/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/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:55:25,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:55:25,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:55:25,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:55:25,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:55:25,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:55:25,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:55:25,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:55:25,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:55:25,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:55:25,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:55:25,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:55:25,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:55:25,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:55:25,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:55:25,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:55:25,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:55:25,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:55:25,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:55:25,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:55:25,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:55:25,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:55:25,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:55:25,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:55:25,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:55:25,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:55:25,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:55:25,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:55:25,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:55:25,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:55:25,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:55:25,614 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:55:25,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:55:25,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:55:25,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:55:25,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:55:25,616 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:55:25,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:55:25,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:55:25,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:55:25,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:55:25,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:55:25,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:55:25,618 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:55:26,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:55:26,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:55:26,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:55:26,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:55:26,120 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:55:26,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2021-02-23 17:55:26,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a3a8bd7/631582bec31445529f805c1a3b43c543/FLAGd3a9b0f2c [2021-02-23 17:55:26,863 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:55:26,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2021-02-23 17:55:26,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a3a8bd7/631582bec31445529f805c1a3b43c543/FLAGd3a9b0f2c [2021-02-23 17:55:26,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31a3a8bd7/631582bec31445529f805c1a3b43c543 [2021-02-23 17:55:26,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:55:26,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:55:26,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:55:26,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:55:26,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:55:26,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:55:26" (1/1) ... [2021-02-23 17:55:26,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316c11be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:26, skipping insertion in model container [2021-02-23 17:55:26,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:55:26" (1/1) ... [2021-02-23 17:55:26,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:55:26,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:55:27,137 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/id2_i5_o5-2.c[548,561] [2021-02-23 17:55:27,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:55:27,154 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:55:27,176 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/id2_i5_o5-2.c[548,561] [2021-02-23 17:55:27,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:55:27,198 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:55:27,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27 WrapperNode [2021-02-23 17:55:27,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:55:27,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:55:27,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:55:27,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:55:27,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (1/1) ... [2021-02-23 17:55:27,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:55:27,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:55:27,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:55:27,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:55:27,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (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 [2021-02-23 17:55:27,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:55:27,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:55:27,356 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:55:27,356 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-23 17:55:27,357 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-02-23 17:55:27,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:55:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:55:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:55:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:55:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:55:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:55:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-23 17:55:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-02-23 17:55:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:55:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:55:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:55:27,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:55:27,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:55:27,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:55:27,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:55:27,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:55:27,722 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 17:55:27,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:55:27 BoogieIcfgContainer [2021-02-23 17:55:27,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:55:27,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:55:27,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:55:27,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:55:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:55:26" (1/3) ... [2021-02-23 17:55:27,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b832e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:55:27, skipping insertion in model container [2021-02-23 17:55:27,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:55:27" (2/3) ... [2021-02-23 17:55:27,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b832e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:55:27, skipping insertion in model container [2021-02-23 17:55:27,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:55:27" (3/3) ... [2021-02-23 17:55:27,736 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2021-02-23 17:55:27,744 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:55:27,750 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:55:27,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:55:27,799 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:55:27,799 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:55:27,800 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:55:27,800 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:55:27,800 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:55:27,800 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:55:27,800 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:55:27,800 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:55:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-02-23 17:55:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 17:55:27,866 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:27,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:27,868 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1173118509, now seen corresponding path program 1 times [2021-02-23 17:55:27,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:27,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525649096] [2021-02-23 17:55:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:27,997 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:28,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:28,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:28,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:28,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:28,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:28,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:55:28,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525649096] [2021-02-23 17:55:28,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:28,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 17:55:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230137665] [2021-02-23 17:55:28,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 17:55:28,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 17:55:28,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 17:55:28,423 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2021-02-23 17:55:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:28,856 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-02-23 17:55:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 17:55:28,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-23 17:55:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:28,870 INFO L225 Difference]: With dead ends: 55 [2021-02-23 17:55:28,870 INFO L226 Difference]: Without dead ends: 40 [2021-02-23 17:55:28,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:55:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-23 17:55:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-02-23 17:55:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-23 17:55:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-23 17:55:28,935 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2021-02-23 17:55:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:28,935 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-23 17:55:28,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 17:55:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-23 17:55:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 17:55:28,938 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:28,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:28,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:55:28,939 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1864116387, now seen corresponding path program 1 times [2021-02-23 17:55:28,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:28,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155666016] [2021-02-23 17:55:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:28,944 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:28,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:28,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:28,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:28,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:29,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:29,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:29,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:29,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:29,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:29,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:29,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:55:29,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155666016] [2021-02-23 17:55:29,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:29,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 17:55:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867276828] [2021-02-23 17:55:29,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 17:55:29,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 17:55:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 17:55:29,162 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2021-02-23 17:55:29,610 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-23 17:55:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:29,849 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-02-23 17:55:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 17:55:29,851 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-23 17:55:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:29,864 INFO L225 Difference]: With dead ends: 53 [2021-02-23 17:55:29,865 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 17:55:29,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:55:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 17:55:29,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-02-23 17:55:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 17:55:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-02-23 17:55:29,901 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-02-23 17:55:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:29,901 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-02-23 17:55:29,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 17:55:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-02-23 17:55:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-23 17:55:29,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:29,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:29,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:55:29,906 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash -555146259, now seen corresponding path program 1 times [2021-02-23 17:55:29,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:29,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720025661] [2021-02-23 17:55:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:29,914 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:29,985 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:29,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:29,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:29,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:30,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:30,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 17:55:30,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720025661] [2021-02-23 17:55:30,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:30,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 17:55:30,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257096615] [2021-02-23 17:55:30,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 17:55:30,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:30,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 17:55:30,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-02-23 17:55:30,126 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 9 states. [2021-02-23 17:55:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:30,566 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-02-23 17:55:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 17:55:30,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-02-23 17:55:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:30,570 INFO L225 Difference]: With dead ends: 63 [2021-02-23 17:55:30,570 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 17:55:30,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-23 17:55:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 17:55:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-02-23 17:55:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 17:55:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-02-23 17:55:30,589 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2021-02-23 17:55:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:30,590 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-02-23 17:55:30,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 17:55:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-02-23 17:55:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 17:55:30,592 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:30,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:30,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:55:30,593 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:30,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1338353437, now seen corresponding path program 1 times [2021-02-23 17:55:30,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:30,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196298383] [2021-02-23 17:55:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:30,597 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:30,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:30,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:30,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:30,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 17:55:30,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196298383] [2021-02-23 17:55:30,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:30,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 17:55:30,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024861303] [2021-02-23 17:55:30,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 17:55:30,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 17:55:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-23 17:55:30,863 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 10 states. [2021-02-23 17:55:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:31,319 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-02-23 17:55:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 17:55:31,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2021-02-23 17:55:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:31,322 INFO L225 Difference]: With dead ends: 73 [2021-02-23 17:55:31,322 INFO L226 Difference]: Without dead ends: 67 [2021-02-23 17:55:31,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-23 17:55:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-23 17:55:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2021-02-23 17:55:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-23 17:55:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-02-23 17:55:31,340 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2021-02-23 17:55:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:31,341 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-02-23 17:55:31,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 17:55:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-02-23 17:55:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 17:55:31,343 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:31,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:55:31,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:55:31,343 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:31,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:31,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1307231661, now seen corresponding path program 2 times [2021-02-23 17:55:31,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:31,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080661314] [2021-02-23 17:55:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:31,347 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:31,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:31,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:31,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:31,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:31,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-23 17:55:31,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080661314] [2021-02-23 17:55:31,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:31,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 17:55:31,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605539072] [2021-02-23 17:55:31,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 17:55:31,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:31,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 17:55:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-23 17:55:31,566 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2021-02-23 17:55:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:32,042 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-02-23 17:55:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 17:55:32,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2021-02-23 17:55:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:32,045 INFO L225 Difference]: With dead ends: 83 [2021-02-23 17:55:32,045 INFO L226 Difference]: Without dead ends: 77 [2021-02-23 17:55:32,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-02-23 17:55:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-23 17:55:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2021-02-23 17:55:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 17:55:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-23 17:55:32,065 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2021-02-23 17:55:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:32,066 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-23 17:55:32,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 17:55:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-23 17:55:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-23 17:55:32,068 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:32,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 17:55:32,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:55:32,069 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1431419613, now seen corresponding path program 2 times [2021-02-23 17:55:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484538222] [2021-02-23 17:55:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:32,072 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,154 WARN L141 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-02-23 17:55:32,155 WARN L147 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size 7 [2021-02-23 17:55:32,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:32,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 17:55:32,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:32,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:32,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:32,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-02-23 17:55:32,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484538222] [2021-02-23 17:55:32,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:32,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 17:55:32,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984113061] [2021-02-23 17:55:32,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 17:55:32,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 17:55:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-02-23 17:55:32,524 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2021-02-23 17:55:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:33,935 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-02-23 17:55:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-23 17:55:33,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2021-02-23 17:55:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:33,938 INFO L225 Difference]: With dead ends: 93 [2021-02-23 17:55:33,939 INFO L226 Difference]: Without dead ends: 87 [2021-02-23 17:55:33,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-02-23 17:55:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-23 17:55:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-02-23 17:55:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 17:55:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-02-23 17:55:33,962 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 64 [2021-02-23 17:55:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:33,963 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-02-23 17:55:33,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 17:55:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-02-23 17:55:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-02-23 17:55:33,965 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:33,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-02-23 17:55:33,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:55:33,965 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1542865773, now seen corresponding path program 3 times [2021-02-23 17:55:33,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:33,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143955004] [2021-02-23 17:55:33,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:33,968 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:33,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:33,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:33,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:33,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:33,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:34,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:34,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:34,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:34,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-02-23 17:55:34,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143955004] [2021-02-23 17:55:34,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:34,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-23 17:55:34,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605519781] [2021-02-23 17:55:34,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-23 17:55:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-23 17:55:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-23 17:55:34,236 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 13 states. [2021-02-23 17:55:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:34,932 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-02-23 17:55:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-23 17:55:34,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2021-02-23 17:55:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:34,934 INFO L225 Difference]: With dead ends: 103 [2021-02-23 17:55:34,934 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 17:55:34,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-02-23 17:55:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 17:55:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-02-23 17:55:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-23 17:55:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-02-23 17:55:34,976 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 72 [2021-02-23 17:55:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:34,977 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-02-23 17:55:34,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-23 17:55:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-02-23 17:55:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-23 17:55:34,978 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:55:34,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-02-23 17:55:34,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:55:34,979 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:55:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:55:34,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2011491683, now seen corresponding path program 3 times [2021-02-23 17:55:34,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:55:34,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288089674] [2021-02-23 17:55:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:55:34,982 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:55:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:35,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:35,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:55:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:55:35,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 17:55:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 17:55:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:55:35,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:55:35,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:55:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-02-23 17:55:35,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288089674] [2021-02-23 17:55:35,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:55:35,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 17:55:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194214301] [2021-02-23 17:55:35,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 17:55:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:55:35,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 17:55:35,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-02-23 17:55:35,345 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 14 states. [2021-02-23 17:55:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:55:35,968 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-02-23 17:55:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 17:55:35,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2021-02-23 17:55:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:55:35,969 INFO L225 Difference]: With dead ends: 64 [2021-02-23 17:55:35,969 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 17:55:35,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-23 17:55:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 17:55:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 17:55:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 17:55:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 17:55:35,971 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-02-23 17:55:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:55:35,972 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 17:55:35,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 17:55:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 17:55:35,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 17:55:35,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:55:35,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 17:55:36,590 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-02-23 17:55:36,697 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2021-02-23 17:55:37,257 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-02-23 17:55:37,558 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-23 17:55:37,779 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-02-23 17:55:38,098 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-02-23 17:55:38,400 WARN L202 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-02-23 17:55:38,565 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-02-23 17:55:38,887 WARN L202 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-02-23 17:55:39,050 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-02-23 17:55:39,202 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-02-23 17:55:39,353 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2021-02-23 17:55:39,516 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-23 17:55:39,517 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-23 17:55:39,517 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-23 17:55:39,517 INFO L192 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-02-23 17:55:39,517 INFO L192 CegarLoopUtils]: At program point L4-4(line 4) the Hoare annotation is: true [2021-02-23 17:55:39,517 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,517 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,518 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 4) the Hoare annotation is: true [2021-02-23 17:55:39,518 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 17:55:39,518 INFO L192 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: true [2021-02-23 17:55:39,518 INFO L192 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: true [2021-02-23 17:55:39,518 INFO L192 CegarLoopUtils]: At program point L4-2(line 4) the Hoare annotation is: true [2021-02-23 17:55:39,518 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,518 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2021-02-23 17:55:39,519 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2021-02-23 17:55:39,520 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse1 (<= |id2_#in~x| 3)) (.cse0 (= id2_~x |id2_#in~x|))) (or (and (or (and (<= |id2_#in~x| 1) .cse0) (and (<= |id2_#t~ret8| 1) .cse1 (<= 1 |id2_#t~ret8|) .cse0)) (<= 1 |id2_#in~x|)) (and (or .cse1 (and (<= 3 |id2_#t~ret8|) (<= |id2_#t~ret8| 3))) (<= 3 |id2_#in~x|) .cse0) (and (<= 5 |id2_#in~x|) .cse0))) [2021-02-23 17:55:39,521 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (and (= |id2_#in~x| 0) (= id2_~x |id2_#in~x|)) [2021-02-23 17:55:39,521 INFO L185 CegarLoopUtils]: At program point L16-2(line 16) the Hoare annotation is: (let ((.cse1 (<= |id2_#in~x| 3)) (.cse0 (= id2_~x |id2_#in~x|))) (or (and (or (and (<= |id2_#in~x| 1) .cse0) (and (<= |id2_#t~ret8| 1) .cse1 (<= 1 |id2_#t~ret8|) .cse0)) (<= 1 |id2_#in~x|)) (and (or .cse1 (and (<= 3 |id2_#t~ret8|) (<= |id2_#t~ret8| 3))) (<= 3 |id2_#in~x|) .cse0) (and (<= 5 |id2_#in~x|) .cse0))) [2021-02-23 17:55:39,522 INFO L185 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: (let ((.cse1 (<= |id2_#in~x| 3)) (.cse0 (= id2_~x |id2_#in~x|))) (or (and (<= 5 |id2_#in~x|) .cse0) (and (<= 3 |id2_#in~x|) (or .cse1 (and (<= 3 |id2_#t~ret8|) (<= |id2_#t~ret8| 3) (<= |id2_#res| 4) (<= 4 |id2_#res|))) .cse0) (and (or (and (<= |id2_#in~x| 1) .cse0) (and (<= 2 |id2_#res|) (<= |id2_#t~ret8| 1) .cse1 (<= 1 |id2_#t~ret8|) (<= |id2_#res| 2) .cse0)) (<= 1 |id2_#in~x|)))) [2021-02-23 17:55:39,522 INFO L185 CegarLoopUtils]: At program point id2EXIT(lines 14 17) the Hoare annotation is: (let ((.cse1 (<= |id2_#in~x| 3)) (.cse0 (= id2_~x |id2_#in~x|))) (or (and (<= 3 |id2_#in~x|) (or (and (<= |id2_#res| 4) .cse0 (<= 4 |id2_#res|)) (and .cse1 .cse0))) (and (= |id2_#in~x| 0) (= |id2_#res| 0) .cse0) (and (or (and (<= 2 |id2_#res|) .cse1 (<= |id2_#res| 2)) (<= |id2_#in~x| 1)) (<= 1 |id2_#in~x|) .cse0) (and (<= 5 |id2_#in~x|) .cse0))) [2021-02-23 17:55:39,522 INFO L192 CegarLoopUtils]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2021-02-23 17:55:39,522 INFO L185 CegarLoopUtils]: At program point id2FINAL(lines 14 17) the Hoare annotation is: (let ((.cse1 (<= |id2_#in~x| 3)) (.cse0 (= id2_~x |id2_#in~x|))) (or (and (<= 3 |id2_#in~x|) (or (and (<= |id2_#res| 4) .cse0 (<= 4 |id2_#res|)) (and .cse1 .cse0))) (and (= |id2_#in~x| 0) (= |id2_#res| 0) .cse0) (and (or (and (<= 2 |id2_#res|) .cse1 (<= |id2_#res| 2)) (<= |id2_#in~x| 1)) (<= 1 |id2_#in~x|) .cse0) (and (<= 5 |id2_#in~x|) .cse0))) [2021-02-23 17:55:39,522 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,522 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,522 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,523 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 17:55:39,523 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 23) the Hoare annotation is: false [2021-02-23 17:55:39,523 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 19 25) the Hoare annotation is: true [2021-02-23 17:55:39,523 INFO L185 CegarLoopUtils]: At program point mainEXIT(lines 19 25) the Hoare annotation is: (<= 5 main_~input~0) [2021-02-23 17:55:39,523 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: false [2021-02-23 17:55:39,523 INFO L185 CegarLoopUtils]: At program point L22(lines 22 24) the Hoare annotation is: (and (< 4 main_~result~0) (<= 5 main_~input~0) (<= main_~result~0 5)) [2021-02-23 17:55:39,524 INFO L185 CegarLoopUtils]: At program point L23-1(line 23) the Hoare annotation is: false [2021-02-23 17:55:39,524 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2021-02-23 17:55:39,524 INFO L185 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 5 |main_#t~ret9|) (<= |main_#t~ret9| 5) (<= 5 main_~input~0)) [2021-02-23 17:55:39,524 INFO L185 CegarLoopUtils]: At program point L22-2(lines 19 25) the Hoare annotation is: (<= 5 main_~input~0) [2021-02-23 17:55:39,524 INFO L185 CegarLoopUtils]: At program point L21-2(line 21) the Hoare annotation is: (and (<= 5 |main_#t~ret9|) (<= |main_#t~ret9| 5) (<= 5 main_~input~0)) [2021-02-23 17:55:39,525 INFO L185 CegarLoopUtils]: At program point L21-3(line 21) the Hoare annotation is: (and (<= 5 |main_#t~ret9|) (<= |main_#t~ret9| 5) (< 4 main_~result~0) (<= 5 main_~input~0) (<= main_~result~0 5)) [2021-02-23 17:55:39,525 INFO L185 CegarLoopUtils]: At program point idFINAL(lines 9 12) the Hoare annotation is: (let ((.cse1 (<= |id_#in~x| 2)) (.cse2 (= |id_#in~x| id_~x)) (.cse0 (<= |id_#in~x| 4))) (or (and (or (and (<= |id_#res| 3) .cse0 (<= 3 |id_#res|)) .cse1) .cse2 (<= 2 |id_#in~x|)) (and .cse2 (<= 6 |id_#in~x|)) (and (<= 1 |id_#in~x|) .cse2 (<= |id_#res| 1) (<= 1 |id_#res|) .cse1) (and .cse2 (= |id_#in~x| 0)) (and (<= 4 |id_#in~x|) (or (and (<= 5 |id_#res|) .cse2 (<= |id_#res| 5)) (and .cse2 .cse0))))) [2021-02-23 17:55:39,525 INFO L185 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-02-23 17:55:39,525 INFO L185 CegarLoopUtils]: At program point idEXIT(lines 9 12) the Hoare annotation is: (let ((.cse1 (<= |id_#in~x| 2)) (.cse2 (= |id_#in~x| id_~x)) (.cse0 (<= |id_#in~x| 4))) (or (and (or (and (<= |id_#res| 3) .cse0 (<= 3 |id_#res|)) .cse1) .cse2 (<= 2 |id_#in~x|)) (and .cse2 (<= 6 |id_#in~x|)) (and (<= 1 |id_#in~x|) .cse2 (<= |id_#res| 1) (<= 1 |id_#res|) .cse1) (and .cse2 (= |id_#in~x| 0)) (and (<= 4 |id_#in~x|) (or (and (<= 5 |id_#res|) .cse2 (<= |id_#res| 5)) (and .cse2 .cse0))))) [2021-02-23 17:55:39,525 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-02-23 17:55:39,526 INFO L185 CegarLoopUtils]: At program point L11-1(line 11) the Hoare annotation is: (let ((.cse0 (= |id_#in~x| id_~x)) (.cse1 (<= |id_#in~x| 4))) (or (and .cse0 (<= 6 |id_#in~x|)) (and (<= 1 |id_#in~x|) .cse0 (= |id_#t~ret7| 0) (<= |id_#in~x| 1)) (and (or (and .cse0 (<= |id_#in~x| 2)) (and .cse0 .cse1 (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|))) (<= 2 |id_#in~x|)) (and (or (and .cse0 (<= 4 |id_#t~ret7|) (<= |id_#t~ret7| 4)) (and .cse0 .cse1)) (<= 4 |id_#in~x|)))) [2021-02-23 17:55:39,526 INFO L185 CegarLoopUtils]: At program point L10-1(line 10) the Hoare annotation is: (and (= |id_#in~x| id_~x) (= |id_#in~x| 0)) [2021-02-23 17:55:39,526 INFO L185 CegarLoopUtils]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse0 (= |id_#in~x| id_~x)) (.cse1 (<= |id_#in~x| 4))) (or (and .cse0 (<= 6 |id_#in~x|)) (and (<= 1 |id_#in~x|) .cse0 (= |id_#t~ret7| 0) (<= |id_#in~x| 1)) (and (or (and .cse0 (<= |id_#in~x| 2)) (and .cse0 .cse1 (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|))) (<= 2 |id_#in~x|)) (and (or (and .cse0 (<= 4 |id_#t~ret7|) (<= |id_#t~ret7| 4)) (and .cse0 .cse1)) (<= 4 |id_#in~x|)))) [2021-02-23 17:55:39,526 INFO L185 CegarLoopUtils]: At program point L11-3(line 11) the Hoare annotation is: (and (or (and (or (and (<= |id_#res| 3) (<= |id_#t~ret7| 2) (<= 2 |id_#t~ret7|) (<= 3 |id_#res|)) (<= |id_#in~x| 2)) (<= 2 |id_#in~x|)) (and (<= 1 |id_#in~x|) (<= |id_#res| 1) (= |id_#t~ret7| 0) (<= 1 |id_#res|) (<= |id_#in~x| 1)) (<= 4 |id_#in~x|)) (let ((.cse0 (= |id_#in~x| id_~x))) (or (and (<= 5 |id_#res|) .cse0 (<= |id_#res| 5) (<= 4 |id_#t~ret7|) (<= |id_#t~ret7| 4)) (and .cse0 (<= 6 |id_#in~x|)) (and .cse0 (<= |id_#in~x| 4))))) [2021-02-23 17:55:39,526 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2021-02-23 17:55:39,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:55:39 BoogieIcfgContainer [2021-02-23 17:55:39,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 17:55:39,567 INFO L168 Benchmark]: Toolchain (without parser) took 12670.40 ms. Allocated memory was 151.0 MB in the beginning and 275.8 MB in the end (delta: 124.8 MB). Free memory was 126.0 MB in the beginning and 114.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 152.6 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:39,567 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 17:55:39,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:39,568 INFO L168 Benchmark]: Boogie Preprocessor took 37.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:39,568 INFO L168 Benchmark]: RCFGBuilder took 485.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 99.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:39,569 INFO L168 Benchmark]: TraceAbstraction took 11839.18 ms. Allocated memory was 151.0 MB in the beginning and 275.8 MB in the end (delta: 124.8 MB). Free memory was 99.2 MB in the beginning and 114.2 MB in the end (delta: -15.0 MB). Peak memory consumption was 126.4 MB. Max. memory is 8.0 GB. [2021-02-23 17:55:39,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 114.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 485.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 99.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11839.18 ms. Allocated memory was 151.0 MB in the beginning and 275.8 MB in the end (delta: 124.8 MB). Free memory was 99.2 MB in the beginning and 114.2 MB in the end (delta: -15.0 MB). Peak memory consumption was 126.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 23]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for id2 Derived contract for procedure id2: (((3 <= \old(x) && (((\result <= 4 && x == \old(x)) && 4 <= \result) || (\old(x) <= 3 && x == \old(x)))) || ((\old(x) == 0 && \result == 0) && x == \old(x))) || (((((2 <= \result && \old(x) <= 3) && \result <= 2) || \old(x) <= 1) && 1 <= \old(x)) && x == \old(x))) || (5 <= \old(x) && x == \old(x)) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 5 <= input - ProcedureContractResult [Line: 9]: Procedure Contract for id Derived contract for procedure id: ((((((((\result <= 3 && \old(x) <= 4) && 3 <= \result) || \old(x) <= 2) && \old(x) == x) && 2 <= \old(x)) || (\old(x) == x && 6 <= \old(x))) || ((((1 <= \old(x) && \old(x) == x) && \result <= 1) && 1 <= \result) && \old(x) <= 2)) || (\old(x) == x && \old(x) == 0)) || (4 <= \old(x) && (((5 <= \result && \old(x) == x) && \result <= 5) || (\old(x) == x && \old(x) <= 4))) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.1s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 400 SDslu, 801 SDs, 0 SdLazy, 1957 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 60 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 43 LocationsWithAnnotation, 52 PreInvPairs, 252 NumberOfFragments, 779 HoareAnnotationTreeSize, 52 FomulaSimplifications, 59532 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 43 FomulaSimplificationsInter, 7171 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, 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 correct! Received shutdown request...