/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/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:50:13,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:50:13,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:50:13,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:50:13,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:50:13,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:50:13,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:50:13,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:50:13,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:50:13,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:50:13,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:50:13,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:50:13,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:50:13,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:50:13,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:50:13,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:50:13,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:50:13,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:50:13,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:50:13,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:50:13,771 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 01:50:13,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:50:13,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:50:13,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:50:13,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:50:13,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:50:13,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:50:13,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:50:13,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:50:13,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:50:13,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:50:13,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:50:13,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:50:13,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:50:13,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:50:13,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:50:13,806 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:50:13,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:50:13,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:50:13,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:50:13,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:50:13,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:50:13,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:50:13,807 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:50:13,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:50:14,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:50:14,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:50:14,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:50:14,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:50:14,319 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:50:14,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2021-02-22 01:50:14,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fad961c/b953ae088f094aa3964d8b99fd087bad/FLAG3935163e4 [2021-02-22 01:50:15,140 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:50:15,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2021-02-22 01:50:15,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fad961c/b953ae088f094aa3964d8b99fd087bad/FLAG3935163e4 [2021-02-22 01:50:15,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4fad961c/b953ae088f094aa3964d8b99fd087bad [2021-02-22 01:50:15,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:50:15,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:50:15,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:50:15,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:50:15,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:50:15,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738c8f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15, skipping insertion in model container [2021-02-22 01:50:15,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:50:15,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:50:15,794 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/sum_10x0-2.c[481,494] [2021-02-22 01:50:15,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:50:15,811 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:50:15,830 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/sum_10x0-2.c[481,494] [2021-02-22 01:50:15,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:50:15,848 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:50:15,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15 WrapperNode [2021-02-22 01:50:15,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:50:15,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:50:15,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:50:15,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:50:15,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (1/1) ... [2021-02-22 01:50:15,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:50:15,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:50:15,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:50:15,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:50:15,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (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 01:50:16,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:50:16,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:50:16,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:50:16,019 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-22 01:50:16,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:50:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:50:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:50:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:50:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:50:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-22 01:50:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:50:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:50:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:50:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:50:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:50:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:50:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:50:16,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:50:16,367 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:50:16,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:50:16 BoogieIcfgContainer [2021-02-22 01:50:16,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:50:16,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:50:16,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:50:16,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:50:16,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:50:15" (1/3) ... [2021-02-22 01:50:16,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef4bde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:50:16, skipping insertion in model container [2021-02-22 01:50:16,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:50:15" (2/3) ... [2021-02-22 01:50:16,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ef4bde6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:50:16, skipping insertion in model container [2021-02-22 01:50:16,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:50:16" (3/3) ... [2021-02-22 01:50:16,412 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2021-02-22 01:50:16,436 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:50:16,452 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:50:16,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:50:16,545 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:50:16,545 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:50:16,545 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:50:16,546 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:50:16,546 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:50:16,546 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:50:16,546 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:50:16,546 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:50:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-22 01:50:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-22 01:50:16,595 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:16,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:50:16,597 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:16,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-22 01:50:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:16,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54918602] [2021-02-22 01:50:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:16,768 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:17,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:17,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,301 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 01:50:17,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54918602] [2021-02-22 01:50:17,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:17,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:50:17,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059292456] [2021-02-22 01:50:17,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:50:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:50:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:50:17,340 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-22 01:50:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:17,652 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-22 01:50:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 01:50:17,655 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-22 01:50:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:17,667 INFO L225 Difference]: With dead ends: 48 [2021-02-22 01:50:17,667 INFO L226 Difference]: Without dead ends: 33 [2021-02-22 01:50:17,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:50:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-22 01:50:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-22 01:50:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-22 01:50:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-22 01:50:17,741 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-22 01:50:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:17,742 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-22 01:50:17,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:50:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-22 01:50:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 01:50:17,747 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:17,747 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:50:17,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:50:17,748 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:17,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-22 01:50:17,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:17,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989244964] [2021-02-22 01:50:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:17,755 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:17,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:17,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:17,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:17,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:17,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:17,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-22 01:50:17,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989244964] [2021-02-22 01:50:17,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:17,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 01:50:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425751448] [2021-02-22 01:50:17,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 01:50:17,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:18,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 01:50:18,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-22 01:50:18,001 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-22 01:50:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:18,289 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-22 01:50:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:50:18,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-22 01:50:18,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:18,292 INFO L225 Difference]: With dead ends: 44 [2021-02-22 01:50:18,292 INFO L226 Difference]: Without dead ends: 38 [2021-02-22 01:50:18,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-22 01:50:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-22 01:50:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-22 01:50:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-22 01:50:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-22 01:50:18,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-22 01:50:18,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:18,311 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-22 01:50:18,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 01:50:18,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-22 01:50:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 01:50:18,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:18,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:50:18,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:50:18,313 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-22 01:50:18,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:18,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908539761] [2021-02-22 01:50:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:18,318 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:18,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:18,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,457 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:18,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-22 01:50:18,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908539761] [2021-02-22 01:50:18,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:18,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 01:50:18,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256099048] [2021-02-22 01:50:18,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 01:50:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 01:50:18,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-22 01:50:18,539 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2021-02-22 01:50:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:18,830 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-22 01:50:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 01:50:18,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2021-02-22 01:50:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:18,833 INFO L225 Difference]: With dead ends: 49 [2021-02-22 01:50:18,833 INFO L226 Difference]: Without dead ends: 43 [2021-02-22 01:50:18,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:50:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-22 01:50:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-22 01:50:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-22 01:50:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-22 01:50:18,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-22 01:50:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:18,848 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-22 01:50:18,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 01:50:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-22 01:50:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-22 01:50:18,850 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:18,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:50:18,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 01:50:18,851 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-22 01:50:18,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:18,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862438007] [2021-02-22 01:50:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:18,855 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:18,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:18,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:18,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:18,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:18,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:18,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,069 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:19,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-22 01:50:19,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862438007] [2021-02-22 01:50:19,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:19,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:50:19,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938364504] [2021-02-22 01:50:19,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:50:19,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:50:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:50:19,115 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2021-02-22 01:50:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:19,480 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-02-22 01:50:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 01:50:19,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-02-22 01:50:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:19,482 INFO L225 Difference]: With dead ends: 54 [2021-02-22 01:50:19,482 INFO L226 Difference]: Without dead ends: 48 [2021-02-22 01:50:19,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-22 01:50:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-22 01:50:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-22 01:50:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-22 01:50:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-22 01:50:19,497 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 53 [2021-02-22 01:50:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:19,498 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-22 01:50:19,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:50:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-22 01:50:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-22 01:50:19,499 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:19,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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, 1] [2021-02-22 01:50:19,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 01:50:19,500 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 54098690, now seen corresponding path program 4 times [2021-02-22 01:50:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:19,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175245400] [2021-02-22 01:50:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:19,504 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:19,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:19,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,596 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:19,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:19,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:19,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-02-22 01:50:19,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175245400] [2021-02-22 01:50:19,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:19,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-22 01:50:19,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081599635] [2021-02-22 01:50:19,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-22 01:50:19,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:19,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-22 01:50:19,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-22 01:50:19,738 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2021-02-22 01:50:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:20,163 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-02-22 01:50:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 01:50:20,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2021-02-22 01:50:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:20,169 INFO L225 Difference]: With dead ends: 59 [2021-02-22 01:50:20,169 INFO L226 Difference]: Without dead ends: 53 [2021-02-22 01:50:20,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-22 01:50:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-22 01:50:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-22 01:50:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-22 01:50:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-22 01:50:20,184 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 62 [2021-02-22 01:50:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:20,184 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-22 01:50:20,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-22 01:50:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-22 01:50:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-22 01:50:20,186 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:20,186 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1] [2021-02-22 01:50:20,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-22 01:50:20,186 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:20,187 INFO L82 PathProgramCache]: Analyzing trace with hash -406982872, now seen corresponding path program 5 times [2021-02-22 01:50:20,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:20,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591646981] [2021-02-22 01:50:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:20,190 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:20,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:20,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:20,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:20,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:20,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:20,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-02-22 01:50:20,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591646981] [2021-02-22 01:50:20,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:20,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-22 01:50:20,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024820406] [2021-02-22 01:50:20,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-22 01:50:20,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:20,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-22 01:50:20,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-22 01:50:20,497 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2021-02-22 01:50:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:20,965 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-02-22 01:50:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-22 01:50:20,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-02-22 01:50:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:20,968 INFO L225 Difference]: With dead ends: 64 [2021-02-22 01:50:20,968 INFO L226 Difference]: Without dead ends: 58 [2021-02-22 01:50:20,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-02-22 01:50:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-22 01:50:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-22 01:50:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-22 01:50:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-22 01:50:20,984 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 71 [2021-02-22 01:50:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:20,985 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-22 01:50:20,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-22 01:50:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-22 01:50:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-22 01:50:20,986 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:20,986 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 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, 1] [2021-02-22 01:50:20,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 01:50:20,987 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 507179274, now seen corresponding path program 6 times [2021-02-22 01:50:20,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:20,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948681776] [2021-02-22 01:50:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:20,990 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:21,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:21,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:21,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:21,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:21,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:21,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-02-22 01:50:21,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948681776] [2021-02-22 01:50:21,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:21,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-22 01:50:21,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702404048] [2021-02-22 01:50:21,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-22 01:50:21,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-22 01:50:21,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-22 01:50:21,386 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2021-02-22 01:50:21,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:21,919 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-02-22 01:50:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-22 01:50:21,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-22 01:50:21,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:21,921 INFO L225 Difference]: With dead ends: 69 [2021-02-22 01:50:21,922 INFO L226 Difference]: Without dead ends: 63 [2021-02-22 01:50:21,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-02-22 01:50:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-22 01:50:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-22 01:50:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-22 01:50:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-22 01:50:21,952 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2021-02-22 01:50:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:21,954 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-22 01:50:21,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-22 01:50:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-22 01:50:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-22 01:50:21,957 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:21,957 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 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, 1] [2021-02-22 01:50:21,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-22 01:50:21,958 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash -326332640, now seen corresponding path program 7 times [2021-02-22 01:50:21,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:21,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755996396] [2021-02-22 01:50:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:21,962 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:22,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:22,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:22,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:22,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:22,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:22,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-02-22 01:50:22,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755996396] [2021-02-22 01:50:22,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:22,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-22 01:50:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776472361] [2021-02-22 01:50:22,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-22 01:50:22,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:22,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-22 01:50:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-22 01:50:22,390 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2021-02-22 01:50:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:23,013 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-02-22 01:50:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 01:50:23,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-02-22 01:50:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:23,016 INFO L225 Difference]: With dead ends: 74 [2021-02-22 01:50:23,016 INFO L226 Difference]: Without dead ends: 68 [2021-02-22 01:50:23,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-02-22 01:50:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-22 01:50:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-02-22 01:50:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-22 01:50:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-02-22 01:50:23,036 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 89 [2021-02-22 01:50:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:23,038 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-02-22 01:50:23,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-22 01:50:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-02-22 01:50:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-22 01:50:23,040 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:23,040 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 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, 1] [2021-02-22 01:50:23,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-22 01:50:23,041 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1949113106, now seen corresponding path program 8 times [2021-02-22 01:50:23,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:23,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393856319] [2021-02-22 01:50:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:23,046 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:23,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:23,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:23,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:23,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:23,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:23,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-02-22 01:50:23,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393856319] [2021-02-22 01:50:23,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:23,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-22 01:50:23,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227354083] [2021-02-22 01:50:23,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-22 01:50:23,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:23,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-22 01:50:23,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-22 01:50:23,487 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2021-02-22 01:50:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:24,150 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-02-22 01:50:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-22 01:50:24,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-02-22 01:50:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:24,153 INFO L225 Difference]: With dead ends: 79 [2021-02-22 01:50:24,153 INFO L226 Difference]: Without dead ends: 73 [2021-02-22 01:50:24,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-02-22 01:50:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-22 01:50:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-22 01:50:24,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-22 01:50:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-02-22 01:50:24,193 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 98 [2021-02-22 01:50:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:24,193 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-02-22 01:50:24,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-22 01:50:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-02-22 01:50:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-22 01:50:24,195 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:24,195 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 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, 1] [2021-02-22 01:50:24,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-22 01:50:24,196 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1213774616, now seen corresponding path program 9 times [2021-02-22 01:50:24,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:24,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805927735] [2021-02-22 01:50:24,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:24,200 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:24,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:24,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:50:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,297 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:50:24,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-22 01:50:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-22 01:50:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:50:24,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:50:24,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:50:24,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:50:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-02-22 01:50:24,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805927735] [2021-02-22 01:50:24,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:50:24,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-22 01:50:24,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389352430] [2021-02-22 01:50:24,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-22 01:50:24,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:50:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-22 01:50:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-22 01:50:24,882 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2021-02-22 01:50:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:50:25,561 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-02-22 01:50:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-22 01:50:25,562 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2021-02-22 01:50:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:50:25,563 INFO L225 Difference]: With dead ends: 84 [2021-02-22 01:50:25,563 INFO L226 Difference]: Without dead ends: 78 [2021-02-22 01:50:25,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2021-02-22 01:50:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-22 01:50:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-22 01:50:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-22 01:50:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-02-22 01:50:25,597 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 107 [2021-02-22 01:50:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:50:25,598 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-02-22 01:50:25,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-22 01:50:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-02-22 01:50:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-02-22 01:50:25,599 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:50:25,600 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 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, 1] [2021-02-22 01:50:25,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-22 01:50:25,600 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:50:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:50:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash -241993446, now seen corresponding path program 10 times [2021-02-22 01:50:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:50:25,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870767941] [2021-02-22 01:50:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:50:25,604 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:50:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:50:25,628 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:50:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:50:25,652 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:50:25,696 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:50:25,697 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:50:25,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-22 01:50:25,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:50:25 BoogieIcfgContainer [2021-02-22 01:50:25,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:50:25,723 INFO L168 Benchmark]: Toolchain (without parser) took 10216.12 ms. Allocated memory was 156.2 MB in the beginning and 278.9 MB in the end (delta: 122.7 MB). Free memory was 132.2 MB in the beginning and 244.7 MB in the end (delta: -112.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:50:25,723 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 156.2 MB. Free memory was 128.5 MB in the beginning and 128.5 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:50:25,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.84 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 122.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:50:25,724 INFO L168 Benchmark]: Boogie Preprocessor took 38.17 ms. Allocated memory is still 156.2 MB. Free memory was 122.0 MB in the beginning and 120.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:50:25,724 INFO L168 Benchmark]: RCFGBuilder took 479.91 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 137.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-02-22 01:50:25,725 INFO L168 Benchmark]: TraceAbstraction took 9330.34 ms. Allocated memory was 156.2 MB in the beginning and 278.9 MB in the end (delta: 122.7 MB). Free memory was 137.2 MB in the beginning and 244.7 MB in the end (delta: -107.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:50:25,726 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 156.2 MB. Free memory was 128.5 MB in the beginning and 128.5 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.84 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 122.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.17 ms. Allocated memory is still 156.2 MB. Free memory was 122.0 MB in the beginning and 120.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 479.91 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 137.7 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9330.34 ms. Allocated memory was 156.2 MB in the beginning and 278.9 MB in the end (delta: 122.7 MB). Free memory was 137.2 MB in the beginning and 244.7 MB in the end (delta: -107.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 10; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND FALSE !(n <= 0) [L9] CALL, EXPR sum(n - 1, m + 1) [L6] COND TRUE n <= 0 [L7] return m + n; [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 263 SDtfs, 681 SDslu, 587 SDs, 0 SdLazy, 989 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred 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...