/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/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:49:35,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:49:35,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:49:35,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:49:35,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:49:35,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:49:35,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:49:35,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:49:35,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:49:35,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:49:35,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:49:35,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:49:35,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:49:35,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:49:35,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:49:35,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:49:35,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:49:35,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:49:35,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:49:35,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:49:35,731 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 01:49:35,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:49:35,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:49:35,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:49:35,753 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:49:35,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:49:35,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:49:35,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:49:35,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:49:35,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:49:35,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:49:35,755 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:49:35,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:49:35,756 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:49:35,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:49:35,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:49:35,756 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:49:35,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:49:35,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:49:35,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:49:35,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:49:35,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:49:35,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:49:35,757 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:49:35,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:49:36,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:49:36,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:49:36,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:49:36,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:49:36,249 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:49:36,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2021-02-22 01:49:36,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fa766bb9/ad5af440c6164c8d8b5305ecec46d6ca/FLAGa3d8f9925 [2021-02-22 01:49:36,948 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:49:36,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o10.c [2021-02-22 01:49:36,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fa766bb9/ad5af440c6164c8d8b5305ecec46d6ca/FLAGa3d8f9925 [2021-02-22 01:49:37,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fa766bb9/ad5af440c6164c8d8b5305ecec46d6ca [2021-02-22 01:49:37,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:49:37,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:49:37,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:49:37,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:49:37,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:49:37,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b502d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37, skipping insertion in model container [2021-02-22 01:49:37,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:49:37,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:49:37,572 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/id_o10.c[516,529] [2021-02-22 01:49:37,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:49:37,590 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:49:37,610 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/id_o10.c[516,529] [2021-02-22 01:49:37,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:49:37,629 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:49:37,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37 WrapperNode [2021-02-22 01:49:37,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:49:37,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:49:37,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:49:37,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:49:37,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (1/1) ... [2021-02-22 01:49:37,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:49:37,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:49:37,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:49:37,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:49:37,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (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 01:49:37,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:49:37,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:49:37,775 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:49:37,776 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-22 01:49:37,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:49:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 01:49:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:49:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:49:37,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:49:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:49:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-22 01:49:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:49:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:49:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:49:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:49:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:49:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:49:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:49:38,110 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:49:38,110 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:49:38,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:49:38 BoogieIcfgContainer [2021-02-22 01:49:38,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:49:38,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:49:38,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:49:38,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:49:38,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:49:37" (1/3) ... [2021-02-22 01:49:38,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d21f59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:49:38, skipping insertion in model container [2021-02-22 01:49:38,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:49:37" (2/3) ... [2021-02-22 01:49:38,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d21f59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:49:38, skipping insertion in model container [2021-02-22 01:49:38,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:49:38" (3/3) ... [2021-02-22 01:49:38,136 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o10.c [2021-02-22 01:49:38,153 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:49:38,163 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:49:38,182 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:49:38,206 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:49:38,206 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:49:38,206 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:49:38,206 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:49:38,206 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:49:38,206 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:49:38,206 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:49:38,207 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:49:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-22 01:49:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-22 01:49:38,249 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:38,249 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 01:49:38,250 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash 285930827, now seen corresponding path program 1 times [2021-02-22 01:49:38,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:38,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685911095] [2021-02-22 01:49:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:38,346 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:38,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:38,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:49:38,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:49:38,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:38,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:38,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:38,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:38,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:38,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:38,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:38,621 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 01:49:38,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685911095] [2021-02-22 01:49:38,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:38,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 01:49:38,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046850674] [2021-02-22 01:49:38,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 01:49:38,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 01:49:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-22 01:49:38,660 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2021-02-22 01:49:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:39,134 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-02-22 01:49:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:49:39,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-22 01:49:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:39,160 INFO L225 Difference]: With dead ends: 46 [2021-02-22 01:49:39,160 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 01:49:39,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:49:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 01:49:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-22 01:49:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-22 01:49:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-02-22 01:49:39,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2021-02-22 01:49:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:39,254 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-02-22 01:49:39,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 01:49:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-02-22 01:49:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 01:49:39,258 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:39,259 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] [2021-02-22 01:49:39,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:49:39,260 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:39,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash 838352253, now seen corresponding path program 1 times [2021-02-22 01:49:39,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:39,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141156805] [2021-02-22 01:49:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:39,276 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:39,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:39,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:39,387 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:39,389 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:39,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:39,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:39,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:39,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:39,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:39,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:39,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:39,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:39,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:39,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-22 01:49:39,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141156805] [2021-02-22 01:49:39,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:39,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 01:49:39,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693119697] [2021-02-22 01:49:39,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 01:49:39,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:39,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 01:49:39,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-22 01:49:39,548 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2021-02-22 01:49:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:39,880 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-02-22 01:49:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:49:39,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-02-22 01:49:39,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:39,882 INFO L225 Difference]: With dead ends: 39 [2021-02-22 01:49:39,882 INFO L226 Difference]: Without dead ends: 34 [2021-02-22 01:49:39,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-22 01:49:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-22 01:49:39,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-22 01:49:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-22 01:49:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-02-22 01:49:39,896 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2021-02-22 01:49:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:39,897 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-02-22 01:49:39,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 01:49:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-02-22 01:49:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-22 01:49:39,899 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:39,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-22 01:49:39,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:49:39,899 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1267124291, now seen corresponding path program 2 times [2021-02-22 01:49:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:39,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054115768] [2021-02-22 01:49:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:39,903 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:39,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:39,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:39,960 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:39,961 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:39,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:39,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-22 01:49:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054115768] [2021-02-22 01:49:40,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:40,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:49:40,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831677034] [2021-02-22 01:49:40,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:49:40,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:49:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:49:40,133 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2021-02-22 01:49:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:40,622 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-02-22 01:49:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 01:49:40,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2021-02-22 01:49:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:40,624 INFO L225 Difference]: With dead ends: 43 [2021-02-22 01:49:40,625 INFO L226 Difference]: Without dead ends: 38 [2021-02-22 01:49:40,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:49:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-22 01:49:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-22 01:49:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-22 01:49:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-22 01:49:40,638 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 38 [2021-02-22 01:49:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-22 01:49:40,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:49:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-22 01:49:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-22 01:49:40,640 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:40,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:49:40,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:49:40,640 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:40,641 INFO L82 PathProgramCache]: Analyzing trace with hash -655881425, now seen corresponding path program 3 times [2021-02-22 01:49:40,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:40,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642752098] [2021-02-22 01:49:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:40,644 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,694 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:40,695 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:40,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,782 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,905 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:40,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:40,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:40,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-02-22 01:49:40,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642752098] [2021-02-22 01:49:40,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:40,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-22 01:49:40,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925182129] [2021-02-22 01:49:40,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-22 01:49:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-22 01:49:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-02-22 01:49:40,974 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 12 states. [2021-02-22 01:49:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:41,737 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-02-22 01:49:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-22 01:49:41,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2021-02-22 01:49:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:41,739 INFO L225 Difference]: With dead ends: 47 [2021-02-22 01:49:41,739 INFO L226 Difference]: Without dead ends: 42 [2021-02-22 01:49:41,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-22 01:49:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-22 01:49:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-02-22 01:49:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-22 01:49:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-22 01:49:41,753 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 45 [2021-02-22 01:49:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:41,754 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-22 01:49:41,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-22 01:49:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-22 01:49:41,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-22 01:49:41,755 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:41,756 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:49:41,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:49:41,756 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash -492339153, now seen corresponding path program 4 times [2021-02-22 01:49:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497235166] [2021-02-22 01:49:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:41,759 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:41,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:41,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,808 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:41,809 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:41,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:41,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:41,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:41,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:41,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:41,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:41,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:41,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,924 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:41,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:41,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:41,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:41,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:42,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:42,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:42,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:42,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:42,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:42,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:42,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:42,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:42,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:42,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:42,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-02-22 01:49:42,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497235166] [2021-02-22 01:49:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:42,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-22 01:49:42,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083738738] [2021-02-22 01:49:42,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-22 01:49:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-22 01:49:42,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:49:42,086 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2021-02-22 01:49:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:43,063 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-02-22 01:49:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-22 01:49:43,064 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2021-02-22 01:49:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:43,066 INFO L225 Difference]: With dead ends: 51 [2021-02-22 01:49:43,066 INFO L226 Difference]: Without dead ends: 46 [2021-02-22 01:49:43,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-02-22 01:49:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-22 01:49:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-02-22 01:49:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-22 01:49:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-02-22 01:49:43,081 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 52 [2021-02-22 01:49:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:43,081 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-02-22 01:49:43,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-22 01:49:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-02-22 01:49:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-22 01:49:43,082 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:43,083 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 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 01:49:43,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:49:43,083 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1565290209, now seen corresponding path program 5 times [2021-02-22 01:49:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:43,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410073846] [2021-02-22 01:49:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:43,086 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,126 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:43,127 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:43,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:43,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:43,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:43,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-02-22 01:49:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410073846] [2021-02-22 01:49:43,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:43,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 01:49:43,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454590495] [2021-02-22 01:49:43,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 01:49:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 01:49:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-02-22 01:49:43,485 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 16 states. [2021-02-22 01:49:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:44,742 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-02-22 01:49:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-22 01:49:44,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2021-02-22 01:49:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:44,745 INFO L225 Difference]: With dead ends: 55 [2021-02-22 01:49:44,745 INFO L226 Difference]: Without dead ends: 50 [2021-02-22 01:49:44,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-02-22 01:49:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-22 01:49:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-02-22 01:49:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-22 01:49:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-02-22 01:49:44,775 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 59 [2021-02-22 01:49:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:44,776 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-02-22 01:49:44,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 01:49:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-02-22 01:49:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-22 01:49:44,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:44,785 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 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 01:49:44,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 01:49:44,786 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:44,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1220161887, now seen corresponding path program 6 times [2021-02-22 01:49:44,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:44,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030611216] [2021-02-22 01:49:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:44,794 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:44,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:44,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:44,870 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:44,874 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:44,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:44,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:44,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:44,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:44,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:44,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:44,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:44,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:45,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:45,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:45,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:45,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:45,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:45,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:45,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:45,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:45,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:45,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:45,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:45,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:45,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-02-22 01:49:45,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030611216] [2021-02-22 01:49:45,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:45,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-22 01:49:45,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888679384] [2021-02-22 01:49:45,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-22 01:49:45,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:45,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-22 01:49:45,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-02-22 01:49:45,379 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2021-02-22 01:49:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:46,841 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-02-22 01:49:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-22 01:49:46,841 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2021-02-22 01:49:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:46,849 INFO L225 Difference]: With dead ends: 59 [2021-02-22 01:49:46,849 INFO L226 Difference]: Without dead ends: 54 [2021-02-22 01:49:46,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2021-02-22 01:49:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-22 01:49:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-02-22 01:49:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-22 01:49:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-02-22 01:49:46,879 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 66 [2021-02-22 01:49:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:46,879 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-02-22 01:49:46,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-22 01:49:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-02-22 01:49:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-02-22 01:49:46,884 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:46,884 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 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 01:49:46,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 01:49:46,885 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1638307693, now seen corresponding path program 7 times [2021-02-22 01:49:46,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:46,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777852582] [2021-02-22 01:49:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:46,889 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:46,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:46,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:46,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:46,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:46,968 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:46,969 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:47,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:47,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:47,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:47,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-02-22 01:49:47,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777852582] [2021-02-22 01:49:47,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:47,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-22 01:49:47,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235968671] [2021-02-22 01:49:47,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-22 01:49:47,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:47,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-22 01:49:47,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:49:47,464 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2021-02-22 01:49:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:49,087 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-02-22 01:49:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-22 01:49:49,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2021-02-22 01:49:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:49,092 INFO L225 Difference]: With dead ends: 63 [2021-02-22 01:49:49,092 INFO L226 Difference]: Without dead ends: 58 [2021-02-22 01:49:49,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-02-22 01:49:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-22 01:49:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-22 01:49:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-22 01:49:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-22 01:49:49,125 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 73 [2021-02-22 01:49:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:49,126 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-22 01:49:49,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-22 01:49:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-22 01:49:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-22 01:49:49,131 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:49,132 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 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 01:49:49,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 01:49:49,132 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -8117485, now seen corresponding path program 8 times [2021-02-22 01:49:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:49,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293520851] [2021-02-22 01:49:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:49,137 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,205 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:49,210 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:49,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:49,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:49,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:49,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-02-22 01:49:49,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293520851] [2021-02-22 01:49:49,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:49,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-22 01:49:49,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078724791] [2021-02-22 01:49:49,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-22 01:49:49,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-22 01:49:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-02-22 01:49:49,823 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 22 states. [2021-02-22 01:49:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:51,743 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-02-22 01:49:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-22 01:49:51,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 80 [2021-02-22 01:49:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:51,745 INFO L225 Difference]: With dead ends: 67 [2021-02-22 01:49:51,746 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 01:49:51,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2021-02-22 01:49:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 01:49:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-22 01:49:51,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-22 01:49:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-02-22 01:49:51,760 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 80 [2021-02-22 01:49:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:51,761 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-02-22 01:49:51,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-22 01:49:51,761 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-02-22 01:49:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-22 01:49:51,762 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:51,762 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 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 01:49:51,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-22 01:49:51,762 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash -171771835, now seen corresponding path program 9 times [2021-02-22 01:49:51,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:51,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313112004] [2021-02-22 01:49:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:51,765 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:51,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:51,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:51,811 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-22 01:49:51,812 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-22 01:49:51,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:51,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:49:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:51,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:51,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:49:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:51,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:51,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:51,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:51,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:51,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:51,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:51,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:51,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:51,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:51,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:51,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,266 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-22 01:49:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:49:52,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:49:52,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:49:52,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:49:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-02-22 01:49:52,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313112004] [2021-02-22 01:49:52,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:49:52,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-02-22 01:49:52,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773532095] [2021-02-22 01:49:52,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-22 01:49:52,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:49:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-22 01:49:52,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-02-22 01:49:52,468 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 24 states. [2021-02-22 01:49:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:49:54,648 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-02-22 01:49:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-22 01:49:54,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2021-02-22 01:49:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:49:54,649 INFO L225 Difference]: With dead ends: 71 [2021-02-22 01:49:54,650 INFO L226 Difference]: Without dead ends: 66 [2021-02-22 01:49:54,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=199, Invalid=2771, Unknown=0, NotChecked=0, Total=2970 [2021-02-22 01:49:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-22 01:49:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-02-22 01:49:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-22 01:49:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-02-22 01:49:54,664 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 87 [2021-02-22 01:49:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:49:54,665 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-02-22 01:49:54,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-22 01:49:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-02-22 01:49:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-22 01:49:54,666 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:49:54,666 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 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 01:49:54,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-22 01:49:54,667 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:49:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:49:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash 437419397, now seen corresponding path program 10 times [2021-02-22 01:49:54,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:49:54,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642305926] [2021-02-22 01:49:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:49:54,670 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:49:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:49:54,719 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:49:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:49:54,752 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:49:54,795 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:49:54,796 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:49:54,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-22 01:49:54,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:49:54 BoogieIcfgContainer [2021-02-22 01:49:54,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:49:54,828 INFO L168 Benchmark]: Toolchain (without parser) took 17474.44 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 128.4 MB in the beginning and 286.8 MB in the end (delta: -158.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:49:54,829 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:49:54,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.27 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 118.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:49:54,829 INFO L168 Benchmark]: Boogie Preprocessor took 32.79 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 01:49:54,829 INFO L168 Benchmark]: RCFGBuilder took 443.48 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 103.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:49:54,830 INFO L168 Benchmark]: TraceAbstraction took 16706.33 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 103.1 MB in the beginning and 286.8 MB in the end (delta: -183.7 MB). Peak memory consumption was 45.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:49:54,832 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 152.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 262.27 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 118.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.79 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 116.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 443.48 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 103.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16706.33 ms. Allocated memory was 152.0 MB in the beginning and 380.6 MB in the end (delta: 228.6 MB). Free memory was 103.1 MB in the beginning and 286.8 MB in the end (delta: -183.7 MB). Peak memory consumption was 45.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 10 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 335 SDtfs, 356 SDslu, 1717 SDs, 0 SdLazy, 4343 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 445 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=10, 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, 0 StatesRemovedByMinimization, 0 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...