/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:05,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:05,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:05,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:05,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:05,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:05,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:05,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:05,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:05,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:05,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:05,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:05,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:05,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:05,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:05,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:05,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:05,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:05,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:05,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:05,726 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:21:05,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:05,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:05,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:05,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:05,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:05,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:05,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:05,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:05,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:05,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:05,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:05,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:05,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:05,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:05,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:05,754 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:05,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:05,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:05,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:05,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:05,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:05,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:05,755 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:05,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:06,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:06,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:06,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:06,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:06,149 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:06,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2021-02-22 02:21:06,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f0188c6/6a1c31978a49460faf9ab6a580048011/FLAG26da41bdd [2021-02-22 02:21:06,934 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:06,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2021-02-22 02:21:06,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f0188c6/6a1c31978a49460faf9ab6a580048011/FLAG26da41bdd [2021-02-22 02:21:07,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5f0188c6/6a1c31978a49460faf9ab6a580048011 [2021-02-22 02:21:07,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:07,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:07,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:07,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:07,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:07,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103a7665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07, skipping insertion in model container [2021-02-22 02:21:07,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:07,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:07,510 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821] [2021-02-22 02:21:07,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:07,533 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:07,548 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i[808,821] [2021-02-22 02:21:07,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:07,567 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:07,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07 WrapperNode [2021-02-22 02:21:07,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:07,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:07,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:07,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:07,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (1/1) ... [2021-02-22 02:21:07,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:07,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:07,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:07,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:07,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (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 [2021-02-22 02:21:07,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:07,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:07,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:21:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:21:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:07,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:07,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:07,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:07,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:07,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:07,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:07,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:08,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:08,049 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:08,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:08 BoogieIcfgContainer [2021-02-22 02:21:08,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:08,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:08,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:08,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:08,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:07" (1/3) ... [2021-02-22 02:21:08,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c452bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:08, skipping insertion in model container [2021-02-22 02:21:08,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:07" (2/3) ... [2021-02-22 02:21:08,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c452bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:08, skipping insertion in model container [2021-02-22 02:21:08,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:08" (3/3) ... [2021-02-22 02:21:08,089 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2021-02-22 02:21:08,097 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:08,110 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:08,163 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:08,213 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:08,214 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:08,214 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:08,214 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:08,214 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:08,214 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:08,214 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:08,215 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-02-22 02:21:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-22 02:21:08,244 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:08,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:08,246 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2079068707, now seen corresponding path program 1 times [2021-02-22 02:21:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:08,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871137884] [2021-02-22 02:21:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:08,353 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:08,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:08,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:08,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:08,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:08,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:08,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:08,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871137884] [2021-02-22 02:21:08,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:08,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:21:08,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338082330] [2021-02-22 02:21:08,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:21:08,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:21:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:21:08,643 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2021-02-22 02:21:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:08,886 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-02-22 02:21:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:21:08,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-22 02:21:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:08,897 INFO L225 Difference]: With dead ends: 54 [2021-02-22 02:21:08,898 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 02:21:08,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:21:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 02:21:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-02-22 02:21:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-22 02:21:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-02-22 02:21:08,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2021-02-22 02:21:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:08,952 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-02-22 02:21:08,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:21:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-02-22 02:21:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 02:21:08,954 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:08,954 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] [2021-02-22 02:21:08,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:08,955 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1153641451, now seen corresponding path program 1 times [2021-02-22 02:21:08,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:08,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408973470] [2021-02-22 02:21:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:08,991 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:09,006 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:09,013 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:09,017 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:09,027 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:09,045 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:09,052 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:09,057 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:09,058 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:21:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:09,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:09,130 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-22 02:21:09,132 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-22 02:21:09,147 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:09,148 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:09,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:09,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:09,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:09,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:09,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:09,240 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.7 percent of original size [2021-02-22 02:21:09,243 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.7 percent of original size 38 [2021-02-22 02:21:09,283 WARN L141 QuantifierPusher]: treesize reduction 3, result has 82.4 percent of original size [2021-02-22 02:21:09,284 WARN L147 QuantifierPusher]: treesize reduction 3, result has 82.4 percent of original size 14 [2021-02-22 02:21:09,286 WARN L141 QuantifierPusher]: treesize reduction 3, result has 82.4 percent of original size [2021-02-22 02:21:09,287 WARN L147 QuantifierPusher]: treesize reduction 3, result has 82.4 percent of original size 14 [2021-02-22 02:21:09,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-22 02:21:09,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-22 02:21:09,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-22 02:21:09,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:09,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:09,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408973470] [2021-02-22 02:21:09,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:09,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-22 02:21:09,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267147694] [2021-02-22 02:21:09,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-22 02:21:09,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-22 02:21:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-02-22 02:21:09,410 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2021-02-22 02:21:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:09,839 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-02-22 02:21:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 02:21:09,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-02-22 02:21:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:09,841 INFO L225 Difference]: With dead ends: 41 [2021-02-22 02:21:09,841 INFO L226 Difference]: Without dead ends: 36 [2021-02-22 02:21:09,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-02-22 02:21:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-22 02:21:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-02-22 02:21:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-22 02:21:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-22 02:21:09,856 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2021-02-22 02:21:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:09,857 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-22 02:21:09,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-22 02:21:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-22 02:21:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-22 02:21:09,859 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:09,859 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] [2021-02-22 02:21:09,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:09,860 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1814353283, now seen corresponding path program 1 times [2021-02-22 02:21:09,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:09,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418846613] [2021-02-22 02:21:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:09,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:09,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:09,884 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:09,889 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:09,894 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:09,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:09,906 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:09,909 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:09,912 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:09,913 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:09,916 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:09,918 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:09,921 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:09,924 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:09,927 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:09,929 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:09,933 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:09,934 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:09,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:09,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:09,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:09,968 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:09,972 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:09,978 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:09,980 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:09,981 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:10,084 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-22 02:21:10,085 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-22 02:21:10,092 WARN L141 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size [2021-02-22 02:21:10,092 WARN L147 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size 7 [2021-02-22 02:21:10,100 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,101 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:10,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:10,157 WARN L141 QuantifierPusher]: treesize reduction 11, result has 63.3 percent of original size [2021-02-22 02:21:10,158 WARN L147 QuantifierPusher]: treesize reduction 11, result has 63.3 percent of original size 19 [2021-02-22 02:21:10,160 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size [2021-02-22 02:21:10,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:21:10,167 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size 39 [2021-02-22 02:21:10,182 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,184 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,185 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,187 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:10,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:10,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,258 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,259 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,260 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-22 02:21:10,260 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-22 02:21:10,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418846613] [2021-02-22 02:21:10,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:10,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 02:21:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514652359] [2021-02-22 02:21:10,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 02:21:10,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:10,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 02:21:10,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-22 02:21:10,269 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2021-02-22 02:21:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:10,589 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-02-22 02:21:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 02:21:10,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2021-02-22 02:21:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:10,591 INFO L225 Difference]: With dead ends: 51 [2021-02-22 02:21:10,591 INFO L226 Difference]: Without dead ends: 40 [2021-02-22 02:21:10,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-02-22 02:21:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-22 02:21:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-02-22 02:21:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-22 02:21:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-22 02:21:10,604 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2021-02-22 02:21:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:10,605 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-22 02:21:10,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 02:21:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-22 02:21:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:21:10,606 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:10,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:10,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:21:10,607 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash -177447861, now seen corresponding path program 2 times [2021-02-22 02:21:10,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:10,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443950053] [2021-02-22 02:21:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:10,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,629 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:10,631 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:10,633 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:10,641 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:10,644 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:10,646 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:10,647 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:10,649 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:10,650 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:10,652 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:10,655 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:10,657 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:10,659 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:10,661 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:10,662 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:10,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:10,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:10,673 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:10,675 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:10,678 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:10,680 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:10,681 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:10,682 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:10,683 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:10,685 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:10,687 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:10,690 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:10,692 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:10,694 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:10,696 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:10,697 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:10,777 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-22 02:21:10,779 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-22 02:21:10,790 WARN L141 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size [2021-02-22 02:21:10,792 WARN L147 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size 7 [2021-02-22 02:21:10,802 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,806 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:10,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:10,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:10,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:10,863 WARN L141 QuantifierPusher]: treesize reduction 11, result has 63.3 percent of original size [2021-02-22 02:21:10,864 WARN L147 QuantifierPusher]: treesize reduction 11, result has 63.3 percent of original size 19 [2021-02-22 02:21:10,866 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size [2021-02-22 02:21:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:10,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:21:10,870 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size 39 [2021-02-22 02:21:10,891 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,892 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,893 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,894 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:10,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:10,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:10,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:10,968 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,970 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,982 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:10,982 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:10,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:11,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:11,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,085 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:11,086 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:11,104 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-22 02:21:11,105 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-22 02:21:11,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:11,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443950053] [2021-02-22 02:21:11,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:11,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-22 02:21:11,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177332886] [2021-02-22 02:21:11,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-22 02:21:11,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-22 02:21:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-22 02:21:11,117 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 15 states. [2021-02-22 02:21:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:11,638 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-22 02:21:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 02:21:11,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2021-02-22 02:21:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:11,640 INFO L225 Difference]: With dead ends: 57 [2021-02-22 02:21:11,640 INFO L226 Difference]: Without dead ends: 46 [2021-02-22 02:21:11,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-02-22 02:21:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-22 02:21:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-02-22 02:21:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-22 02:21:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-22 02:21:11,654 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 36 [2021-02-22 02:21:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:11,655 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-22 02:21:11,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-22 02:21:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-22 02:21:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-22 02:21:11,656 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:11,656 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:11,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 02:21:11,657 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash 72723731, now seen corresponding path program 3 times [2021-02-22 02:21:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:11,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993895261] [2021-02-22 02:21:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:11,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,678 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:11,680 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:11,682 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:11,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:11,688 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:11,690 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:11,692 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:11,693 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:11,695 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:11,696 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:11,698 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:11,700 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:11,702 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:11,705 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:11,706 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:11,707 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:11,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:11,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:11,719 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:11,720 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:11,723 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:11,725 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:11,725 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:11,726 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:11,728 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:11,729 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:11,731 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:11,733 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:11,735 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:11,737 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:11,739 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:11,740 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:11,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:11,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:11,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:11,777 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,778 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:11,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:11,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:11,813 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:21:11,815 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:21:11,816 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.9 percent of original size [2021-02-22 02:21:11,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:11,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:21:11,821 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.9 percent of original size 35 [2021-02-22 02:21:11,832 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,833 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,833 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,834 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:11,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:11,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:11,874 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,874 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,875 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,876 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:11,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:11,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:11,920 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,921 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,936 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:11,936 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:11,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:11,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:11,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:11,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:11,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:12,006 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:12,007 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:12,007 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:21:12,008 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:21:12,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:12,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:12,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:12,078 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-22 02:21:12,079 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-22 02:21:12,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993895261] [2021-02-22 02:21:12,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:12,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 02:21:12,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545753428] [2021-02-22 02:21:12,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 02:21:12,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 02:21:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-02-22 02:21:12,084 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 16 states. [2021-02-22 02:21:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:12,824 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-02-22 02:21:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-22 02:21:12,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2021-02-22 02:21:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:12,831 INFO L225 Difference]: With dead ends: 69 [2021-02-22 02:21:12,831 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 02:21:12,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-02-22 02:21:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 02:21:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-22 02:21:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-22 02:21:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-02-22 02:21:12,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 42 [2021-02-22 02:21:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:12,852 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-02-22 02:21:12,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 02:21:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-02-22 02:21:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 02:21:12,854 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:12,854 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:12,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 02:21:12,855 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1514269509, now seen corresponding path program 4 times [2021-02-22 02:21:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:12,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153198642] [2021-02-22 02:21:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:12,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:12,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:12,877 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:12,879 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:12,880 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:12,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:12,886 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:12,889 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:12,890 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:12,891 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:12,893 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:12,895 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:12,897 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:12,900 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:12,902 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:12,904 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:12,906 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:12,906 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:12,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:12,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:12,917 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:12,919 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:12,921 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:12,923 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:12,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:12,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:12,933 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:12,935 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:12,936 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:12,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:12,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:12,947 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:12,950 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:12,951 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:12,952 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:12,953 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:12,954 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:12,956 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:12,958 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:12,961 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:12,963 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:12,965 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:12,967 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:12,967 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:13,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:13,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:13,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:13,023 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,032 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:13,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:13,067 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:21:13,069 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:21:13,070 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.9 percent of original size [2021-02-22 02:21:13,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:13,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:21:13,075 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.9 percent of original size 35 [2021-02-22 02:21:13,103 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,103 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,104 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,104 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:13,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:13,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,145 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,146 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,147 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,148 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:13,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:13,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,203 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,205 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,206 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,207 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:13,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:13,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,269 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,270 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,271 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:21:13,271 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:21:13,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:13,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:13,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,329 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:13,330 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:13,331 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:21:13,333 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:21:13,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:13,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:13,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:13,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:13,399 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-22 02:21:13,399 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-22 02:21:13,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153198642] [2021-02-22 02:21:13,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:13,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-22 02:21:13,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039534893] [2021-02-22 02:21:13,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-22 02:21:13,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-22 02:21:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-22 02:21:13,403 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2021-02-22 02:21:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:14,360 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-02-22 02:21:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-22 02:21:14,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2021-02-22 02:21:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:14,365 INFO L225 Difference]: With dead ends: 68 [2021-02-22 02:21:14,366 INFO L226 Difference]: Without dead ends: 57 [2021-02-22 02:21:14,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-02-22 02:21:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-22 02:21:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-02-22 02:21:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-22 02:21:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-02-22 02:21:14,399 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 47 [2021-02-22 02:21:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:14,399 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-02-22 02:21:14,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-22 02:21:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-02-22 02:21:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-22 02:21:14,411 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:14,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:14,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-22 02:21:14,412 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -107037613, now seen corresponding path program 5 times [2021-02-22 02:21:14,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:14,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017036641] [2021-02-22 02:21:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:14,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,441 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:14,442 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:14,444 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:14,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:14,449 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:14,451 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:14,453 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:14,454 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:14,456 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:14,457 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:14,459 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:14,462 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:14,463 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:14,465 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:14,467 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:14,468 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:14,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:14,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:14,479 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:14,481 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:14,483 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:14,485 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:14,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,496 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:14,497 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:14,499 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:14,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:14,503 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:14,505 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:14,507 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:14,508 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:14,508 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:14,510 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:14,511 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:14,513 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:14,515 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:14,517 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:14,519 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:14,521 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:14,522 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:14,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:14,548 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-22 02:21:14,549 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-22 02:21:14,552 WARN L141 QuantifierPusher]: treesize reduction 10, result has 23.1 percent of original size [2021-02-22 02:21:14,553 WARN L147 QuantifierPusher]: treesize reduction 10, result has 23.1 percent of original size 3 [2021-02-22 02:21:14,557 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,558 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:14,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:14,592 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-22 02:21:14,593 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-22 02:21:14,594 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.9 percent of original size [2021-02-22 02:21:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:14,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-22 02:21:14,598 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.9 percent of original size 35 [2021-02-22 02:21:14,609 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,610 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,610 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,611 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:14,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,642 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,648 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,651 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,654 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:14,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,694 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,694 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,705 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,706 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:14,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,777 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,778 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,792 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:21:14,793 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:21:14,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:14,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,862 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,863 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,864 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:21:14,864 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:21:14,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:14,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:14,920 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-22 02:21:14,921 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-22 02:21:14,934 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-22 02:21:14,934 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-22 02:21:14,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:14,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:14,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:14,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:15,014 WARN L141 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size [2021-02-22 02:21:15,015 WARN L147 QuantifierPusher]: treesize reduction 7, result has 12.5 percent of original size 1 [2021-02-22 02:21:15,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017036641] [2021-02-22 02:21:15,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:15,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-22 02:21:15,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714220269] [2021-02-22 02:21:15,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-22 02:21:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-22 02:21:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-02-22 02:21:15,017 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2021-02-22 02:21:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:16,010 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-02-22 02:21:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-22 02:21:16,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-02-22 02:21:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:16,011 INFO L225 Difference]: With dead ends: 73 [2021-02-22 02:21:16,012 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 02:21:16,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-02-22 02:21:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 02:21:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-02-22 02:21:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-22 02:21:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-02-22 02:21:16,027 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 52 [2021-02-22 02:21:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:16,028 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-02-22 02:21:16,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-22 02:21:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-02-22 02:21:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-22 02:21:16,029 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:16,029 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:16,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-22 02:21:16,029 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1350591493, now seen corresponding path program 6 times [2021-02-22 02:21:16,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:16,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136716533] [2021-02-22 02:21:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:16,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,055 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:16,056 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:16,058 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:16,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:16,064 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:16,066 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:16,068 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:16,069 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:16,072 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:16,073 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:16,075 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:16,077 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:16,079 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:16,083 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:16,085 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:16,085 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:16,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:16,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:16,100 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:16,102 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:16,105 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:16,106 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:16,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,118 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:16,119 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:16,122 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:16,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:16,127 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:16,130 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:16,131 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:16,132 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:16,133 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:16,134 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:16,135 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:16,136 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:16,139 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:16,141 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:16,143 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:16,144 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:16,145 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:16,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:16,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:16,184 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-22 02:21:16,185 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-22 02:21:16,192 WARN L141 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size [2021-02-22 02:21:16,192 WARN L147 QuantifierPusher]: treesize reduction 11, result has 38.9 percent of original size 7 [2021-02-22 02:21:16,201 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,201 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:16,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:16,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:16,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:16,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:16,259 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:16,263 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size [2021-02-22 02:21:16,265 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size 26 [2021-02-22 02:21:16,266 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size [2021-02-22 02:21:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:16,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:21:16,270 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size 39 [2021-02-22 02:21:16,305 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,306 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,306 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,307 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,370 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,372 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,373 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,374 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,461 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,461 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,462 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,462 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,574 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,575 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,599 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:16,600 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:16,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,699 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,703 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,718 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:16,719 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:16,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,765 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,818 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,819 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,841 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:16,842 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:16,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:16,938 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:16,939 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:16,939 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:16,940 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:16,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:16,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:16,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:16,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:17,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:17,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:17,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136716533] [2021-02-22 02:21:17,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:17,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-02-22 02:21:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879849209] [2021-02-22 02:21:17,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-22 02:21:17,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-22 02:21:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-02-22 02:21:17,029 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 31 states. [2021-02-22 02:21:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:18,818 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-02-22 02:21:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-22 02:21:18,819 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2021-02-22 02:21:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:18,822 INFO L225 Difference]: With dead ends: 78 [2021-02-22 02:21:18,822 INFO L226 Difference]: Without dead ends: 67 [2021-02-22 02:21:18,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=246, Invalid=3176, Unknown=0, NotChecked=0, Total=3422 [2021-02-22 02:21:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-22 02:21:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-02-22 02:21:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-22 02:21:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-02-22 02:21:18,837 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 57 [2021-02-22 02:21:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:18,838 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-02-22 02:21:18,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-02-22 02:21:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-02-22 02:21:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-22 02:21:18,839 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:18,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:18,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-22 02:21:18,839 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1196276627, now seen corresponding path program 7 times [2021-02-22 02:21:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:18,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881789355] [2021-02-22 02:21:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:18,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:18,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:18,859 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:18,860 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:18,861 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:18,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:18,866 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:18,867 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:18,869 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:18,869 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:18,871 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:18,872 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:18,873 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:18,876 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:18,877 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:18,879 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:18,880 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:18,880 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:18,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:18,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-22 02:21:18,890 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:18,891 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:18,892 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:18,893 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:18,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:18,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:18,903 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-22 02:21:18,904 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-22 02:21:18,905 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:18,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-22 02:21:18,909 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-22 02:21:18,911 WARN L141 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size [2021-02-22 02:21:18,912 WARN L147 QuantifierPusher]: treesize reduction 5, result has 85.7 percent of original size 30 [2021-02-22 02:21:18,913 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:18,914 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:18,915 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:18,916 WARN L141 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size [2021-02-22 02:21:18,917 WARN L147 QuantifierPusher]: treesize reduction 3, result has 83.3 percent of original size 15 [2021-02-22 02:21:18,920 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-22 02:21:18,921 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-22 02:21:18,923 WARN L141 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size [2021-02-22 02:21:18,924 WARN L147 QuantifierPusher]: treesize reduction 5, result has 87.2 percent of original size 34 [2021-02-22 02:21:18,925 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:21:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:18,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:18,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:18,951 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-22 02:21:18,952 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-22 02:21:18,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:18,966 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:18,966 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:18,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:18,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:18,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:18,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:18,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:19,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:19,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:19,015 WARN L141 QuantifierPusher]: treesize reduction 11, result has 63.3 percent of original size [2021-02-22 02:21:19,016 WARN L147 QuantifierPusher]: treesize reduction 11, result has 63.3 percent of original size 19 [2021-02-22 02:21:19,017 WARN L141 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size [2021-02-22 02:21:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:21:19,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-22 02:21:19,021 WARN L147 QuantifierPusher]: treesize reduction -1, result has 102.6 percent of original size 39 [2021-02-22 02:21:19,036 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,036 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,037 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,037 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,103 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,104 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,116 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,117 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,219 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,220 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,220 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,221 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,328 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,329 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,351 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:19,352 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:19,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,452 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,452 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,468 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:19,469 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:19,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,565 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,565 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,566 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:19,566 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:19,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,660 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,661 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,661 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:19,661 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:19,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,764 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-22 02:21:19,765 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-22 02:21:19,792 WARN L141 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-02-22 02:21:19,793 WARN L147 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size 7 [2021-02-22 02:21:19,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-22 02:21:19,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:21:19,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-22 02:21:19,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:19,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:19,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881789355] [2021-02-22 02:21:19,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:19,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-02-22 02:21:19,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103880186] [2021-02-22 02:21:19,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-22 02:21:19,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-22 02:21:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2021-02-22 02:21:19,948 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 34 states. [2021-02-22 02:21:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:21,796 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-02-22 02:21:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-22 02:21:21,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2021-02-22 02:21:21,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:21,798 INFO L225 Difference]: With dead ends: 69 [2021-02-22 02:21:21,798 INFO L226 Difference]: Without dead ends: 0 [2021-02-22 02:21:21,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=270, Invalid=3890, Unknown=0, NotChecked=0, Total=4160 [2021-02-22 02:21:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-22 02:21:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-22 02:21:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-22 02:21:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-22 02:21:21,800 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-02-22 02:21:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:21,800 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-22 02:21:21,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-02-22 02:21:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-22 02:21:21,801 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-22 02:21:21,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-22 02:21:21,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-22 02:21:22,300 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-02-22 02:21:22,609 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-02-22 02:21:22,883 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2021-02-22 02:21:23,105 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-02-22 02:21:23,308 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-02-22 02:21:23,446 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-22 02:21:23,446 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-22 02:21:23,446 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-22 02:21:23,446 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-22 02:21:23,446 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-22 02:21:23,446 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,446 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,446 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-22 02:21:23,446 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-22 02:21:23,446 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-22 02:21:23,447 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)|)) [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 22 29) the Hoare annotation is: true [2021-02-22 02:21:23,447 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (= (* main_~i~0 2) (+ main_~sn~0 2)))) (or (and (= main_~sn~0 0) .cse0) (and (<= 2 main_~i~0) .cse0 (< main_~i~0 4)))) [2021-02-22 02:21:23,447 INFO L185 CegarLoopUtils]: At program point L25(lines 25 26) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 8) .cse0) (and (= main_~i~0 4) .cse0) (and (= main_~sn~0 4) (= main_~i~0 3)) (and (= 7 main_~i~0) .cse0) (and (= main_~i~0 2) (= 2 main_~sn~0)) (and (= (* main_~i~0 2) (+ main_~sn~0 2)) (= main_~i~0 1)) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0))) [2021-02-22 02:21:23,447 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 22 29) the Hoare annotation is: true [2021-02-22 02:21:23,448 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (= main_~sn~0 0) [2021-02-22 02:21:23,448 INFO L192 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-02-22 02:21:23,448 INFO L185 CegarLoopUtils]: At program point L24-3(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 8) .cse0) (and (= main_~i~0 4) .cse0) (and (= 7 main_~i~0) .cse0) (and (= main_~i~0 1) (= 2 main_~sn~0)) (and (= main_~sn~0 4) (= main_~i~0 2)) (and .cse0 (= main_~i~0 3)) (and (= main_~i~0 6) .cse0) (and (= 5 main_~i~0) .cse0))) [2021-02-22 02:21:23,448 INFO L185 CegarLoopUtils]: At program point L24-4(line 24) the Hoare annotation is: (let ((.cse0 (= |main_#t~post3| main_~i~0)) (.cse1 (= 6 main_~sn~0))) (or (and (= main_~sn~0 4) (= main_~i~0 2) .cse0) (and .cse0 .cse1 (= main_~i~0 3)) (and .cse0 (= main_~i~0 8) .cse1) (and .cse0 (= main_~i~0 1) (= 2 main_~sn~0)) (and .cse0 (= 5 main_~i~0) .cse1) (and .cse0 (= main_~i~0 6) .cse1) (and (= 7 main_~i~0) .cse0 .cse1) (and (= main_~i~0 4) .cse0 .cse1))) [2021-02-22 02:21:23,448 INFO L185 CegarLoopUtils]: At program point L24-5(line 24) the Hoare annotation is: (let ((.cse0 (= (+ |main_#t~post3| 1) main_~i~0)) (.cse1 (= 6 main_~sn~0))) (or (and .cse0 (= 2 main_~sn~0) (= |main_#t~post3| 1)) (and (= (* |main_#t~post3| 2) main_~sn~0) .cse0 .cse1) (and (= |main_#t~post3| 6) .cse0 .cse1) (and .cse0 (= |main_#t~post3| 7) .cse1) (and .cse0 (= |main_#t~post3| 4) .cse1) (and .cse0 (= |main_#t~post3| 8) .cse1) (and (= main_~sn~0 4) (= |main_#t~post3| 2) .cse0) (and .cse0 (= |main_#t~post3| 5) .cse1))) [2021-02-22 02:21:23,448 INFO L185 CegarLoopUtils]: At program point L24-6(lines 24 27) the Hoare annotation is: (let ((.cse0 (= 6 main_~sn~0))) (or (and (= main_~i~0 8) .cse0) (and .cse0 (= main_~i~0 9)) (and (= main_~i~0 4) .cse0) (and (= main_~sn~0 4) (= main_~i~0 3)) (and (= 7 main_~i~0) .cse0) (and (= main_~i~0 2) (= 2 main_~sn~0)) (and (= (* main_~i~0 2) (+ main_~sn~0 2)) (= main_~i~0 1)) (and (= 5 main_~i~0) .cse0) (and (= main_~i~0 6) .cse0))) [2021-02-22 02:21:23,448 INFO L185 CegarLoopUtils]: At program point L24-7(lines 24 27) the Hoare annotation is: false [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 22 29) the Hoare annotation is: true [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point L15(lines 15 17) the Hoare annotation is: true [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: true [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point L15-2(lines 14 19) the Hoare annotation is: true [2021-02-22 02:21:23,449 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 14 19) the Hoare annotation is: true [2021-02-22 02:21:23,450 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: true [2021-02-22 02:21:23,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:23 BoogieIcfgContainer [2021-02-22 02:21:23,467 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:23,467 INFO L168 Benchmark]: Toolchain (without parser) took 16152.86 ms. Allocated memory was 151.0 MB in the beginning and 367.0 MB in the end (delta: 216.0 MB). Free memory was 126.6 MB in the beginning and 158.1 MB in the end (delta: -31.6 MB). Peak memory consumption was 185.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:23,468 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:23,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.73 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 116.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:23,468 INFO L168 Benchmark]: Boogie Preprocessor took 34.59 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:23,468 INFO L168 Benchmark]: RCFGBuilder took 448.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 132.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:23,468 INFO L168 Benchmark]: TraceAbstraction took 15410.43 ms. Allocated memory was 151.0 MB in the beginning and 367.0 MB in the end (delta: 216.0 MB). Free memory was 132.4 MB in the beginning and 158.1 MB in the end (delta: -25.7 MB). Peak memory consumption was 189.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:23,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.73 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 116.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.59 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 448.40 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 132.4 MB in the end (delta: -17.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15410.43 ms. Allocated memory was 151.0 MB in the beginning and 367.0 MB in the end (delta: 216.0 MB). Free memory was 132.4 MB in the beginning and 158.1 MB in the end (delta: -25.7 MB). Peak memory consumption was 189.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 24]: Loop Invariant Derived loop invariant: ((((((((i == 8 && 6 == sn) || (6 == sn && i == 9)) || (i == 4 && 6 == sn)) || (sn == 4 && i == 3)) || (7 == i && 6 == sn)) || (i == 2 && 2 == sn)) || (i * 2 == sn + 2 && i == 1)) || (5 == i && 6 == sn)) || (i == 6 && 6 == sn) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.5s, OverallIterations: 9, TraceHistogramMax: 8, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 225 SDtfs, 372 SDslu, 1180 SDs, 0 SdLazy, 3912 SolverSat, 109 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 432 GetRequests, 117 SyntacticMatches, 26 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3838 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 88 PreInvPairs, 152 NumberOfFragments, 444 HoareAnnotationTreeSize, 88 FomulaSimplifications, 15106 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 32 FomulaSimplificationsInter, 1690 FormulaSimplificationTreeSizeReductionInter, 1.3s 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...