/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:46:37,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:46:37,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:46:37,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:46:37,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:46:37,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:46:37,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:46:37,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:46:37,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:46:37,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:46:37,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:46:37,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:46:37,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:46:37,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:46:37,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:46:37,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:46:37,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:46:37,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:46:37,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:46:37,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:46:37,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:46:37,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:46:37,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:46:37,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:46:37,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:46:37,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:46:37,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:46:37,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:46:37,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:46:37,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:46:37,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:46:37,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:46:37,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:46:37,667 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:46:37,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:46:37,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:46:37,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:46:37,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:46:37,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:46:37,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:46:37,669 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:46:37,669 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:46:38,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:46:38,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:46:38,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:46:38,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:46:38,162 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:46:38,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2021-02-22 01:46:38,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c7d6c5b/c5721ed2cb7d4a65a4ff8e35407f899a/FLAGf582acdf2 [2021-02-22 01:46:38,989 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:46:38,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2021-02-22 01:46:38,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c7d6c5b/c5721ed2cb7d4a65a4ff8e35407f899a/FLAGf582acdf2 [2021-02-22 01:46:39,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c7d6c5b/c5721ed2cb7d4a65a4ff8e35407f899a [2021-02-22 01:46:39,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:46:39,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:46:39,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:46:39,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:46:39,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:46:39,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13652b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39, skipping insertion in model container [2021-02-22 01:46:39,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:46:39,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:46:39,688 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-simple/fibo_2calls_4-2.c[946,959] [2021-02-22 01:46:39,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:46:39,703 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:46:39,724 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-simple/fibo_2calls_4-2.c[946,959] [2021-02-22 01:46:39,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:46:39,742 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:46:39,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39 WrapperNode [2021-02-22 01:46:39,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:46:39,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:46:39,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:46:39,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:46:39,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... [2021-02-22 01:46:39,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:46:39,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:46:39,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:46:39,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:46:39,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:46:39,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:46:39,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:46:39,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:46:39,885 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-02-22 01:46:39,886 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-02-22 01:46:39,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:46:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 01:46:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:46:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:46:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:46:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:46:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-02-22 01:46:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-02-22 01:46:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:46:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:46:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:46:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:46:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:46:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:46:39,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:46:40,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:46:40,257 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:46:40,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:46:40 BoogieIcfgContainer [2021-02-22 01:46:40,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:46:40,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:46:40,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:46:40,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:46:40,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:46:39" (1/3) ... [2021-02-22 01:46:40,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2597b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:46:40, skipping insertion in model container [2021-02-22 01:46:40,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:46:39" (2/3) ... [2021-02-22 01:46:40,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2597b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:46:40, skipping insertion in model container [2021-02-22 01:46:40,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:46:40" (3/3) ... [2021-02-22 01:46:40,286 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2021-02-22 01:46:40,305 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:46:40,313 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:46:40,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:46:40,377 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:46:40,377 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:46:40,377 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:46:40,377 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:46:40,378 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:46:40,378 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:46:40,378 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:46:40,378 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:46:40,395 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-22 01:46:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 01:46:40,405 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:40,406 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] [2021-02-22 01:46:40,407 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash 2042570277, now seen corresponding path program 1 times [2021-02-22 01:46:40,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:40,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725957985] [2021-02-22 01:46:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:40,507 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:40,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:40,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:40,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:40,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:40,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:40,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:40,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:40,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:40,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:40,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:46:40,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725957985] [2021-02-22 01:46:40,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:40,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 01:46:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44018673] [2021-02-22 01:46:40,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 01:46:40,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 01:46:40,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 01:46:40,828 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2021-02-22 01:46:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:41,251 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-02-22 01:46:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:46:41,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-22 01:46:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:41,264 INFO L225 Difference]: With dead ends: 70 [2021-02-22 01:46:41,265 INFO L226 Difference]: Without dead ends: 50 [2021-02-22 01:46:41,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:46:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-22 01:46:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-22 01:46:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-22 01:46:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-22 01:46:41,333 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 24 [2021-02-22 01:46:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:41,333 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-22 01:46:41,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 01:46:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-22 01:46:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 01:46:41,336 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:41,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:41,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:46:41,337 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash -589714176, now seen corresponding path program 1 times [2021-02-22 01:46:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:41,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724080175] [2021-02-22 01:46:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:41,343 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:41,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:41,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:46:41,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724080175] [2021-02-22 01:46:41,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:41,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 01:46:41,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021053895] [2021-02-22 01:46:41,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 01:46:41,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 01:46:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 01:46:41,479 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 6 states. [2021-02-22 01:46:41,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:41,820 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-02-22 01:46:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:46:41,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2021-02-22 01:46:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:41,824 INFO L225 Difference]: With dead ends: 58 [2021-02-22 01:46:41,824 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 01:46:41,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:46:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 01:46:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-22 01:46:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-22 01:46:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-02-22 01:46:41,845 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 25 [2021-02-22 01:46:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:41,846 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-02-22 01:46:41,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 01:46:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-02-22 01:46:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-22 01:46:41,848 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:41,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:41,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:46:41,849 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -374229603, now seen corresponding path program 1 times [2021-02-22 01:46:41,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:41,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326117773] [2021-02-22 01:46:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:41,854 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,962 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-22 01:46:41,962 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-22 01:46:41,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:46:41,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:41,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:41,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:41,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-22 01:46:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:42,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-22 01:46:42,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326117773] [2021-02-22 01:46:42,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:42,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:46:42,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217983260] [2021-02-22 01:46:42,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:46:42,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:46:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:46:42,038 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2021-02-22 01:46:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:42,349 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-02-22 01:46:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:46:42,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-02-22 01:46:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:42,352 INFO L225 Difference]: With dead ends: 90 [2021-02-22 01:46:42,352 INFO L226 Difference]: Without dead ends: 54 [2021-02-22 01:46:42,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:46:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-22 01:46:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-02-22 01:46:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-22 01:46:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-02-22 01:46:42,370 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 41 [2021-02-22 01:46:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:42,370 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-02-22 01:46:42,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:46:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-02-22 01:46:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-22 01:46:42,373 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:42,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:42,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:46:42,374 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:42,375 INFO L82 PathProgramCache]: Analyzing trace with hash -245289899, now seen corresponding path program 1 times [2021-02-22 01:46:42,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:42,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322603642] [2021-02-22 01:46:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:42,378 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:42,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:42,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:42,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:42,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:42,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:42,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:42,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:42,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,558 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:42,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:42,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-22 01:46:42,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322603642] [2021-02-22 01:46:42,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:42,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:46:42,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807264188] [2021-02-22 01:46:42,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:46:42,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:42,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:46:42,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:46:42,583 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2021-02-22 01:46:43,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:43,016 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2021-02-22 01:46:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:46:43,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2021-02-22 01:46:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:43,020 INFO L225 Difference]: With dead ends: 82 [2021-02-22 01:46:43,020 INFO L226 Difference]: Without dead ends: 76 [2021-02-22 01:46:43,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-22 01:46:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-22 01:46:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-02-22 01:46:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-22 01:46:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-02-22 01:46:43,043 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 42 [2021-02-22 01:46:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:43,044 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-02-22 01:46:43,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:46:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-02-22 01:46:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-22 01:46:43,047 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:43,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:43,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:46:43,047 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1853062104, now seen corresponding path program 1 times [2021-02-22 01:46:43,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:43,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975048035] [2021-02-22 01:46:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:43,051 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,206 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-22 01:46:43,206 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-22 01:46:43,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:46:43,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-22 01:46:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-22 01:46:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-22 01:46:43,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975048035] [2021-02-22 01:46:43,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:43,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:46:43,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191598670] [2021-02-22 01:46:43,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:46:43,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:43,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:46:43,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:46:43,259 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 7 states. [2021-02-22 01:46:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:43,521 INFO L93 Difference]: Finished difference Result 138 states and 186 transitions. [2021-02-22 01:46:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:46:43,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2021-02-22 01:46:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:43,524 INFO L225 Difference]: With dead ends: 138 [2021-02-22 01:46:43,524 INFO L226 Difference]: Without dead ends: 78 [2021-02-22 01:46:43,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:46:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-22 01:46:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-22 01:46:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-22 01:46:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-02-22 01:46:43,549 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 58 [2021-02-22 01:46:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:43,549 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-02-22 01:46:43,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:46:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-02-22 01:46:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-22 01:46:43,552 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:43,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:43,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:46:43,553 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1662933173, now seen corresponding path program 1 times [2021-02-22 01:46:43,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:43,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411407719] [2021-02-22 01:46:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:43,556 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,582 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,583 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,654 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-22 01:46:43,655 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-22 01:46:43,670 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-22 01:46:43,670 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-22 01:46:43,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:43,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:46:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:43,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:43,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-22 01:46:43,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411407719] [2021-02-22 01:46:43,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:43,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:46:43,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613857230] [2021-02-22 01:46:43,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:46:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:46:43,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:46:43,746 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand 9 states. [2021-02-22 01:46:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:44,111 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2021-02-22 01:46:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 01:46:44,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2021-02-22 01:46:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:44,114 INFO L225 Difference]: With dead ends: 150 [2021-02-22 01:46:44,115 INFO L226 Difference]: Without dead ends: 86 [2021-02-22 01:46:44,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:46:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-22 01:46:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-02-22 01:46:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-22 01:46:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-02-22 01:46:44,140 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 59 [2021-02-22 01:46:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:44,141 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-02-22 01:46:44,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:46:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-02-22 01:46:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-22 01:46:44,144 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:44,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:44,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 01:46:44,145 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash -702082707, now seen corresponding path program 1 times [2021-02-22 01:46:44,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:44,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306930634] [2021-02-22 01:46:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:44,148 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:44,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:44,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:44,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:44,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:44,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:46:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:44,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:44,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-22 01:46:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306930634] [2021-02-22 01:46:44,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:44,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 01:46:44,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789108035] [2021-02-22 01:46:44,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 01:46:44,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 01:46:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:46:44,341 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 11 states. [2021-02-22 01:46:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:44,946 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2021-02-22 01:46:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-22 01:46:44,947 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2021-02-22 01:46:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:44,949 INFO L225 Difference]: With dead ends: 126 [2021-02-22 01:46:44,949 INFO L226 Difference]: Without dead ends: 120 [2021-02-22 01:46:44,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-22 01:46:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-22 01:46:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-02-22 01:46:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-02-22 01:46:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2021-02-22 01:46:44,986 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 60 [2021-02-22 01:46:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:44,987 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2021-02-22 01:46:44,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 01:46:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2021-02-22 01:46:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-22 01:46:44,989 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:44,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:44,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 01:46:44,990 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1046643654, now seen corresponding path program 1 times [2021-02-22 01:46:44,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:44,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301346442] [2021-02-22 01:46:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:44,993 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,122 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-22 01:46:45,123 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-22 01:46:45,131 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-22 01:46:45,132 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-22 01:46:45,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:46:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-02-22 01:46:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-22 01:46:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301346442] [2021-02-22 01:46:45,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:45,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:46:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285967711] [2021-02-22 01:46:45,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:46:45,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:46:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:46:45,196 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand 10 states. [2021-02-22 01:46:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:45,639 INFO L93 Difference]: Finished difference Result 235 states and 356 transitions. [2021-02-22 01:46:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:46:45,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2021-02-22 01:46:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:45,642 INFO L225 Difference]: With dead ends: 235 [2021-02-22 01:46:45,642 INFO L226 Difference]: Without dead ends: 135 [2021-02-22 01:46:45,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-22 01:46:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-22 01:46:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2021-02-22 01:46:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-22 01:46:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-02-22 01:46:45,680 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 77 [2021-02-22 01:46:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:45,681 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-02-22 01:46:45,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:46:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-02-22 01:46:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-02-22 01:46:45,683 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:45,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:46:45,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 01:46:45,683 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 549553181, now seen corresponding path program 1 times [2021-02-22 01:46:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:45,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620440226] [2021-02-22 01:46:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:45,686 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,795 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:45,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,884 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-22 01:46:45,885 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-22 01:46:45,897 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-22 01:46:45,897 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-22 01:46:45,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:46:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-22 01:46:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:45,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:45,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-22 01:46:45,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620440226] [2021-02-22 01:46:45,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:45,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-22 01:46:45,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388524226] [2021-02-22 01:46:45,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-22 01:46:45,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-22 01:46:46,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-22 01:46:46,000 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 13 states. [2021-02-22 01:46:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:46,646 INFO L93 Difference]: Finished difference Result 265 states and 408 transitions. [2021-02-22 01:46:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-22 01:46:46,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2021-02-22 01:46:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:46,649 INFO L225 Difference]: With dead ends: 265 [2021-02-22 01:46:46,650 INFO L226 Difference]: Without dead ends: 159 [2021-02-22 01:46:46,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-02-22 01:46:46,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-22 01:46:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2021-02-22 01:46:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-02-22 01:46:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 199 transitions. [2021-02-22 01:46:46,688 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 199 transitions. Word has length 78 [2021-02-22 01:46:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:46,689 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 199 transitions. [2021-02-22 01:46:46,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-22 01:46:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 199 transitions. [2021-02-22 01:46:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-02-22 01:46:46,691 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:46,692 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-02-22 01:46:46,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-22 01:46:46,692 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1728392861, now seen corresponding path program 2 times [2021-02-22 01:46:46,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:46,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623838238] [2021-02-22 01:46:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:46,696 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:46:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-22 01:46:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:46,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:46,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:46:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-22 01:46:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,904 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:46:46,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,940 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-22 01:46:46,941 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-22 01:46:46,954 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-22 01:46:46,955 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-22 01:46:46,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:46:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:46:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-22 01:46:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:46,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 01:46:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:46:46,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:46:46,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:46:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-02-22 01:46:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623838238] [2021-02-22 01:46:47,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:46:47,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-22 01:46:47,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061379394] [2021-02-22 01:46:47,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-22 01:46:47,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:46:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-22 01:46:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-02-22 01:46:47,062 INFO L87 Difference]: Start difference. First operand 141 states and 199 transitions. Second operand 17 states. [2021-02-22 01:46:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:46:48,038 INFO L93 Difference]: Finished difference Result 273 states and 428 transitions. [2021-02-22 01:46:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-22 01:46:48,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2021-02-22 01:46:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:46:48,043 INFO L225 Difference]: With dead ends: 273 [2021-02-22 01:46:48,043 INFO L226 Difference]: Without dead ends: 124 [2021-02-22 01:46:48,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-02-22 01:46:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-22 01:46:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2021-02-22 01:46:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-22 01:46:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2021-02-22 01:46:48,073 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 113 [2021-02-22 01:46:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:46:48,073 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2021-02-22 01:46:48,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-22 01:46:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2021-02-22 01:46:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-22 01:46:48,075 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:46:48,075 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-02-22 01:46:48,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-22 01:46:48,076 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:46:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:46:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash -645905939, now seen corresponding path program 1 times [2021-02-22 01:46:48,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:46:48,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139774218] [2021-02-22 01:46:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:46:48,079 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:46:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:46:48,092 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:46:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:46:48,104 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:46:48,143 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:46:48,143 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:46:48,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-22 01:46:48,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:46:48 BoogieIcfgContainer [2021-02-22 01:46:48,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:46:48,170 INFO L168 Benchmark]: Toolchain (without parser) took 8782.89 ms. Allocated memory was 154.1 MB in the beginning and 268.4 MB in the end (delta: 114.3 MB). Free memory was 129.9 MB in the beginning and 171.0 MB in the end (delta: -41.1 MB). Peak memory consumption was 74.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:46:48,170 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:46:48,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.35 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 119.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:46:48,171 INFO L168 Benchmark]: Boogie Preprocessor took 32.73 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:46:48,174 INFO L168 Benchmark]: RCFGBuilder took 482.84 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 134.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:46:48,176 INFO L168 Benchmark]: TraceAbstraction took 7900.31 ms. Allocated memory was 154.1 MB in the beginning and 268.4 MB in the end (delta: 114.3 MB). Free memory was 133.7 MB in the beginning and 171.0 MB in the end (delta: -37.2 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:46:48,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 335.35 ms. Allocated memory is still 154.1 MB. Free memory was 128.8 MB in the beginning and 119.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.73 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 482.84 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 134.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7900.31 ms. Allocated memory was 154.1 MB in the beginning and 268.4 MB in the end (delta: 114.3 MB). Free memory was 133.7 MB in the beginning and 171.0 MB in the end (delta: -37.2 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 4; [L39] CALL, EXPR fibo1(x) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND FALSE !(n == 1) [L15] CALL, EXPR fibo2(n-1) [L20] COND FALSE !(n < 1) [L22] COND TRUE n == 1 [L23] return 1; [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND TRUE n < 1 [L21] return 0; [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) [L15] CALL, EXPR fibo2(n-2) [L20] COND FALSE !(n < 1) [L22] COND FALSE !(n == 1) [L25] CALL, EXPR fibo1(n-1) [L10] COND FALSE !(n < 1) [L12] COND TRUE n == 1 [L13] return 1; [L25] RET, EXPR fibo1(n-1) [L25] CALL, EXPR fibo1(n-2) [L10] COND TRUE n < 1 [L11] return 0; [L25] RET, EXPR fibo1(n-2) [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 3 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.7s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 496 SDtfs, 844 SDslu, 836 SDs, 0 SdLazy, 2452 SolverSat, 356 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 61 StatesRemovedByMinimization, 8 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...