/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/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:14:58,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:14:58,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:14:58,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:14:58,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:14:58,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:14:58,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:14:58,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:14:58,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:14:58,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:14:58,345 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:14:58,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:14:58,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:14:58,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:14:58,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:14:58,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:14:58,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:14:58,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:14:58,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:14:58,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:14:58,370 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 [2021-02-23 13:14:58,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:14:58,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:14:58,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:14:58,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:14:58,411 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:14:58,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:14:58,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:14:58,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:14:58,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:14:58,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:14:58,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:14:58,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:14:58,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:14:58,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:14:58,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:14:58,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:14:58,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:14:58,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:14:58,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:14:58,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:14:58,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:14:58,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:14:58,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:14:58,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:14:58,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:14:58,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:14:58,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:14:58,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:14:58,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:14:58,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:14:58,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:14:58,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:14:58,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:14:58,833 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:14:58,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-23 13:14:58,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f132f88/3a24d29690b34f7a8faac3ad9b4b029d/FLAG206f48cb1 [2021-02-23 13:14:59,445 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:14:59,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2021-02-23 13:14:59,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f132f88/3a24d29690b34f7a8faac3ad9b4b029d/FLAG206f48cb1 [2021-02-23 13:14:59,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f132f88/3a24d29690b34f7a8faac3ad9b4b029d [2021-02-23 13:14:59,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:14:59,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:14:59,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:14:59,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:14:59,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:14:59,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:14:59" (1/1) ... [2021-02-23 13:14:59,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa789ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:14:59, skipping insertion in model container [2021-02-23 13:14:59,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:14:59" (1/1) ... [2021-02-23 13:14:59,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:14:59,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:15:00,088 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/gcd01-1.c[1008,1021] [2021-02-23 13:15:00,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:15:00,105 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:15:00,122 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/gcd01-1.c[1008,1021] [2021-02-23 13:15:00,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:15:00,139 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:15:00,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00 WrapperNode [2021-02-23 13:15:00,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:15:00,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:15:00,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:15:00,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:15:00,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... [2021-02-23 13:15:00,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:15:00,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:15:00,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:15:00,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:15:00,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:15:00,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:15:00,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:15:00,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:15:00,290 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-02-23 13:15:00,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:15:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:15:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:15:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:15:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:15:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:15:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-02-23 13:15:00,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:15:00,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:15:00,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:15:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:15:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:15:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:15:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:15:00,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:15:00,599 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 13:15:00,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:15:00 BoogieIcfgContainer [2021-02-23 13:15:00,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:15:00,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:15:00,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:15:00,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:15:00,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:14:59" (1/3) ... [2021-02-23 13:15:00,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c6c7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:15:00, skipping insertion in model container [2021-02-23 13:15:00,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:15:00" (2/3) ... [2021-02-23 13:15:00,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c6c7c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:15:00, skipping insertion in model container [2021-02-23 13:15:00,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:15:00" (3/3) ... [2021-02-23 13:15:00,612 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2021-02-23 13:15:00,629 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:15:00,636 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:15:00,676 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:15:00,712 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:15:00,713 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:15:00,713 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:15:00,713 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:15:00,713 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:15:00,728 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:15:00,728 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:15:00,728 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:15:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-02-23 13:15:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-23 13:15:00,807 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:00,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:15:00,810 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1749454543, now seen corresponding path program 1 times [2021-02-23 13:15:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:00,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984450891] [2021-02-23 13:15:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:01,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:01,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:01,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:01,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:01,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:01,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:15:01,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984450891] [2021-02-23 13:15:01,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:01,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 13:15:01,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833585788] [2021-02-23 13:15:01,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 13:15:01,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 13:15:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:15:01,286 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2021-02-23 13:15:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:01,749 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-02-23 13:15:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 13:15:01,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2021-02-23 13:15:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:01,761 INFO L225 Difference]: With dead ends: 41 [2021-02-23 13:15:01,762 INFO L226 Difference]: Without dead ends: 25 [2021-02-23 13:15:01,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-23 13:15:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-02-23 13:15:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-02-23 13:15:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-23 13:15:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-23 13:15:01,814 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2021-02-23 13:15:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:01,815 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-23 13:15:01,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 13:15:01,815 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-23 13:15:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:15:01,817 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:01,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:15:01,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:15:01,818 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2120307351, now seen corresponding path program 1 times [2021-02-23 13:15:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:01,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499164310] [2021-02-23 13:15:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:01,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:01,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:01,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:01,923 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:01,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:01,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:01,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:01,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:15:01,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499164310] [2021-02-23 13:15:01,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:01,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 13:15:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127300469] [2021-02-23 13:15:01,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 13:15:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 13:15:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:15:01,964 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 7 states. [2021-02-23 13:15:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:02,255 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-02-23 13:15:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 13:15:02,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-02-23 13:15:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:02,257 INFO L225 Difference]: With dead ends: 31 [2021-02-23 13:15:02,257 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 13:15:02,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-23 13:15:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 13:15:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-23 13:15:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-23 13:15:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-02-23 13:15:02,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2021-02-23 13:15:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:02,269 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-02-23 13:15:02,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 13:15:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-02-23 13:15:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:15:02,270 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:02,270 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] [2021-02-23 13:15:02,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:15:02,271 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1921119129, now seen corresponding path program 1 times [2021-02-23 13:15:02,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:02,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802946263] [2021-02-23 13:15:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:02,382 WARN L141 QuantifierPusher]: treesize reduction 10, result has 44.4 percent of original size [2021-02-23 13:15:02,383 WARN L147 QuantifierPusher]: treesize reduction 10, result has 44.4 percent of original size 8 [2021-02-23 13:15:02,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 13:15:02,405 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 13:15:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:02,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 13:15:02,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802946263] [2021-02-23 13:15:02,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:02,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:15:02,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492652929] [2021-02-23 13:15:02,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:15:02,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:02,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:15:02,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:15:02,447 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2021-02-23 13:15:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:02,748 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-02-23 13:15:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 13:15:02,749 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-02-23 13:15:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:02,750 INFO L225 Difference]: With dead ends: 37 [2021-02-23 13:15:02,750 INFO L226 Difference]: Without dead ends: 29 [2021-02-23 13:15:02,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-23 13:15:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-23 13:15:02,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-02-23 13:15:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-23 13:15:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-02-23 13:15:02,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 24 [2021-02-23 13:15:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:02,761 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-02-23 13:15:02,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:15:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-02-23 13:15:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:15:02,763 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:02,763 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] [2021-02-23 13:15:02,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:15:02,763 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:02,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:02,764 INFO L82 PathProgramCache]: Analyzing trace with hash -575359383, now seen corresponding path program 1 times [2021-02-23 13:15:02,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:02,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279789787] [2021-02-23 13:15:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:02,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:02,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 13:15:02,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:02,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 13:15:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:02,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:02,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:02,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:15:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-23 13:15:02,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279789787] [2021-02-23 13:15:02,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:02,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:15:02,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079993202] [2021-02-23 13:15:02,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:15:02,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:15:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:15:02,934 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 8 states. [2021-02-23 13:15:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:03,220 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-02-23 13:15:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 13:15:03,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2021-02-23 13:15:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:03,222 INFO L225 Difference]: With dead ends: 37 [2021-02-23 13:15:03,222 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 13:15:03,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-23 13:15:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 13:15:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-02-23 13:15:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-02-23 13:15:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-02-23 13:15:03,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2021-02-23 13:15:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:03,230 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-02-23 13:15:03,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:15:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-02-23 13:15:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:15:03,232 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:03,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:15:03,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:15:03,232 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1225207111, now seen corresponding path program 1 times [2021-02-23 13:15:03,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:03,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090560935] [2021-02-23 13:15:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 13:15:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-23 13:15:03,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090560935] [2021-02-23 13:15:03,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:03,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:15:03,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451168686] [2021-02-23 13:15:03,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:15:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:15:03,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:15:03,358 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2021-02-23 13:15:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:03,629 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-02-23 13:15:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 13:15:03,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-02-23 13:15:03,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:03,631 INFO L225 Difference]: With dead ends: 32 [2021-02-23 13:15:03,631 INFO L226 Difference]: Without dead ends: 28 [2021-02-23 13:15:03,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-23 13:15:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-23 13:15:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-02-23 13:15:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-23 13:15:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-02-23 13:15:03,638 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 25 [2021-02-23 13:15:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:03,638 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-02-23 13:15:03,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:15:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-02-23 13:15:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:15:03,640 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:03,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:15:03,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:15:03,640 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1830908953, now seen corresponding path program 1 times [2021-02-23 13:15:03,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:03,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053258084] [2021-02-23 13:15:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 13:15:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:03,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:03,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:03,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-23 13:15:03,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053258084] [2021-02-23 13:15:03,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:03,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:15:03,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730166112] [2021-02-23 13:15:03,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:15:03,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:03,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:15:03,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:15:03,751 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2021-02-23 13:15:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:04,009 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-02-23 13:15:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 13:15:04,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2021-02-23 13:15:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:04,012 INFO L225 Difference]: With dead ends: 35 [2021-02-23 13:15:04,012 INFO L226 Difference]: Without dead ends: 31 [2021-02-23 13:15:04,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-23 13:15:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-23 13:15:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-23 13:15:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-23 13:15:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-02-23 13:15:04,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2021-02-23 13:15:04,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:04,021 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-02-23 13:15:04,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:15:04,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-02-23 13:15:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-23 13:15:04,022 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:15:04,022 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:15:04,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:15:04,023 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:15:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:15:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash -766699319, now seen corresponding path program 1 times [2021-02-23 13:15:04,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:15:04,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508197314] [2021-02-23 13:15:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:15:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:04,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:04,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:04,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:15:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:04,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:04,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:15:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:04,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:04,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 13:15:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:04,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:04,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-02-23 13:15:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:15:04,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:15:04,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:15:04,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:15:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-23 13:15:04,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508197314] [2021-02-23 13:15:04,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:15:04,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 13:15:04,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402468859] [2021-02-23 13:15:04,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 13:15:04,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:15:04,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 13:15:04,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:15:04,164 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 9 states. [2021-02-23 13:15:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:15:04,441 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-02-23 13:15:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 13:15:04,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2021-02-23 13:15:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:15:04,442 INFO L225 Difference]: With dead ends: 31 [2021-02-23 13:15:04,442 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:15:04,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-23 13:15:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:15:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:15:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:15:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:15:04,445 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-02-23 13:15:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:15:04,446 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:15:04,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 13:15:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:15:04,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:15:04,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 13:15:04,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:15:04,635 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:15:04,635 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:15:04,635 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:15:04,635 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:15:04,635 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 13:15:04,636 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:15:04,636 INFO L189 CegarLoopUtils]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2021-02-23 13:15:04,636 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (<= (+ gcd_~y1 1) gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2021-02-23 13:15:04,636 INFO L189 CegarLoopUtils]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2021-02-23 13:15:04,636 INFO L189 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-02-23 13:15:04,636 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2021-02-23 13:15:04,636 INFO L189 CegarLoopUtils]: For program point L24(lines 24 26) no Hoare annotation was computed. [2021-02-23 13:15:04,637 INFO L189 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-02-23 13:15:04,637 INFO L192 CegarLoopUtils]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2021-02-23 13:15:04,637 INFO L189 CegarLoopUtils]: For program point L21(lines 21 23) no Hoare annotation was computed. [2021-02-23 13:15:04,637 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-02-23 13:15:04,637 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:15:04,637 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:15:04,637 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:15:04,637 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:15:04,638 INFO L189 CegarLoopUtils]: For program point L32(lines 32 34) no Hoare annotation was computed. [2021-02-23 13:15:04,638 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2021-02-23 13:15:04,638 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2021-02-23 13:15:04,638 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 30 45) no Hoare annotation was computed. [2021-02-23 13:15:04,638 INFO L189 CegarLoopUtils]: For program point L41(line 41) no Hoare annotation was computed. [2021-02-23 13:15:04,638 INFO L189 CegarLoopUtils]: For program point L40(lines 40 44) no Hoare annotation was computed. [2021-02-23 13:15:04,640 INFO L185 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2021-02-23 13:15:04,640 INFO L189 CegarLoopUtils]: For program point L40-1(lines 30 45) no Hoare annotation was computed. [2021-02-23 13:15:04,640 INFO L189 CegarLoopUtils]: For program point L39-1(line 39) no Hoare annotation was computed. [2021-02-23 13:15:04,642 INFO L189 CegarLoopUtils]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-02-23 13:15:04,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:15:04 BoogieIcfgContainer [2021-02-23 13:15:04,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:15:04,655 INFO L168 Benchmark]: Toolchain (without parser) took 4802.90 ms. Allocated memory was 152.0 MB in the beginning and 186.6 MB in the end (delta: 34.6 MB). Free memory was 128.3 MB in the beginning and 99.4 MB in the end (delta: 28.9 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:15:04,656 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:15:04,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.64 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:15:04,663 INFO L168 Benchmark]: Boogie Preprocessor took 38.37 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:15:04,664 INFO L168 Benchmark]: RCFGBuilder took 420.84 ms. Allocated memory is still 152.0 MB. Free memory was 116.3 MB in the beginning and 101.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:15:04,664 INFO L168 Benchmark]: TraceAbstraction took 4046.50 ms. Allocated memory was 152.0 MB in the beginning and 186.6 MB in the end (delta: 34.6 MB). Free memory was 101.4 MB in the beginning and 99.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:15:04,669 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 152.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.64 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.37 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 420.84 ms. Allocated memory is still 152.0 MB. Free memory was 116.3 MB in the beginning and 101.8 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4046.50 ms. Allocated memory was 152.0 MB in the beginning and 186.6 MB in the end (delta: 34.6 MB). Free memory was 101.4 MB in the beginning and 99.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 127 SDtfs, 205 SDslu, 211 SDs, 0 SdLazy, 634 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 72 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 160 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 157 ConstructedInterpolants, 0 QuantifiedInterpolants, 12324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...