program 1 times [2021-02-23 19:00:08,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:08,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426083671] [2021-02-23 19:00:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:08,245 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:08,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:08,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:08,352 WARN L141 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size [2021-02-23 19:00:08,353 WARN L147 QuantifierPusher]: treesize reduction 4, result has 66.7 percent of original size 8 [2021-02-23 19:00:08,362 WARN L141 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size [2021-02-23 19:00:08,364 WARN L147 QuantifierPusher]: treesize reduction 4, result has 75.0 percent of original size 12 [2021-02-23 19:00:08,379 WARN L141 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size [2021-02-23 19:00:08,380 WARN L147 QuantifierPusher]: treesize reduction 8, result has 60.0 percent of original size 12 [2021-02-23 19:00:08,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:08,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:08,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:08,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:08,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:08,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:08,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426083671] [2021-02-23 19:00:08,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:08,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 19:00:08,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166626338] [2021-02-23 19:00:08,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 19:00:08,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 19:00:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:00:08,464 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2021-02-23 19:00:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:08,813 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-02-23 19:00:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 19:00:08,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-02-23 19:00:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:08,816 INFO L225 Difference]: With dead ends: 51 [2021-02-23 19:00:08,816 INFO L226 Difference]: Without dead ends: 35 [2021-02-23 19:00:08,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-02-23 19:00:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-23 19:00:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-02-23 19:00:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-23 19:00:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-23 19:00:08,848 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2021-02-23 19:00:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:08,849 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-23 19:00:08,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 19:00:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-23 19:00:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 19:00:08,854 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:08,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:08,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:00:08,857 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:08,858 INFO L82 PathProgramCache]: Analyzing trace with hash 430650734, now seen corresponding path program 1 times [2021-02-23 19:00:08,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:08,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016140400] [2021-02-23 19:00:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:08,937 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:08,944 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:09,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:09,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:09,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:09,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 19:00:09,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 19:00:09,125 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-23 19:00:09,126 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-23 19:00:09,159 WARN L141 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size [2021-02-23 19:00:09,160 WARN L147 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size 12 [2021-02-23 19:00:09,175 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:09,176 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:09,191 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-23 19:00:09,191 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-23 19:00:09,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:09,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:09,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:09,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:09,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016140400] [2021-02-23 19:00:09,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:09,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:00:09,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493475589] [2021-02-23 19:00:09,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:00:09,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:09,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:00:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-23 19:00:09,235 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 10 states. [2021-02-23 19:00:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:09,693 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-02-23 19:00:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-23 19:00:09,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-23 19:00:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:09,695 INFO L225 Difference]: With dead ends: 50 [2021-02-23 19:00:09,695 INFO L226 Difference]: Without dead ends: 45 [2021-02-23 19:00:09,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:00:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-23 19:00:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-02-23 19:00:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 19:00:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-02-23 19:00:09,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-02-23 19:00:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:09,710 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-02-23 19:00:09,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:00:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-02-23 19:00:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 19:00:09,712 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:09,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:09,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:00:09,712 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash -828200805, now seen corresponding path program 1 times [2021-02-23 19:00:09,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:09,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246491811] [2021-02-23 19:00:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:13,272 WARN L202 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 27 [2021-02-23 19:00:13,280 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-23 19:00:13,310 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-23 19:00:13,311 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:13,314 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:13,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:13,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:13,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:13,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:13,500 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size [2021-02-23 19:00:13,502 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size 20 [2021-02-23 19:00:13,523 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size [2021-02-23 19:00:13,524 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.9 percent of original size 20 [2021-02-23 19:00:13,545 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:13,547 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:13,567 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 19:00:13,568 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 19:00:13,587 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 19:00:13,588 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 19:00:13,613 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-23 19:00:13,614 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-23 19:00:13,637 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-23 19:00:13,639 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-23 19:00:13,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:13,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:13,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:13,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:13,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:13,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:13,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246491811] [2021-02-23 19:00:13,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:13,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-23 19:00:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104990733] [2021-02-23 19:00:13,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-23 19:00:13,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-23 19:00:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-02-23 19:00:13,758 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2021-02-23 19:00:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:14,713 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-02-23 19:00:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-23 19:00:14,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-02-23 19:00:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:14,718 INFO L225 Difference]: With dead ends: 55 [2021-02-23 19:00:14,718 INFO L226 Difference]: Without dead ends: 50 [2021-02-23 19:00:14,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-02-23 19:00:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-23 19:00:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-02-23 19:00:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-23 19:00:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-02-23 19:00:14,733 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2021-02-23 19:00:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:14,734 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-02-23 19:00:14,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-23 19:00:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-02-23 19:00:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-23 19:00:14,735 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:14,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:14,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:00:14,736 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash -509096923, now seen corresponding path program 2 times [2021-02-23 19:00:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:14,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841174592] [2021-02-23 19:00:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:17,596 WARN L202 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-23 19:00:17,601 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-23 19:00:17,604 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-23 19:00:17,605 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:17,607 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:17,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:17,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:17,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:17,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:17,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:17,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:17,680 WARN L141 QuantifierPusher]: treesize reduction 29, result has 59.7 percent of original size [2021-02-23 19:00:17,687 WARN L147 QuantifierPusher]: treesize reduction 29, result has 59.7 percent of original size 43 [2021-02-23 19:00:17,712 WARN L141 QuantifierPusher]: treesize reduction 69, result has 48.1 percent of original size [2021-02-23 19:00:17,715 WARN L147 QuantifierPusher]: treesize reduction 69, result has 48.1 percent of original size 64 [2021-02-23 19:00:17,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:17,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:17,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:17,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:17,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:17,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841174592] [2021-02-23 19:00:17,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:17,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:00:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229867419] [2021-02-23 19:00:17,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:00:17,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:00:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:00:17,757 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 6 states. [2021-02-23 19:00:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:17,998 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-02-23 19:00:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 19:00:17,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2021-02-23 19:00:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:18,000 INFO L225 Difference]: With dead ends: 61 [2021-02-23 19:00:18,001 INFO L226 Difference]: Without dead ends: 48 [2021-02-23 19:00:18,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-23 19:00:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-23 19:00:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-02-23 19:00:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-23 19:00:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-23 19:00:18,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2021-02-23 19:00:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:18,033 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-23 19:00:18,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:00:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-23 19:00:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 19:00:18,034 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:18,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:18,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:00:18,035 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:18,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2105786962, now seen corresponding path program 2 times [2021-02-23 19:00:18,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:18,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118697762] [2021-02-23 19:00:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:18,168 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:18,170 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:18,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:18,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:18,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:18,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:18,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:18,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:18,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:18,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:18,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:18,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:18,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:18,391 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:18,392 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:18,414 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:18,415 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:18,438 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:18,441 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:18,464 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-23 19:00:18,465 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-23 19:00:18,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:18,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:18,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:18,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118697762] [2021-02-23 19:00:18,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:18,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 19:00:18,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429628449] [2021-02-23 19:00:18,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 19:00:18,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 19:00:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-02-23 19:00:18,524 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 16 states. [2021-02-23 19:00:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:19,889 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-02-23 19:00:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 19:00:19,889 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-02-23 19:00:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:19,899 INFO L225 Difference]: With dead ends: 76 [2021-02-23 19:00:19,899 INFO L226 Difference]: Without dead ends: 58 [2021-02-23 19:00:19,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 19:00:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-23 19:00:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-02-23 19:00:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-23 19:00:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-23 19:00:19,935 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-02-23 19:00:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:19,936 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-23 19:00:19,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 19:00:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-23 19:00:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-23 19:00:19,945 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:19,945 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-02-23 19:00:19,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:00:19,946 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2102561335, now seen corresponding path program 3 times [2021-02-23 19:00:19,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:19,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486366504] [2021-02-23 19:00:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:19,966 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-23 19:00:19,968 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-23 19:00:20,005 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-23 19:00:20,010 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-23 19:00:20,050 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-23 19:00:20,052 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-23 19:00:20,098 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-23 19:00:20,101 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-23 19:00:20,163 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:20,165 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:20,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:20,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:20,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:20,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:20,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:20,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:20,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:20,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:20,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:20,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:20,354 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:20,354 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:20,379 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:20,381 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:20,411 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:20,413 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:20,458 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 19:00:20,460 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 19:00:20,489 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 19:00:20,490 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 19:00:20,518 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-23 19:00:20,519 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-23 19:00:20,548 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-23 19:00:20,550 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-23 19:00:20,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:20,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:20,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:20,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:20,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:20,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486366504] [2021-02-23 19:00:20,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:20,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-23 19:00:20,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752762549] [2021-02-23 19:00:20,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-23 19:00:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-23 19:00:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-02-23 19:00:20,680 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2021-02-23 19:00:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:22,602 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-02-23 19:00:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-23 19:00:22,603 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2021-02-23 19:00:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:22,604 INFO L225 Difference]: With dead ends: 68 [2021-02-23 19:00:22,604 INFO L226 Difference]: Without dead ends: 63 [2021-02-23 19:00:22,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2021-02-23 19:00:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-23 19:00:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-02-23 19:00:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-23 19:00:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-02-23 19:00:22,622 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-02-23 19:00:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:22,622 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-02-23 19:00:22,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-23 19:00:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-02-23 19:00:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-23 19:00:22,624 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:22,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:22,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:00:22,624 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1730622729, now seen corresponding path program 4 times [2021-02-23 19:00:22,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:22,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372553482] [2021-02-23 19:00:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:25,891 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 27 [2021-02-23 19:00:25,893 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-23 19:00:25,896 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-23 19:00:25,897 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:25,898 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:25,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:25,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:25,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:25,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:25,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:25,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:25,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:25,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:25,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:25,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:25,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:25,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:26,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:26,018 WARN L141 QuantifierPusher]: treesize reduction 57, result has 25.0 percent of original size [2021-02-23 19:00:26,020 WARN L147 QuantifierPusher]: treesize reduction 57, result has 25.0 percent of original size 19 [2021-02-23 19:00:26,049 WARN L141 QuantifierPusher]: treesize reduction 69, result has 30.3 percent of original size [2021-02-23 19:00:26,052 WARN L147 QuantifierPusher]: treesize reduction 69, result has 30.3 percent of original size 30 [2021-02-23 19:00:26,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:26,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:26,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:26,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372553482] [2021-02-23 19:00:26,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:26,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:00:26,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807527630] [2021-02-23 19:00:26,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:00:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:00:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-23 19:00:26,099 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 10 states. [2021-02-23 19:00:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:26,684 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-23 19:00:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 19:00:26,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2021-02-23 19:00:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:26,685 INFO L225 Difference]: With dead ends: 74 [2021-02-23 19:00:26,685 INFO L226 Difference]: Without dead ends: 61 [2021-02-23 19:00:26,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-23 19:00:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-23 19:00:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-02-23 19:00:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 19:00:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-02-23 19:00:26,703 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2021-02-23 19:00:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:26,703 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-02-23 19:00:26,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:00:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-02-23 19:00:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-23 19:00:26,704 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:26,705 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:26,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:00:26,705 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1938405394, now seen corresponding path program 5 times [2021-02-23 19:00:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:26,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53600104] [2021-02-23 19:00:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:26,820 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:26,822 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:26,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:26,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:26,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:26,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:26,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:26,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:26,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:26,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:26,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:26,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:26,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:27,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:27,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:27,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:27,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:27,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:27,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:27,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:27,101 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:27,103 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:27,131 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:27,131 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:27,155 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 19:00:27,156 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 19:00:27,185 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-23 19:00:27,186 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-23 19:00:27,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:27,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:27,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:27,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53600104] [2021-02-23 19:00:27,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:27,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-23 19:00:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436251350] [2021-02-23 19:00:27,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-23 19:00:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-23 19:00:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:00:27,280 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 19 states. [2021-02-23 19:00:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:28,669 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-02-23 19:00:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 19:00:28,670 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2021-02-23 19:00:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:28,671 INFO L225 Difference]: With dead ends: 82 [2021-02-23 19:00:28,671 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 19:00:28,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-02-23 19:00:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 19:00:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-23 19:00:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 19:00:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-02-23 19:00:28,692 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2021-02-23 19:00:28,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:28,692 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-02-23 19:00:28,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-23 19:00:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-02-23 19:00:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 19:00:28,694 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:00:28,694 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:00:28,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:00:28,694 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:00:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:00:28,695 INFO L82 PathProgramCache]: Analyzing trace with hash -195090917, now seen corresponding path program 6 times [2021-02-23 19:00:28,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:00:28,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95241444] [2021-02-23 19:00:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:00:28,709 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-23 19:00:28,710 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-23 19:00:28,743 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-23 19:00:28,746 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-23 19:00:28,796 WARN L141 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size [2021-02-23 19:00:28,798 WARN L147 QuantifierPusher]: treesize reduction 29, result has 42.0 percent of original size 21 [2021-02-23 19:00:28,832 WARN L141 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size [2021-02-23 19:00:28,836 WARN L147 QuantifierPusher]: treesize reduction 29, result has 49.1 percent of original size 28 [2021-02-23 19:00:32,108 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 27 [2021-02-23 19:00:32,112 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-23 19:00:32,114 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-23 19:00:34,161 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-23 19:00:34,168 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-23 19:00:34,169 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:00:34,170 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:00:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:34,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:34,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:00:34,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:34,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:00:34,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:34,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:00:34,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:34,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:34,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:34,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:34,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:34,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:34,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:34,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:00:34,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:34,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 19:00:34,460 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:34,461 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:34,490 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:34,491 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:34,523 WARN L141 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size [2021-02-23 19:00:34,524 WARN L147 QuantifierPusher]: treesize reduction 6, result has 80.6 percent of original size 25 [2021-02-23 19:00:34,559 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 19:00:34,561 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 19:00:34,593 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-23 19:00:34,594 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-23 19:00:34,624 WARN L141 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size [2021-02-23 19:00:34,625 WARN L147 QuantifierPusher]: treesize reduction 10, result has 60.0 percent of original size 15 [2021-02-23 19:00:34,655 WARN L141 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-02-23 19:00:34,657 WARN L147 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size 9 [2021-02-23 19:00:34,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:34,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:00:34,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:34,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:00:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:00:34,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:00:34,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:00:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:00:34,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95241444] [2021-02-23 19:00:34,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:00:34,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-02-23 19:00:34,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043907213] [2021-02-23 19:00:34,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-23 19:00:34,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:00:34,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-23 19:00:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-02-23 19:00:34,804 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 23 states. [2021-02-23 19:00:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:00:36,381 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-02-23 19:00:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 19:00:36,382 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2021-02-23 19:00:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:00:36,382 INFO L225 Difference]: With dead ends: 63 [2021-02-23 19:00:36,382 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 19:00:36,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2021-02-23 19:00:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 19:00:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 19:00:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 19:00:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 19:00:36,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-02-23 19:00:36,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:00:36,386 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 19:00:36,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-02-23 19:00:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 19:00:36,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 19:00:36,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 19:00:36,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 19:00:36,953 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2021-02-23 19:00:37,064 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-02-23 19:00:37,521 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-23 19:00:37,522 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-23 19:00:37,522 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-23 19:00:37,522 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-23 19:00:37,522 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-23 19:00:37,523 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-23 19:00:37,523 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-23 19:00:37,524 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,524 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,524 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,524 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,524 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 19:00:37,524 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-23 19:00:37,525 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-23 19:00:37,525 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-23 19:00:37,525 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-23 19:00:37,525 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-23 19:00:37,526 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= (+ main_~n~0 1) main_~k~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0))) [2021-02-23 19:00:37,526 INFO L185 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse0 (* 2 |main_#t~post5|))) (and (<= (+ main_~n~0 1) main_~k~0) (<= main_~i~0 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) (<= .cse0 main_~i~0))) [2021-02-23 19:00:37,526 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-23 19:00:37,526 INFO L185 CegarLoopUtils]: At program point L31-2(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |main_#t~post5|)) (.cse2 (* 2 main_~n~0)) (.cse1 (+ main_~i~0 2))) (and (<= main_~i~0 .cse0) (<= .cse1 .cse2) (<= .cse0 main_~i~0) (<= .cse2 .cse1) (< main_~n~0 (+ main_~k~0 1)))) [2021-02-23 19:00:37,526 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-23 19:00:37,526 INFO L185 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-23 19:00:37,527 INFO L185 CegarLoopUtils]: At program point L29-3(lines 29 33) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (let ((.cse3 (+ main_~i~0 1))) (and (<= .cse1 .cse3) (<= .cse3 .cse1) .cse2)))) [2021-02-23 19:00:37,527 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-23 19:00:37,527 INFO L185 CegarLoopUtils]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse3 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ |main_#t~post4| 2)) (.cse2 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse2 .cse1) (<= .cse1 .cse2) .cse3)) (let ((.cse5 (+ |main_#t~post4| 1)) (.cse4 (+ main_~i~0 1))) (and (<= .cse1 .cse4) (<= .cse5 .cse1) (<= .cse1 .cse5) (<= .cse4 .cse1) .cse3)))) [2021-02-23 19:00:37,527 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 36) the Hoare annotation is: true [2021-02-23 19:00:37,528 INFO L185 CegarLoopUtils]: At program point L29-5(line 29) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse0 (+ |main_#t~post4| 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) .cse2)) (let ((.cse3 (+ main_~i~0 1)) (.cse4 (+ |main_#t~post4| 2))) (and (<= .cse1 .cse3) (<= .cse3 .cse1) (<= .cse4 .cse1) (<= .cse1 .cse4) .cse2)))) [2021-02-23 19:00:37,528 INFO L185 CegarLoopUtils]: At program point L29-6(lines 29 33) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0)) (.cse2 (< main_~n~0 (+ main_~k~0 1)))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (and (= main_~i~0 0) (= main_~n~0 0)) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) .cse2))) [2021-02-23 19:00:37,528 INFO L185 CegarLoopUtils]: At program point L29-7(lines 29 33) the Hoare annotation is: (or (and (<= main_~k~0 main_~n~0) (< main_~n~0 (+ main_~k~0 1))) (and (= main_~i~0 0) (= main_~n~0 0) (<= main_~k~0 0))) [2021-02-23 19:00:37,528 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 36) the Hoare annotation is: true [2021-02-23 19:00:37,528 INFO L192 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-02-23 19:00:37,528 INFO L185 CegarLoopUtils]: At program point L30(lines 30 32) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (< main_~n~0 (+ main_~k~0 1)))) (and (<= (+ main_~n~0 1) main_~k~0) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0)))) [2021-02-23 19:00:37,529 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 36) the Hoare annotation is: true [2021-02-23 19:00:37,529 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (and (= main_~i~0 0) (= main_~n~0 0)) [2021-02-23 19:00:37,529 INFO L192 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: true [2021-02-23 19:00:37,529 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (= main_~i~0 0) [2021-02-23 19:00:37,529 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-23 19:00:37,529 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-23 19:00:37,529 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-23 19:00:37,530 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:00:37,531 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:00:37,531 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-23 19:00:37,531 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:00:37,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:00:37 BoogieIcfgContainer [2021-02-23 19:00:37,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:00:37,563 INFO L168 Benchmark]: Toolchain (without parser) took 31127.80 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.6 MB in the beginning and 73.9 MB in the end (delta: 53.6 MB). Peak memory consumption was 104.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:37,564 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:00:37,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.81 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:37,567 INFO L168 Benchmark]: Boogie Preprocessor took 63.16 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:37,568 INFO L168 Benchmark]: RCFGBuilder took 574.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 132.3 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:37,568 INFO L168 Benchmark]: TraceAbstraction took 30122.58 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.7 MB in the beginning and 73.9 MB in the end (delta: 57.8 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:00:37,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 340.81 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.16 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 574.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 132.3 MB in the end (delta: -16.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 30122.58 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.7 MB in the beginning and 73.9 MB in the end (delta: 57.8 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && n < k + 1) || (i == 0 && n == 0)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.7s, OverallIterations: 10, TraceHistogramMax: 6, AutomataDifference: 9.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 278 SDtfs, 507 SDslu, 1071 SDs, 0 SdLazy, 2209 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 35 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 40 LocationsWithAnnotation, 110 PreInvPairs, 178 NumberOfFragments, 448 HoareAnnotationTreeSize, 110 FomulaSimplifications, 20967 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 40 FomulaSimplificationsInter, 1370 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...