/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:29:25,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:29:25,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:29:25,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:29:25,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:29:25,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:29:25,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:29:25,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:29:25,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:29:25,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:29:25,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:29:25,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:29:25,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:29:25,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:29:25,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:29:25,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:29:25,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:29:25,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:29:25,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:29:25,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:29:25,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:29:25,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:29:25,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:29:25,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:29:25,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:29:25,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:29:25,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:29:25,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:29:25,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:29:25,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:29:25,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:29:25,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:29:25,577 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:29:25,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:29:25,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:29:25,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:29:25,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:29:25,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:29:25,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:29:25,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:29:25,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:29:25,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:29:25,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:29:25,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:29:25,579 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:29:25,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:29:25,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:29:25,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:29:25,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:29:25,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:29:25,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:29:25,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:29:25,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:29:26,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:29:26,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:29:26,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:29:26,022 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:29:26,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2021-02-21 20:29:26,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff3c470f/554a01d2b8f641cc8841c77a2d5fafbf/FLAGb25ab68b1 [2021-02-21 20:29:26,783 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:29:26,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2021-02-21 20:29:26,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff3c470f/554a01d2b8f641cc8841c77a2d5fafbf/FLAGb25ab68b1 [2021-02-21 20:29:27,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ff3c470f/554a01d2b8f641cc8841c77a2d5fafbf [2021-02-21 20:29:27,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:29:27,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:29:27,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:29:27,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:29:27,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:29:27,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705e1695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27, skipping insertion in model container [2021-02-21 20:29:27,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:29:27,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:29:27,513 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] [2021-02-21 20:29:27,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:29:27,534 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:29:27,555 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] [2021-02-21 20:29:27,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:29:27,577 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:29:27,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27 WrapperNode [2021-02-21 20:29:27,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:29:27,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:29:27,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:29:27,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:29:27,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (1/1) ... [2021-02-21 20:29:27,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:29:27,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:29:27,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:29:27,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:29:27,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (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 [2021-02-21 20:29:27,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:29:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:29:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:29:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-02-21 20:29:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:29:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:29:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:29:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:29:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:29:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-02-21 20:29:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:29:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:29:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:29:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:29:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:29:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:29:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:29:28,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:29:28,170 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:29:28,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:29:28 BoogieIcfgContainer [2021-02-21 20:29:28,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:29:28,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:29:28,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:29:28,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:29:28,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:29:27" (1/3) ... [2021-02-21 20:29:28,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffd4574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:29:28, skipping insertion in model container [2021-02-21 20:29:28,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:29:27" (2/3) ... [2021-02-21 20:29:28,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffd4574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:29:28, skipping insertion in model container [2021-02-21 20:29:28,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:29:28" (3/3) ... [2021-02-21 20:29:28,184 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2021-02-21 20:29:28,192 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:29:28,226 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:29:28,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:29:28,323 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:29:28,323 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:29:28,323 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:29:28,324 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:29:28,324 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:29:28,325 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:29:28,327 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:29:28,327 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:29:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-21 20:29:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 20:29:28,364 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:28,365 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] [2021-02-21 20:29:28,366 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1485133070, now seen corresponding path program 1 times [2021-02-21 20:29:28,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:28,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257959126] [2021-02-21 20:29:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:28,531 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:28,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:28,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:28,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:28,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:28,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:28,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:28,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:28,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:28,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:28,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:29,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:29,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:29:29,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257959126] [2021-02-21 20:29:29,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:29,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:29:29,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083990049] [2021-02-21 20:29:29,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:29:29,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:29:29,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:29:29,125 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2021-02-21 20:29:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:29,451 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-02-21 20:29:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:29:29,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-21 20:29:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:29,466 INFO L225 Difference]: With dead ends: 48 [2021-02-21 20:29:29,467 INFO L226 Difference]: Without dead ends: 33 [2021-02-21 20:29:29,471 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 [2021-02-21 20:29:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-21 20:29:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-21 20:29:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-21 20:29:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-02-21 20:29:29,538 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2021-02-21 20:29:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:29,539 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-02-21 20:29:29,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:29:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-02-21 20:29:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 20:29:29,542 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:29,542 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] [2021-02-21 20:29:29,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:29:29,543 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:29,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1822905144, now seen corresponding path program 1 times [2021-02-21 20:29:29,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:29,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994173442] [2021-02-21 20:29:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:29,568 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:29,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:29,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:29,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:29,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:29,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:29,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:29,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:29,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-21 20:29:29,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994173442] [2021-02-21 20:29:29,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:29,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:29:29,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089878075] [2021-02-21 20:29:29,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:29:29,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:29:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:29:29,773 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2021-02-21 20:29:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:30,055 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-02-21 20:29:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:29:30,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-21 20:29:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:30,057 INFO L225 Difference]: With dead ends: 44 [2021-02-21 20:29:30,058 INFO L226 Difference]: Without dead ends: 38 [2021-02-21 20:29:30,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:29:30,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-21 20:29:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-02-21 20:29:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 20:29:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-21 20:29:30,074 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-02-21 20:29:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:30,075 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-21 20:29:30,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:29:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-21 20:29:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 20:29:30,077 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:30,077 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] [2021-02-21 20:29:30,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:29:30,078 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:30,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:30,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1004193542, now seen corresponding path program 2 times [2021-02-21 20:29:30,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:30,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232261250] [2021-02-21 20:29:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:30,083 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:30,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:30,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:30,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:30,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-21 20:29:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232261250] [2021-02-21 20:29:30,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:30,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:29:30,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166620350] [2021-02-21 20:29:30,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:29:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:29:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:29:30,331 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2021-02-21 20:29:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:30,734 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-02-21 20:29:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:29:30,735 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2021-02-21 20:29:30,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:30,742 INFO L225 Difference]: With dead ends: 49 [2021-02-21 20:29:30,742 INFO L226 Difference]: Without dead ends: 43 [2021-02-21 20:29:30,743 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 [2021-02-21 20:29:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-21 20:29:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-21 20:29:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 20:29:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-21 20:29:30,780 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 44 [2021-02-21 20:29:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:30,781 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-21 20:29:30,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:29:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-21 20:29:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-21 20:29:30,787 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:30,788 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] [2021-02-21 20:29:30,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:29:30,789 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:30,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1655724848, now seen corresponding path program 3 times [2021-02-21 20:29:30,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:30,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857330170] [2021-02-21 20:29:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:30,798 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:30,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:30,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:30,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:30,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:30,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:30,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:31,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-21 20:29:31,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857330170] [2021-02-21 20:29:31,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:31,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:29:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081733637] [2021-02-21 20:29:31,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:29:31,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:29:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:29:31,151 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2021-02-21 20:29:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:31,507 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-02-21 20:29:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:29:31,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2021-02-21 20:29:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:31,510 INFO L225 Difference]: With dead ends: 54 [2021-02-21 20:29:31,510 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 20:29:31,511 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 [2021-02-21 20:29:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 20:29:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-21 20:29:31,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-21 20:29:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-02-21 20:29:31,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 53 [2021-02-21 20:29:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:31,526 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-02-21 20:29:31,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:29:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-02-21 20:29:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-21 20:29:31,527 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:31,528 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] [2021-02-21 20:29:31,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:29:31,528 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 54098690, now seen corresponding path program 4 times [2021-02-21 20:29:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:31,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886226612] [2021-02-21 20:29:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:31,532 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:31,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:31,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:31,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:31,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:31,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-02-21 20:29:31,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886226612] [2021-02-21 20:29:31,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:31,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:29:31,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370067555] [2021-02-21 20:29:31,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:29:31,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:29:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:29:31,778 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2021-02-21 20:29:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:32,192 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-02-21 20:29:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:29:32,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2021-02-21 20:29:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:32,199 INFO L225 Difference]: With dead ends: 59 [2021-02-21 20:29:32,199 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 20:29:32,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:29:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 20:29:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-21 20:29:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 20:29:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-02-21 20:29:32,229 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 62 [2021-02-21 20:29:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:32,230 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-02-21 20:29:32,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:29:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-02-21 20:29:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-21 20:29:32,231 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:32,232 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] [2021-02-21 20:29:32,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:29:32,232 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -406982872, now seen corresponding path program 5 times [2021-02-21 20:29:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:32,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982059058] [2021-02-21 20:29:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:32,236 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:32,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:32,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:32,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:32,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:32,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:32,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-02-21 20:29:32,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982059058] [2021-02-21 20:29:32,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:32,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:29:32,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041567818] [2021-02-21 20:29:32,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:29:32,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:32,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:29:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:29:32,501 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2021-02-21 20:29:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:33,024 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-02-21 20:29:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:29:33,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2021-02-21 20:29:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:33,027 INFO L225 Difference]: With dead ends: 64 [2021-02-21 20:29:33,027 INFO L226 Difference]: Without dead ends: 58 [2021-02-21 20:29:33,029 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 [2021-02-21 20:29:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-21 20:29:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-21 20:29:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-21 20:29:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-21 20:29:33,048 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 71 [2021-02-21 20:29:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:33,049 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-21 20:29:33,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:29:33,049 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-21 20:29:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-21 20:29:33,050 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:33,051 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] [2021-02-21 20:29:33,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:29:33,051 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash 507179274, now seen corresponding path program 6 times [2021-02-21 20:29:33,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:33,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339410776] [2021-02-21 20:29:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:33,055 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:33,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:33,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:33,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-02-21 20:29:33,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339410776] [2021-02-21 20:29:33,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:33,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 20:29:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550780493] [2021-02-21 20:29:33,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 20:29:33,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 20:29:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:29:33,389 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2021-02-21 20:29:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:33,890 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-02-21 20:29:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:29:33,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-21 20:29:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:33,893 INFO L225 Difference]: With dead ends: 69 [2021-02-21 20:29:33,893 INFO L226 Difference]: Without dead ends: 63 [2021-02-21 20:29:33,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-02-21 20:29:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-21 20:29:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-21 20:29:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 20:29:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-21 20:29:33,910 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2021-02-21 20:29:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:33,911 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-21 20:29:33,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 20:29:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-21 20:29:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-21 20:29:33,912 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:33,913 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] [2021-02-21 20:29:33,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:29:33,913 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:33,914 INFO L82 PathProgramCache]: Analyzing trace with hash -326332640, now seen corresponding path program 7 times [2021-02-21 20:29:33,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:33,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469128200] [2021-02-21 20:29:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:33,917 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:33,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:33,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:33,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:33,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:33,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:33,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:34,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-02-21 20:29:34,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469128200] [2021-02-21 20:29:34,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:34,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:29:34,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220458256] [2021-02-21 20:29:34,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:29:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:29:34,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:29:34,340 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2021-02-21 20:29:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:34,879 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-02-21 20:29:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:29:34,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2021-02-21 20:29:34,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:34,884 INFO L225 Difference]: With dead ends: 74 [2021-02-21 20:29:34,884 INFO L226 Difference]: Without dead ends: 68 [2021-02-21 20:29:34,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2021-02-21 20:29:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-21 20:29:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-02-21 20:29:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-21 20:29:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-02-21 20:29:34,924 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 89 [2021-02-21 20:29:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:34,925 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-02-21 20:29:34,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:29:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-02-21 20:29:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-21 20:29:34,930 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:34,931 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] [2021-02-21 20:29:34,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:29:34,931 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1949113106, now seen corresponding path program 8 times [2021-02-21 20:29:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:34,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689022411] [2021-02-21 20:29:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:34,935 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:34,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:34,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:34,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:34,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:34,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:35,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:35,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:35,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:35,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-02-21 20:29:35,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689022411] [2021-02-21 20:29:35,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:35,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 20:29:35,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729083840] [2021-02-21 20:29:35,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 20:29:35,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 20:29:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:29:35,410 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2021-02-21 20:29:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:36,034 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-02-21 20:29:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 20:29:36,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-02-21 20:29:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:36,036 INFO L225 Difference]: With dead ends: 79 [2021-02-21 20:29:36,036 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 20:29:36,037 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 [2021-02-21 20:29:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 20:29:36,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-02-21 20:29:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-21 20:29:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-02-21 20:29:36,055 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 98 [2021-02-21 20:29:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-02-21 20:29:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 20:29:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-02-21 20:29:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-02-21 20:29:36,057 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:36,057 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] [2021-02-21 20:29:36,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:29:36,057 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1213774616, now seen corresponding path program 9 times [2021-02-21 20:29:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:36,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260032886] [2021-02-21 20:29:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:36,061 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:36,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:36,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:29:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:29:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:29:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,401 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:29:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:29:36,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:29:36,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:29:36,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:29:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-02-21 20:29:36,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260032886] [2021-02-21 20:29:36,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:29:36,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 20:29:36,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974758427] [2021-02-21 20:29:36,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 20:29:36,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:29:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 20:29:36,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:29:36,523 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2021-02-21 20:29:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:29:37,113 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-02-21 20:29:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:29:37,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2021-02-21 20:29:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:29:37,116 INFO L225 Difference]: With dead ends: 84 [2021-02-21 20:29:37,116 INFO L226 Difference]: Without dead ends: 78 [2021-02-21 20:29:37,118 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 [2021-02-21 20:29:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-21 20:29:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-02-21 20:29:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-21 20:29:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-02-21 20:29:37,141 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 107 [2021-02-21 20:29:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:29:37,141 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-02-21 20:29:37,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 20:29:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-02-21 20:29:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-02-21 20:29:37,142 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:29:37,143 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] [2021-02-21 20:29:37,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:29:37,143 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:29:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:29:37,144 INFO L82 PathProgramCache]: Analyzing trace with hash -241993446, now seen corresponding path program 10 times [2021-02-21 20:29:37,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:29:37,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552091684] [2021-02-21 20:29:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:29:37,148 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:29:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:29:37,187 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:29:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:29:37,214 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:29:37,269 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:29:37,269 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:29:37,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 20:29:37,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:29:37 BoogieIcfgContainer [2021-02-21 20:29:37,298 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:29:37,299 INFO L168 Benchmark]: Toolchain (without parser) took 10106.58 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 128.1 MB in the beginning and 108.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 135.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:37,300 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 152.0 MB. Free memory is still 127.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:29:37,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.78 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 117.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:37,303 INFO L168 Benchmark]: Boogie Preprocessor took 60.58 ms. Allocated memory is still 152.0 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:37,303 INFO L168 Benchmark]: RCFGBuilder took 529.10 ms. Allocated memory is still 152.0 MB. Free memory was 116.4 MB in the beginning and 102.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:37,303 INFO L168 Benchmark]: TraceAbstraction took 9123.43 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 102.5 MB in the beginning and 108.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 109.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:29:37,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 152.0 MB. Free memory is still 127.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 369.78 ms. Allocated memory is still 152.0 MB. Free memory was 127.0 MB in the beginning and 117.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.58 ms. Allocated memory is still 152.0 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 529.10 ms. Allocated memory is still 152.0 MB. Free memory was 116.4 MB in the beginning and 102.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9123.43 ms. Allocated memory was 152.0 MB in the beginning and 267.4 MB in the end (delta: 115.3 MB). Free memory was 102.5 MB in the beginning and 108.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 109.5 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: 8.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 4.6s, 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, 3.5s 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...