/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:37:14,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:37:14,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:37:14,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:37:14,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:37:14,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:37:14,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:37:14,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:37:14,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:37:14,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:37:14,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:37:14,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:37:14,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:37:14,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:37:14,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:37:14,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:37:14,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:37:14,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:37:14,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:37:14,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:37:14,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:37:14,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:37:14,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:37:14,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:37:14,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:37:14,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:37:14,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:37:14,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:37:14,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:37:14,312 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:37:14,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:37:14,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:37:14,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:37:14,314 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:37:14,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:37:14,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:37:14,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:37:14,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:37:14,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:37:14,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:37:14,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:37:14,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:37:14,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:37:14,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:37:14,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:37:14,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:37:14,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:37:14,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:37:14,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:37:14,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:37:14,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:37:14,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:37:14,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:37:14,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:37:14,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:37:14,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:37:14,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:37:14,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:37:14,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:37:14,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:37:14,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:37:14,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:37:14,711 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:37:14,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2021-02-19 17:37:14,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4bac3516/2a5656da5dd14eb5b8112915df42b71c/FLAGb221746c2 [2021-02-19 17:37:15,308 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:37:15,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2021-02-19 17:37:15,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4bac3516/2a5656da5dd14eb5b8112915df42b71c/FLAGb221746c2 [2021-02-19 17:37:15,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4bac3516/2a5656da5dd14eb5b8112915df42b71c [2021-02-19 17:37:15,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:37:15,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:37:15,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:37:15,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:37:15,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:37:15,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa261c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15, skipping insertion in model container [2021-02-19 17:37:15,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:37:15,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:37:15,874 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_b5_o10-2.c[530,543] [2021-02-19 17:37:15,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:37:15,888 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:37:15,904 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_b5_o10-2.c[530,543] [2021-02-19 17:37:15,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:37:15,921 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:37:15,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15 WrapperNode [2021-02-19 17:37:15,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:37:15,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:37:15,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:37:15,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:37:15,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... [2021-02-19 17:37:15,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:37:15,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:37:15,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:37:15,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:37:15,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:37:16,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:37:16,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:37:16,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:37:16,066 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-19 17:37:16,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:37:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:37:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:37:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:37:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:37:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:37:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-19 17:37:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:37:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:37:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:37:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:37:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:37:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:37:16,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:37:16,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:37:16,370 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:37:16,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:37:16 BoogieIcfgContainer [2021-02-19 17:37:16,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:37:16,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:37:16,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:37:16,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:37:16,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:37:15" (1/3) ... [2021-02-19 17:37:16,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8c5870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:37:16, skipping insertion in model container [2021-02-19 17:37:16,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:37:15" (2/3) ... [2021-02-19 17:37:16,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d8c5870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:37:16, skipping insertion in model container [2021-02-19 17:37:16,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:37:16" (3/3) ... [2021-02-19 17:37:16,416 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2021-02-19 17:37:16,425 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:37:16,430 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:37:16,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:37:16,517 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:37:16,517 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:37:16,518 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:37:16,518 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:37:16,518 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:37:16,518 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:37:16,519 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:37:16,519 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:37:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-02-19 17:37:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:37:16,572 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:37:16,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:16,582 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:37:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash -211895392, now seen corresponding path program 1 times [2021-02-19 17:37:16,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:16,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948965086] [2021-02-19 17:37:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:16,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:16,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:16,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:16,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:16,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:37:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:16,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:16,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:37:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:16,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:16,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:16,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:16,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948965086] [2021-02-19 17:37:16,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:37:16,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 17:37:16,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810651663] [2021-02-19 17:37:16,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:37:16,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:17,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:37:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:37:17,009 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2021-02-19 17:37:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:17,387 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-02-19 17:37:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:37:17,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-19 17:37:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:17,405 INFO L225 Difference]: With dead ends: 34 [2021-02-19 17:37:17,405 INFO L226 Difference]: Without dead ends: 20 [2021-02-19 17:37:17,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-19 17:37:17,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-19 17:37:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-19 17:37:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-02-19 17:37:17,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2021-02-19 17:37:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:17,481 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-02-19 17:37:17,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 17:37:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-02-19 17:37:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:37:17,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:37:17,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:17,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:37:17,486 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:37:17,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:17,489 INFO L82 PathProgramCache]: Analyzing trace with hash -351670379, now seen corresponding path program 1 times [2021-02-19 17:37:17,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:17,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009180850] [2021-02-19 17:37:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:17,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:17,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:17,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:37:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:17,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:17,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:37:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:17,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:17,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:17,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:17,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:17,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-19 17:37:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:17,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:17,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:17,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:37:17,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009180850] [2021-02-19 17:37:17,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:37:17,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 17:37:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344305617] [2021-02-19 17:37:17,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:37:17,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:37:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:37:17,780 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-02-19 17:37:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:18,022 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-02-19 17:37:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:37:18,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-19 17:37:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:18,025 INFO L225 Difference]: With dead ends: 32 [2021-02-19 17:37:18,026 INFO L226 Difference]: Without dead ends: 24 [2021-02-19 17:37:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-19 17:37:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-02-19 17:37:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-19 17:37:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-02-19 17:37:18,044 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 21 [2021-02-19 17:37:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:18,045 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-02-19 17:37:18,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 17:37:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-02-19 17:37:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:37:18,046 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:37:18,047 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:18,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:37:18,049 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:37:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash -323041228, now seen corresponding path program 1 times [2021-02-19 17:37:18,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:18,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987912920] [2021-02-19 17:37:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:18,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:37:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:18,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:37:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:18,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-19 17:37:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:18,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:37:18,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987912920] [2021-02-19 17:37:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626392549] [2021-02-19 17:37:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:18,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,367 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,406 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,457 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 17:37:18,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 17:37:18,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 17:37:18,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 17:37:18,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 17:37:18,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,497 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,501 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-19 17:37:18,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:37:18,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 17:37:18,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:18,513 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-19 17:37:18,514 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-19 17:37:18,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:18,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:37:18,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:18,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-02-19 17:37:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855621881] [2021-02-19 17:37:18,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:18,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:18,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:18,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:18,521 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 10 states. [2021-02-19 17:37:18,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:18,816 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-02-19 17:37:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:37:18,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2021-02-19 17:37:18,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:18,818 INFO L225 Difference]: With dead ends: 28 [2021-02-19 17:37:18,818 INFO L226 Difference]: Without dead ends: 24 [2021-02-19 17:37:18,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:37:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-19 17:37:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-02-19 17:37:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-02-19 17:37:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-02-19 17:37:18,827 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-02-19 17:37:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:18,827 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-02-19 17:37:18,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-19 17:37:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-02-19 17:37:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:37:18,828 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:37:18,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:19,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 17:37:19,045 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:37:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1614351959, now seen corresponding path program 1 times [2021-02-19 17:37:19,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:19,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15805225] [2021-02-19 17:37:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:19,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:19,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:19,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:19,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:37:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:19,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:19,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-19 17:37:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:19,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:19,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:37:19,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-19 17:37:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:19,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:19,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-19 17:37:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:19,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:37:19,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:37:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-19 17:37:19,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15805225] [2021-02-19 17:37:19,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:37:19,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 17:37:19,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884145886] [2021-02-19 17:37:19,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:37:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:37:19,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:37:19,187 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2021-02-19 17:37:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:19,309 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-02-19 17:37:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:37:19,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-02-19 17:37:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:19,310 INFO L225 Difference]: With dead ends: 24 [2021-02-19 17:37:19,310 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:37:19,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:37:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:37:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:37:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:37:19,312 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-02-19 17:37:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:19,312 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:37:19,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 17:37:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:37:19,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:37:19,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:37:19,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:37:19,372 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-19 17:37:19,372 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-19 17:37:19,372 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-19 17:37:19,372 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:37:19,373 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 17:37:19,373 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:37:19,373 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:37:19,373 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:37:19,373 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:37:19,373 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:37:19,374 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-02-19 17:37:19,374 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2021-02-19 17:37:19,374 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2021-02-19 17:37:19,374 INFO L189 CegarLoopUtils]: For program point L17(line 17) no Hoare annotation was computed. [2021-02-19 17:37:19,374 INFO L189 CegarLoopUtils]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-02-19 17:37:19,374 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-19 17:37:19,374 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-19 17:37:19,375 INFO L189 CegarLoopUtils]: For program point L16-2(lines 13 19) no Hoare annotation was computed. [2021-02-19 17:37:19,375 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2021-02-19 17:37:19,375 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2021-02-19 17:37:19,375 INFO L189 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-02-19 17:37:19,375 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-02-19 17:37:19,375 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-02-19 17:37:19,375 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-19 17:37:19,375 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-02-19 17:37:19,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:37:19 BoogieIcfgContainer [2021-02-19 17:37:19,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:37:19,382 INFO L168 Benchmark]: Toolchain (without parser) took 3690.60 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 126.6 MB in the beginning and 98.7 MB in the end (delta: 27.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 8.0 GB. [2021-02-19 17:37:19,383 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 123.0 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:37:19,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.66 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 116.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:37:19,384 INFO L168 Benchmark]: Boogie Preprocessor took 35.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:37:19,384 INFO L168 Benchmark]: RCFGBuilder took 412.86 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:37:19,385 INFO L168 Benchmark]: TraceAbstraction took 3007.57 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 100.9 MB in the beginning and 98.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-02-19 17:37:19,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.0 MB in the beginning and 123.0 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.66 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 116.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.86 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3007.57 ms. Allocated memory was 151.0 MB in the beginning and 186.6 MB in the end (delta: 35.7 MB). Free memory was 100.9 MB in the beginning and 98.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 58 SDslu, 105 SDs, 0 SdLazy, 238 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 37 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 5618 SizeOfPredicates, 1 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...