/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:39:24,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:39:24,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:39:24,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:39:24,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:39:24,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:39:24,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:39:24,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:39:24,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:39:24,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:39:24,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:39:24,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:39:24,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:39:24,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:39:24,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:39:24,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:39:24,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:39:24,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:39:24,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:39:24,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:39:24,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:39:24,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:39:24,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:39:24,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:39:24,608 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:39:24,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:39:24,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:39:24,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:39:24,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:39:24,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:39:24,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:39:24,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:39:24,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:39:24,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:39:24,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:39:24,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:39:24,611 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:39:24,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:39:24,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:39:24,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:39:24,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:39:24,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:39:24,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:39:24,612 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:39:25,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:39:25,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:39:25,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:39:25,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:39:25,040 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:39:25,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2021-02-23 17:39:25,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128fdd907/24b317ddeb254062a1e77d2c02501923/FLAG6bb561cac [2021-02-23 17:39:25,684 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:39:25,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2021-02-23 17:39:25,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128fdd907/24b317ddeb254062a1e77d2c02501923/FLAG6bb561cac [2021-02-23 17:39:26,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128fdd907/24b317ddeb254062a1e77d2c02501923 [2021-02-23 17:39:26,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:39:26,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:39:26,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:39:26,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:39:26,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:39:26,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1515f4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26, skipping insertion in model container [2021-02-23 17:39:26,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:39:26,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:39:26,398 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c[780,793] [2021-02-23 17:39:26,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:39:26,418 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:39:26,438 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c[780,793] [2021-02-23 17:39:26,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:39:26,459 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:39:26,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26 WrapperNode [2021-02-23 17:39:26,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:39:26,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:39:26,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:39:26,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:39:26,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... [2021-02-23 17:39:26,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:39:26,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:39:26,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:39:26,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:39:26,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:39:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:39:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:39:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:39:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-02-23 17:39:26,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:39:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:39:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:39:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:39:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:39:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:39:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-02-23 17:39:26,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:39:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:39:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:39:26,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:39:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:39:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:39:26,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:39:27,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:39:27,014 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:39:27,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:39:27 BoogieIcfgContainer [2021-02-23 17:39:27,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:39:27,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:39:27,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:39:27,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:39:27,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:39:26" (1/3) ... [2021-02-23 17:39:27,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f00d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:39:27, skipping insertion in model container [2021-02-23 17:39:27,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:39:26" (2/3) ... [2021-02-23 17:39:27,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f00d6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:39:27, skipping insertion in model container [2021-02-23 17:39:27,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:39:27" (3/3) ... [2021-02-23 17:39:27,041 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2021-02-23 17:39:27,051 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:39:27,055 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:39:27,073 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:39:27,099 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:39:27,099 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:39:27,099 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:39:27,099 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:39:27,100 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:39:27,100 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:39:27,100 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:39:27,100 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:39:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-23 17:39:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 17:39:27,127 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:27,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:27,129 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1720389558, now seen corresponding path program 1 times [2021-02-23 17:39:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:27,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060018271] [2021-02-23 17:39:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:27,272 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:27,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:27,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:27,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:27,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:27,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:27,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:27,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:27,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:27,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:27,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:27,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:27,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:27,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:27,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:39:27,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060018271] [2021-02-23 17:39:27,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:27,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:39:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901193386] [2021-02-23 17:39:27,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:39:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:39:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:39:27,790 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2021-02-23 17:39:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:28,179 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-02-23 17:39:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:39:28,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-02-23 17:39:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:28,194 INFO L225 Difference]: With dead ends: 57 [2021-02-23 17:39:28,194 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 17:39:28,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:39:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 17:39:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-23 17:39:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 17:39:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-02-23 17:39:28,262 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2021-02-23 17:39:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:28,263 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-02-23 17:39:28,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:39:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-02-23 17:39:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 17:39:28,265 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:28,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:28,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:39:28,266 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:28,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:28,267 INFO L82 PathProgramCache]: Analyzing trace with hash 529255775, now seen corresponding path program 1 times [2021-02-23 17:39:28,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:28,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26011370] [2021-02-23 17:39:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:28,271 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:28,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:28,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:28,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:28,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:28,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:28,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:28,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:28,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:39:28,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26011370] [2021-02-23 17:39:28,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:28,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:39:28,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248705869] [2021-02-23 17:39:28,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:39:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:39:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:39:28,427 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2021-02-23 17:39:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:28,824 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-02-23 17:39:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:39:28,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-23 17:39:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:28,831 INFO L225 Difference]: With dead ends: 46 [2021-02-23 17:39:28,831 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 17:39:28,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:39:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 17:39:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-02-23 17:39:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 17:39:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-02-23 17:39:28,868 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2021-02-23 17:39:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:28,869 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-02-23 17:39:28,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:39:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-02-23 17:39:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 17:39:28,873 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:28,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:28,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:39:28,874 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2022064132, now seen corresponding path program 1 times [2021-02-23 17:39:28,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:28,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101855691] [2021-02-23 17:39:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:28,879 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:28,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:28,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:28,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:28,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:28,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:28,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,017 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-23 17:39:29,018 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-23 17:39:29,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 17:39:29,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-23 17:39:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-23 17:39:29,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101855691] [2021-02-23 17:39:29,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:29,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 17:39:29,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172726558] [2021-02-23 17:39:29,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 17:39:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 17:39:29,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 17:39:29,074 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-02-23 17:39:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:29,366 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-02-23 17:39:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 17:39:29,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2021-02-23 17:39:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:29,368 INFO L225 Difference]: With dead ends: 62 [2021-02-23 17:39:29,369 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 17:39:29,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:39:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 17:39:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-23 17:39:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 17:39:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-02-23 17:39:29,387 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 43 [2021-02-23 17:39:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:29,387 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-02-23 17:39:29,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 17:39:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-02-23 17:39:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 17:39:29,390 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:29,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:29,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:39:29,391 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:29,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1557176765, now seen corresponding path program 1 times [2021-02-23 17:39:29,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:29,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033104419] [2021-02-23 17:39:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:29,396 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:29,590 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:29,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:29,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:29,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 17:39:29,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033104419] [2021-02-23 17:39:29,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:29,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:39:29,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759561472] [2021-02-23 17:39:29,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:39:29,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:39:29,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:39:29,670 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2021-02-23 17:39:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:30,099 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-02-23 17:39:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:39:30,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-23 17:39:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:30,103 INFO L225 Difference]: With dead ends: 66 [2021-02-23 17:39:30,104 INFO L226 Difference]: Without dead ends: 60 [2021-02-23 17:39:30,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:39:30,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-23 17:39:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-02-23 17:39:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 17:39:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-02-23 17:39:30,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 44 [2021-02-23 17:39:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:30,127 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-02-23 17:39:30,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:39:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-02-23 17:39:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-23 17:39:30,130 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:30,131 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:30,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:39:30,131 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash 648924713, now seen corresponding path program 2 times [2021-02-23 17:39:30,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:30,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444289185] [2021-02-23 17:39:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:30,135 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,264 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:39:30,265 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:39:30,276 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:39:30,277 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:39:30,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-23 17:39:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444289185] [2021-02-23 17:39:30,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:30,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:39:30,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868580911] [2021-02-23 17:39:30,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:39:30,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:39:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:39:30,334 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 9 states. [2021-02-23 17:39:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:30,730 INFO L93 Difference]: Finished difference Result 118 states and 161 transitions. [2021-02-23 17:39:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:39:30,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2021-02-23 17:39:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:30,742 INFO L225 Difference]: With dead ends: 118 [2021-02-23 17:39:30,742 INFO L226 Difference]: Without dead ends: 74 [2021-02-23 17:39:30,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:39:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-23 17:39:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-02-23 17:39:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-23 17:39:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2021-02-23 17:39:30,782 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 61 [2021-02-23 17:39:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:30,783 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2021-02-23 17:39:30,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:39:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2021-02-23 17:39:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-23 17:39:30,785 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:30,785 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:30,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:39:30,786 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:30,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1192280198, now seen corresponding path program 3 times [2021-02-23 17:39:30,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:30,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774006189] [2021-02-23 17:39:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:30,793 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:30,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:30,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:30,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:30,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:30,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:31,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-23 17:39:31,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774006189] [2021-02-23 17:39:31,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:31,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:39:31,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280124507] [2021-02-23 17:39:31,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:39:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:39:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:39:31,100 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 10 states. [2021-02-23 17:39:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:31,617 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-02-23 17:39:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:39:31,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2021-02-23 17:39:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:31,620 INFO L225 Difference]: With dead ends: 96 [2021-02-23 17:39:31,620 INFO L226 Difference]: Without dead ends: 90 [2021-02-23 17:39:31,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:39:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-23 17:39:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-02-23 17:39:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-23 17:39:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-02-23 17:39:31,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 62 [2021-02-23 17:39:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:31,651 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-02-23 17:39:31,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:39:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-02-23 17:39:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-02-23 17:39:31,654 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:31,654 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:31,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:39:31,655 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1291659719, now seen corresponding path program 4 times [2021-02-23 17:39:31,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:31,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036286462] [2021-02-23 17:39:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:31,658 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:31,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:31,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:31,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:31,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:39:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:31,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:39:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:31,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:31,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-02-23 17:39:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036286462] [2021-02-23 17:39:32,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:32,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:39:32,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192101960] [2021-02-23 17:39:32,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:39:32,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:32,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:39:32,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:39:32,022 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand 12 states. [2021-02-23 17:39:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:32,640 INFO L93 Difference]: Finished difference Result 146 states and 199 transitions. [2021-02-23 17:39:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:39:32,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 133 [2021-02-23 17:39:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:32,644 INFO L225 Difference]: With dead ends: 146 [2021-02-23 17:39:32,644 INFO L226 Difference]: Without dead ends: 140 [2021-02-23 17:39:32,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-02-23 17:39:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-02-23 17:39:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-02-23 17:39:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-02-23 17:39:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 178 transitions. [2021-02-23 17:39:32,687 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 178 transitions. Word has length 133 [2021-02-23 17:39:32,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:32,688 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 178 transitions. [2021-02-23 17:39:32,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:39:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 178 transitions. [2021-02-23 17:39:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-02-23 17:39:32,693 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:32,693 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:32,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:39:32,693 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash 573666925, now seen corresponding path program 5 times [2021-02-23 17:39:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:32,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232972528] [2021-02-23 17:39:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:32,697 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:32,767 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,768 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:32,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:32,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:39:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 17:39:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:32,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:32,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:32,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:32,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:32,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:32,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:33,017 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-23 17:39:33,017 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-23 17:39:33,031 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-23 17:39:33,032 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-23 17:39:33,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:33,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:39:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:33,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-02-23 17:39:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:33,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:33,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:33,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 92 proven. 32 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-02-23 17:39:33,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232972528] [2021-02-23 17:39:33,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:33,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:39:33,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397708964] [2021-02-23 17:39:33,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:39:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:39:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:39:33,247 INFO L87 Difference]: Start difference. First operand 128 states and 178 transitions. Second operand 13 states. [2021-02-23 17:39:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:34,123 INFO L93 Difference]: Finished difference Result 424 states and 757 transitions. [2021-02-23 17:39:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 17:39:34,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 203 [2021-02-23 17:39:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:34,127 INFO L225 Difference]: With dead ends: 424 [2021-02-23 17:39:34,127 INFO L226 Difference]: Without dead ends: 154 [2021-02-23 17:39:34,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-02-23 17:39:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-23 17:39:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-02-23 17:39:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-02-23 17:39:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-02-23 17:39:34,192 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 203 [2021-02-23 17:39:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:34,193 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-02-23 17:39:34,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:39:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-02-23 17:39:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-02-23 17:39:34,196 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:34,197 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:34,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:39:34,197 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1157257800, now seen corresponding path program 6 times [2021-02-23 17:39:34,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:34,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165839236] [2021-02-23 17:39:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:34,201 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:39:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 17:39:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:34,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-23 17:39:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:39:34,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:39:34,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-02-23 17:39:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,496 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-23 17:39:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-23 17:39:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 17:39:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:39:34,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:39:34,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:39:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-02-23 17:39:34,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165839236] [2021-02-23 17:39:34,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:39:34,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 17:39:34,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317109926] [2021-02-23 17:39:34,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 17:39:34,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:39:34,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 17:39:34,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-23 17:39:34,545 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand 12 states. [2021-02-23 17:39:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:39:35,009 INFO L93 Difference]: Finished difference Result 258 states and 321 transitions. [2021-02-23 17:39:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:39:35,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2021-02-23 17:39:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:39:35,012 INFO L225 Difference]: With dead ends: 258 [2021-02-23 17:39:35,012 INFO L226 Difference]: Without dead ends: 119 [2021-02-23 17:39:35,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-23 17:39:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-23 17:39:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-02-23 17:39:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-02-23 17:39:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2021-02-23 17:39:35,038 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 151 [2021-02-23 17:39:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:39:35,038 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2021-02-23 17:39:35,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 17:39:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2021-02-23 17:39:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-02-23 17:39:35,041 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:39:35,041 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:39:35,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 17:39:35,041 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:39:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:39:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1928970547, now seen corresponding path program 7 times [2021-02-23 17:39:35,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:39:35,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075208356] [2021-02-23 17:39:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:39:35,045 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:39:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:39:35,066 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:39:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 17:39:35,087 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 17:39:35,154 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 17:39:35,154 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 17:39:35,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 17:39:35,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:39:35 BoogieIcfgContainer [2021-02-23 17:39:35,194 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:39:35,195 INFO L168 Benchmark]: Toolchain (without parser) took 9098.63 ms. Allocated memory was 159.4 MB in the beginning and 276.8 MB in the end (delta: 117.4 MB). Free memory was 135.9 MB in the beginning and 186.9 MB in the end (delta: -51.1 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:35,195 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 159.4 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:39:35,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.59 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 125.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:35,196 INFO L168 Benchmark]: Boogie Preprocessor took 35.42 ms. Allocated memory is still 159.4 MB. Free memory was 125.4 MB in the beginning and 124.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:35,198 INFO L168 Benchmark]: RCFGBuilder took 520.11 ms. Allocated memory is still 159.4 MB. Free memory was 123.8 MB in the beginning and 109.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:35,199 INFO L168 Benchmark]: TraceAbstraction took 8171.25 ms. Allocated memory was 159.4 MB in the beginning and 276.8 MB in the end (delta: 117.4 MB). Free memory was 109.3 MB in the beginning and 186.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 40.1 MB. Max. memory is 8.0 GB. [2021-02-23 17:39:35,202 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 159.4 MB. Free memory is still 133.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 345.59 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 125.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.42 ms. Allocated memory is still 159.4 MB. Free memory was 125.4 MB in the beginning and 124.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 520.11 ms. Allocated memory is still 159.4 MB. Free memory was 123.8 MB in the beginning and 109.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8171.25 ms. Allocated memory was 159.4 MB in the beginning and 276.8 MB in the end (delta: 117.4 MB). Free memory was 109.3 MB in the beginning and 186.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 40.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 35]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L30] int x = __VERIFIER_nondet_int(); [L31] CALL, EXPR fibonacci(x) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND TRUE n == 1 [L22] return 1; [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND TRUE n < 1 [L20] return 0; [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND FALSE !(n < 1) [L21] COND TRUE n == 1 [L22] return 1; [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND TRUE n == 1 [L22] return 1; [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND TRUE n < 1 [L20] return 0; [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR fibonacci(n-1) [L19] COND FALSE !(n < 1) [L21] COND TRUE n == 1 [L22] return 1; [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND TRUE n < 1 [L20] return 0; [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-1) [L24] CALL, EXPR fibonacci(n-2) [L19] COND FALSE !(n < 1) [L21] COND TRUE n == 1 [L22] return 1; [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L24] RET, EXPR fibonacci(n-2) [L24] return fibonacci(n-1) + fibonacci(n-2); [L31] RET, EXPR fibonacci(x) [L31] int result = fibonacci(x); [L32] COND FALSE !(x != 5 || result == 3) [L35] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 10, TraceHistogramMax: 21, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 588 SDslu, 501 SDs, 0 SdLazy, 1323 SolverSat, 336 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred 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: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...