/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/id_i15_o15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:28:22,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:28:22,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:28:22,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:28:22,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:28:22,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:28:22,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:28:22,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:28:22,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:28:22,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:28:22,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:28:22,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:28:22,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:28:22,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:28:22,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:28:22,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:28:22,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:28:22,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:28:22,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:28:22,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:28:22,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:28:22,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:28:22,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:28:22,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:28:22,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:28:22,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:28:22,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:28:22,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:28:22,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:28:22,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:28:22,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:28:22,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:28:22,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:28:22,249 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:28:22,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:28:22,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:28:22,250 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:28:22,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:28:22,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:28:22,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:28:22,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:28:22,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:28:22,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:28:22,252 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:28:22,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:28:22,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:28:22,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:28:22,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:28:22,765 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:28:22,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2021-02-21 20:28:22,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e835af465/30a2ac9fee484c278146276f595e7202/FLAG83c491116 [2021-02-21 20:28:23,407 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:28:23,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2021-02-21 20:28:23,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e835af465/30a2ac9fee484c278146276f595e7202/FLAG83c491116 [2021-02-21 20:28:23,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e835af465/30a2ac9fee484c278146276f595e7202 [2021-02-21 20:28:23,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:28:23,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:28:23,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:28:23,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:28:23,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:28:23,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:28:23" (1/1) ... [2021-02-21 20:28:23,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ea2bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:23, skipping insertion in model container [2021-02-21 20:28:23,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:28:23" (1/1) ... [2021-02-21 20:28:23,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:28:23,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:28:24,006 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c[454,467] [2021-02-21 20:28:24,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:28:24,020 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:28:24,036 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c[454,467] [2021-02-21 20:28:24,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:28:24,053 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:28:24,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24 WrapperNode [2021-02-21 20:28:24,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:28:24,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:28:24,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:28:24,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:28:24,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,076 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... [2021-02-21 20:28:24,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:28:24,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:28:24,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:28:24,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:28:24,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:28:24,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:28:24,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:28:24,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:28:24,205 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-21 20:28:24,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:28:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:28:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:28:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:28:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:28:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:28:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-21 20:28:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:28:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:28:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:28:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:28:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:28:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:28:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:28:24,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:28:24,590 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:28:24,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:28:24 BoogieIcfgContainer [2021-02-21 20:28:24,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:28:24,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:28:24,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:28:24,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:28:24,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:28:23" (1/3) ... [2021-02-21 20:28:24,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626cc3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:28:24, skipping insertion in model container [2021-02-21 20:28:24,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:28:24" (2/3) ... [2021-02-21 20:28:24,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626cc3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:28:24, skipping insertion in model container [2021-02-21 20:28:24,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:28:24" (3/3) ... [2021-02-21 20:28:24,601 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2021-02-21 20:28:24,608 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:28:24,613 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:28:24,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:28:24,662 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:28:24,663 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:28:24,663 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:28:24,663 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:28:24,663 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:28:24,663 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:28:24,663 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:28:24,664 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:28:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-21 20:28:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 20:28:24,726 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:24,727 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] [2021-02-21 20:28:24,728 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -777358502, now seen corresponding path program 1 times [2021-02-21 20:28:24,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:24,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775948834] [2021-02-21 20:28:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:24,836 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:24,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:24,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:24,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:24,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:25,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:25,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:25,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:28:25,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775948834] [2021-02-21 20:28:25,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:25,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:28:25,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404018267] [2021-02-21 20:28:25,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:28:25,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:25,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:28:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:28:25,266 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2021-02-21 20:28:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:25,509 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-02-21 20:28:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:28:25,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-02-21 20:28:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:25,522 INFO L225 Difference]: With dead ends: 46 [2021-02-21 20:28:25,522 INFO L226 Difference]: Without dead ends: 31 [2021-02-21 20:28:25,526 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 [2021-02-21 20:28:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-21 20:28:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-21 20:28:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-21 20:28:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-02-21 20:28:25,593 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 24 [2021-02-21 20:28:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:25,594 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-02-21 20:28:25,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:28:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-02-21 20:28:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 20:28:25,596 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:25,597 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] [2021-02-21 20:28:25,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:28:25,597 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash 814440848, now seen corresponding path program 1 times [2021-02-21 20:28:25,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:25,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137571558] [2021-02-21 20:28:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:25,602 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:25,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:25,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:25,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:25,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:25,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:25,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:25,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-21 20:28:25,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137571558] [2021-02-21 20:28:25,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:25,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:28:25,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023461254] [2021-02-21 20:28:25,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:28:25,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:28:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:28:25,773 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2021-02-21 20:28:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:26,014 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-02-21 20:28:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:28:26,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-02-21 20:28:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:26,016 INFO L225 Difference]: With dead ends: 42 [2021-02-21 20:28:26,016 INFO L226 Difference]: Without dead ends: 36 [2021-02-21 20:28:26,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:28:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-21 20:28:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-02-21 20:28:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-21 20:28:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-02-21 20:28:26,033 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-02-21 20:28:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:26,034 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-02-21 20:28:26,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:28:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-02-21 20:28:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-21 20:28:26,035 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:26,036 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 20:28:26,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:28:26,036 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash -545888486, now seen corresponding path program 2 times [2021-02-21 20:28:26,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:26,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234608705] [2021-02-21 20:28:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:26,040 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:26,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:26,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-21 20:28:26,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234608705] [2021-02-21 20:28:26,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:26,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:28:26,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283609900] [2021-02-21 20:28:26,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:28:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:28:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:28:26,218 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2021-02-21 20:28:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:26,500 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-02-21 20:28:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:28:26,501 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2021-02-21 20:28:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:26,503 INFO L225 Difference]: With dead ends: 47 [2021-02-21 20:28:26,503 INFO L226 Difference]: Without dead ends: 41 [2021-02-21 20:28:26,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:28:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-21 20:28:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-02-21 20:28:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-21 20:28:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-02-21 20:28:26,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2021-02-21 20:28:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:26,519 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-02-21 20:28:26,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:28:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-02-21 20:28:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-21 20:28:26,521 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:26,521 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-21 20:28:26,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:28:26,522 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:26,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1925368272, now seen corresponding path program 3 times [2021-02-21 20:28:26,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:26,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167657341] [2021-02-21 20:28:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:26,526 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:26,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:26,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:26,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:26,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:26,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-02-21 20:28:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167657341] [2021-02-21 20:28:26,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:26,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:28:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360037110] [2021-02-21 20:28:26,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:28:26,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:28:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:28:26,793 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 9 states. [2021-02-21 20:28:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:27,093 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-02-21 20:28:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:28:27,094 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2021-02-21 20:28:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:27,096 INFO L225 Difference]: With dead ends: 52 [2021-02-21 20:28:27,096 INFO L226 Difference]: Without dead ends: 46 [2021-02-21 20:28:27,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:28:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-21 20:28:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-02-21 20:28:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-21 20:28:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-02-21 20:28:27,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 48 [2021-02-21 20:28:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:27,112 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-02-21 20:28:27,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:28:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-02-21 20:28:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-21 20:28:27,114 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:27,115 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:27,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:28:27,115 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:27,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1702046426, now seen corresponding path program 4 times [2021-02-21 20:28:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:27,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150179047] [2021-02-21 20:28:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:27,119 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,151 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:27,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:27,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-02-21 20:28:27,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150179047] [2021-02-21 20:28:27,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:27,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-21 20:28:27,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935038412] [2021-02-21 20:28:27,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 20:28:27,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:27,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 20:28:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-21 20:28:27,373 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 10 states. [2021-02-21 20:28:27,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:27,735 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-02-21 20:28:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 20:28:27,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-02-21 20:28:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:27,738 INFO L225 Difference]: With dead ends: 57 [2021-02-21 20:28:27,738 INFO L226 Difference]: Without dead ends: 51 [2021-02-21 20:28:27,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:28:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-21 20:28:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-02-21 20:28:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-21 20:28:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-02-21 20:28:27,751 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 56 [2021-02-21 20:28:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:27,752 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-02-21 20:28:27,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 20:28:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-02-21 20:28:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-21 20:28:27,753 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:27,753 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:27,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:28:27,754 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:27,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1874632176, now seen corresponding path program 5 times [2021-02-21 20:28:27,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:27,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684302357] [2021-02-21 20:28:27,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:27,757 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:27,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:27,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:27,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:27,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:27,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-02-21 20:28:27,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684302357] [2021-02-21 20:28:27,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:27,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:28:27,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111146363] [2021-02-21 20:28:27,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:28:27,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:28:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:28:27,991 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2021-02-21 20:28:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:28,381 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-02-21 20:28:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:28:28,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2021-02-21 20:28:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:28,387 INFO L225 Difference]: With dead ends: 62 [2021-02-21 20:28:28,387 INFO L226 Difference]: Without dead ends: 56 [2021-02-21 20:28:28,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:28:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-21 20:28:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-02-21 20:28:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-21 20:28:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-02-21 20:28:28,403 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 64 [2021-02-21 20:28:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:28,403 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-02-21 20:28:28,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:28:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-02-21 20:28:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-02-21 20:28:28,405 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:28,405 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:28,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:28:28,405 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1809628826, now seen corresponding path program 6 times [2021-02-21 20:28:28,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:28,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19950256] [2021-02-21 20:28:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:28,409 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:28,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:28,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:28,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:28,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:28,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-02-21 20:28:28,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19950256] [2021-02-21 20:28:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:28:28,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573851656] [2021-02-21 20:28:28,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:28:28,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:28:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:28:28,737 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states. [2021-02-21 20:28:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:29,150 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-02-21 20:28:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-21 20:28:29,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2021-02-21 20:28:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:29,159 INFO L225 Difference]: With dead ends: 67 [2021-02-21 20:28:29,159 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 20:28:29,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-02-21 20:28:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 20:28:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-02-21 20:28:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-02-21 20:28:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-02-21 20:28:29,190 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 72 [2021-02-21 20:28:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:29,191 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-02-21 20:28:29,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:28:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-02-21 20:28:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-21 20:28:29,193 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:29,195 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:29,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:28:29,195 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1448159824, now seen corresponding path program 7 times [2021-02-21 20:28:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:29,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621240650] [2021-02-21 20:28:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:29,199 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:29,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:29,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:29,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:29,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:29,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-02-21 20:28:29,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621240650] [2021-02-21 20:28:29,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:29,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-02-21 20:28:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168750215] [2021-02-21 20:28:29,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-21 20:28:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-21 20:28:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:28:29,603 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 13 states. [2021-02-21 20:28:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:30,067 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-02-21 20:28:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 20:28:30,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-21 20:28:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:30,069 INFO L225 Difference]: With dead ends: 72 [2021-02-21 20:28:30,070 INFO L226 Difference]: Without dead ends: 66 [2021-02-21 20:28:30,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-02-21 20:28:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-21 20:28:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-02-21 20:28:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-02-21 20:28:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-02-21 20:28:30,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 80 [2021-02-21 20:28:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:30,086 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-02-21 20:28:30,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-21 20:28:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-02-21 20:28:30,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-21 20:28:30,087 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:30,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:30,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:28:30,088 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:30,088 INFO L82 PathProgramCache]: Analyzing trace with hash -537976230, now seen corresponding path program 8 times [2021-02-21 20:28:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:30,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691780135] [2021-02-21 20:28:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:30,091 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:30,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:30,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,169 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:30,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-02-21 20:28:30,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691780135] [2021-02-21 20:28:30,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:30,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:28:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382625338] [2021-02-21 20:28:30,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:28:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:30,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:28:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:28:30,425 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 14 states. [2021-02-21 20:28:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:30,915 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-02-21 20:28:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-21 20:28:30,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2021-02-21 20:28:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:30,917 INFO L225 Difference]: With dead ends: 77 [2021-02-21 20:28:30,918 INFO L226 Difference]: Without dead ends: 71 [2021-02-21 20:28:30,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-02-21 20:28:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-21 20:28:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-02-21 20:28:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 20:28:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-02-21 20:28:30,933 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 88 [2021-02-21 20:28:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:30,934 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-02-21 20:28:30,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:28:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-02-21 20:28:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-21 20:28:30,935 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:30,936 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:30,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:28:30,936 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:30,936 INFO L82 PathProgramCache]: Analyzing trace with hash -852483440, now seen corresponding path program 9 times [2021-02-21 20:28:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:30,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3147257] [2021-02-21 20:28:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:30,939 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:30,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:30,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:30,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:30,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:31,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:31,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-02-21 20:28:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3147257] [2021-02-21 20:28:31,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:31,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 20:28:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050704771] [2021-02-21 20:28:31,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 20:28:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 20:28:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:28:31,354 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 15 states. [2021-02-21 20:28:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:31,900 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-02-21 20:28:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:28:31,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2021-02-21 20:28:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:31,902 INFO L225 Difference]: With dead ends: 82 [2021-02-21 20:28:31,902 INFO L226 Difference]: Without dead ends: 76 [2021-02-21 20:28:31,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-02-21 20:28:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-21 20:28:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-21 20:28:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-21 20:28:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-02-21 20:28:31,917 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 96 [2021-02-21 20:28:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:31,918 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-02-21 20:28:31,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 20:28:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-02-21 20:28:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-02-21 20:28:31,919 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:31,920 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:31,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:28:31,920 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:31,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1407604250, now seen corresponding path program 10 times [2021-02-21 20:28:31,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:31,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317837450] [2021-02-21 20:28:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:31,923 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:31,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:31,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:31,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:31,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:31,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:31,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,116 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-02-21 20:28:32,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317837450] [2021-02-21 20:28:32,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:32,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 20:28:32,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488542144] [2021-02-21 20:28:32,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 20:28:32,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 20:28:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:28:32,337 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 16 states. [2021-02-21 20:28:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:32,924 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2021-02-21 20:28:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 20:28:32,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2021-02-21 20:28:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:32,925 INFO L225 Difference]: With dead ends: 87 [2021-02-21 20:28:32,925 INFO L226 Difference]: Without dead ends: 81 [2021-02-21 20:28:32,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-02-21 20:28:32,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-21 20:28:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-02-21 20:28:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-21 20:28:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-02-21 20:28:32,940 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 104 [2021-02-21 20:28:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:32,941 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-02-21 20:28:32,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 20:28:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-02-21 20:28:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-02-21 20:28:32,942 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:32,942 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:32,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 20:28:32,942 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2015644368, now seen corresponding path program 11 times [2021-02-21 20:28:32,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:32,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665900397] [2021-02-21 20:28:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:32,945 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:32,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:32,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:32,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:32,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:33,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:33,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:33,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:33,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-02-21 20:28:33,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665900397] [2021-02-21 20:28:33,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 20:28:33,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998330292] [2021-02-21 20:28:33,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 20:28:33,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:33,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 20:28:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-02-21 20:28:33,450 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 17 states. [2021-02-21 20:28:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:34,161 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-02-21 20:28:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-21 20:28:34,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2021-02-21 20:28:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:34,164 INFO L225 Difference]: With dead ends: 92 [2021-02-21 20:28:34,164 INFO L226 Difference]: Without dead ends: 86 [2021-02-21 20:28:34,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2021-02-21 20:28:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-21 20:28:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-02-21 20:28:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 20:28:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-02-21 20:28:34,189 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 112 [2021-02-21 20:28:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:34,189 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-02-21 20:28:34,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 20:28:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-02-21 20:28:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-02-21 20:28:34,194 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:34,195 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:34,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 20:28:34,195 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1090627110, now seen corresponding path program 12 times [2021-02-21 20:28:34,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:34,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506040904] [2021-02-21 20:28:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:34,200 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:34,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:34,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,627 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:34,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:34,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-02-21 20:28:34,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506040904] [2021-02-21 20:28:34,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:34,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-02-21 20:28:34,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637201127] [2021-02-21 20:28:34,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-21 20:28:34,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:34,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-21 20:28:34,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-02-21 20:28:34,916 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 18 states. [2021-02-21 20:28:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:35,643 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-02-21 20:28:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-21 20:28:35,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2021-02-21 20:28:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:35,645 INFO L225 Difference]: With dead ends: 97 [2021-02-21 20:28:35,646 INFO L226 Difference]: Without dead ends: 91 [2021-02-21 20:28:35,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=703, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 20:28:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-21 20:28:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-02-21 20:28:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-21 20:28:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-02-21 20:28:35,664 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 120 [2021-02-21 20:28:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:35,664 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-02-21 20:28:35,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-02-21 20:28:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-02-21 20:28:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-02-21 20:28:35,666 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:35,666 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:35,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 20:28:35,667 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1787714800, now seen corresponding path program 13 times [2021-02-21 20:28:35,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:35,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754990082] [2021-02-21 20:28:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:35,670 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:35,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:35,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:35,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,899 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:35,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:35,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:35,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:36,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:36,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-02-21 20:28:36,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754990082] [2021-02-21 20:28:36,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:36,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-21 20:28:36,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138877229] [2021-02-21 20:28:36,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-21 20:28:36,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-21 20:28:36,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:28:36,412 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 19 states. [2021-02-21 20:28:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:37,216 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2021-02-21 20:28:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 20:28:37,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2021-02-21 20:28:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:37,219 INFO L225 Difference]: With dead ends: 102 [2021-02-21 20:28:37,219 INFO L226 Difference]: Without dead ends: 96 [2021-02-21 20:28:37,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-02-21 20:28:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-21 20:28:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-02-21 20:28:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-02-21 20:28:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-02-21 20:28:37,236 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 128 [2021-02-21 20:28:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:37,237 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-02-21 20:28:37,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-21 20:28:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-02-21 20:28:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-02-21 20:28:37,239 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:37,239 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:37,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 20:28:37,239 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1030958490, now seen corresponding path program 14 times [2021-02-21 20:28:37,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:37,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325182290] [2021-02-21 20:28:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:37,242 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:37,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:37,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:28:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:28:37,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-21 20:28:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:28:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:28:37,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:28:37,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:28:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-02-21 20:28:37,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325182290] [2021-02-21 20:28:37,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:28:37,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-21 20:28:37,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086832837] [2021-02-21 20:28:37,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-21 20:28:37,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:28:37,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-21 20:28:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-02-21 20:28:37,895 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 20 states. [2021-02-21 20:28:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:28:38,749 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2021-02-21 20:28:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-21 20:28:38,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2021-02-21 20:28:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:28:38,751 INFO L225 Difference]: With dead ends: 107 [2021-02-21 20:28:38,751 INFO L226 Difference]: Without dead ends: 101 [2021-02-21 20:28:38,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-02-21 20:28:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-21 20:28:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-02-21 20:28:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-02-21 20:28:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-02-21 20:28:38,774 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 136 [2021-02-21 20:28:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:28:38,775 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-02-21 20:28:38,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-21 20:28:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-02-21 20:28:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-02-21 20:28:38,777 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:28:38,777 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:28:38,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 20:28:38,777 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:28:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:28:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1583098704, now seen corresponding path program 15 times [2021-02-21 20:28:38,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:28:38,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646974943] [2021-02-21 20:28:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:28:38,781 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:28:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:28:38,802 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:28:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:28:38,825 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:28:38,873 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:28:38,873 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:28:38,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 20:28:38,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:28:38 BoogieIcfgContainer [2021-02-21 20:28:38,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:28:38,899 INFO L168 Benchmark]: Toolchain (without parser) took 15080.03 ms. Allocated memory was 153.1 MB in the beginning and 404.8 MB in the end (delta: 251.7 MB). Free memory was 129.3 MB in the beginning and 363.3 MB in the end (delta: -234.1 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2021-02-21 20:28:38,900 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:28:38,900 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.14 ms. Allocated memory is still 153.1 MB. Free memory was 128.2 MB in the beginning and 119.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:28:38,900 INFO L168 Benchmark]: Boogie Preprocessor took 32.29 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:28:38,900 INFO L168 Benchmark]: RCFGBuilder took 504.00 ms. Allocated memory is still 153.1 MB. Free memory was 117.7 MB in the beginning and 104.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:28:38,900 INFO L168 Benchmark]: TraceAbstraction took 14304.42 ms. Allocated memory was 153.1 MB in the beginning and 404.8 MB in the end (delta: 251.7 MB). Free memory was 103.9 MB in the beginning and 363.3 MB in the end (delta: -259.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:28:38,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.14 ms. Allocated memory is still 153.1 MB. Free memory was 128.2 MB in the beginning and 119.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.29 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 504.00 ms. Allocated memory is still 153.1 MB. Free memory was 117.7 MB in the beginning and 104.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 14304.42 ms. Allocated memory was 153.1 MB in the beginning and 404.8 MB in the end (delta: 251.7 MB). Free memory was 103.9 MB in the beginning and 363.3 MB in the end (delta: -259.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 15; [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 15 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.2s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 394 SDtfs, 1288 SDslu, 871 SDs, 0 SdLazy, 1462 SolverSat, 383 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 585 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...