/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/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-15 23:38:31,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 23:38:31,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 23:38:31,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 23:38:31,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 23:38:31,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 23:38:31,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 23:38:31,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 23:38:31,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 23:38:31,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 23:38:31,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 23:38:31,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 23:38:31,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 23:38:31,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 23:38:31,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 23:38:31,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 23:38:31,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 23:38:31,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 23:38:31,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 23:38:31,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 23:38:31,508 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 [2021-04-15 23:38:31,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 23:38:31,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 23:38:31,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 23:38:31,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 23:38:31,523 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 23:38:31,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 23:38:31,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 23:38:31,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 23:38:31,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 23:38:31,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-15 23:38:31,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 23:38:31,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 23:38:31,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 23:38:31,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 23:38:31,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 23:38:31,783 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 23:38:31,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2021-04-15 23:38:31,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66972c856/4e08a2111263426fb4b0f7b598eef5c6/FLAG7b70d4b47 [2021-04-15 23:38:32,214 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 23:38:32,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2021-04-15 23:38:32,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66972c856/4e08a2111263426fb4b0f7b598eef5c6/FLAG7b70d4b47 [2021-04-15 23:38:32,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66972c856/4e08a2111263426fb4b0f7b598eef5c6 [2021-04-15 23:38:32,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 23:38:32,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 23:38:32,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 23:38:32,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 23:38:32,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 23:38:32,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71112c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32, skipping insertion in model container [2021-04-15 23:38:32,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 23:38:32,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 23:38:32,388 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002] [2021-04-15 23:38:32,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:38:32,395 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 23:38:32,406 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c[989,1002] [2021-04-15 23:38:32,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 23:38:32,424 INFO L208 MainTranslator]: Completed translation [2021-04-15 23:38:32,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32 WrapperNode [2021-04-15 23:38:32,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 23:38:32,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 23:38:32,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 23:38:32,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 23:38:32,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (1/1) ... [2021-04-15 23:38:32,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 23:38:32,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 23:38:32,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 23:38:32,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 23:38:32,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (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 [2021-04-15 23:38:32,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-15 23:38:32,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 23:38:32,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-15 23:38:32,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-15 23:38:32,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-15 23:38:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-15 23:38:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-15 23:38:32,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-15 23:38:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 23:38:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-15 23:38:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-15 23:38:32,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-15 23:38:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-15 23:38:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-15 23:38:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 23:38:32,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 23:38:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 23:38:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 23:38:32,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 23:38:32,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 23:38:32,745 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 23:38:32,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:38:32 BoogieIcfgContainer [2021-04-15 23:38:32,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 23:38:32,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 23:38:32,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 23:38:32,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 23:38:32,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 11:38:32" (1/3) ... [2021-04-15 23:38:32,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ae311f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:38:32, skipping insertion in model container [2021-04-15 23:38:32,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 11:38:32" (2/3) ... [2021-04-15 23:38:32,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ae311f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 11:38:32, skipping insertion in model container [2021-04-15 23:38:32,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 11:38:32" (3/3) ... [2021-04-15 23:38:32,751 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2021-04-15 23:38:32,754 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 23:38:32,756 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 23:38:32,786 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-15 23:38:32,814 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 23:38:32,815 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 23:38:32,815 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 23:38:32,815 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 23:38:32,815 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 23:38:32,815 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 23:38:32,815 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 23:38:32,815 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 23:38:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-15 23:38:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 23:38:32,834 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:38:32,834 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:38:32,834 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:38:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:38:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 1 times [2021-04-15 23:38:32,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:38:32,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661702430] [2021-04-15 23:38:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:38:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:32,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:32,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:32,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:32,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:32,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:32,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:38:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:33,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:38:33,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661702430] [2021-04-15 23:38:33,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 23:38:33,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 23:38:33,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892551859] [2021-04-15 23:38:33,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 23:38:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:38:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 23:38:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 23:38:33,075 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:38:33,148 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-04-15 23:38:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 23:38:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-15 23:38:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:38:33,154 INFO L225 Difference]: With dead ends: 26 [2021-04-15 23:38:33,154 INFO L226 Difference]: Without dead ends: 13 [2021-04-15 23:38:33,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 23:38:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-04-15 23:38:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-04-15 23:38:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-04-15 23:38:33,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-04-15 23:38:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:38:33,186 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-04-15 23:38:33,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-04-15 23:38:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 23:38:33,186 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:38:33,186 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:38:33,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 23:38:33,187 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:38:33,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:38:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 1 times [2021-04-15 23:38:33,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:38:33,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46423777] [2021-04-15 23:38:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:38:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:33,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,214 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 23:38:33,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:38:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:33,261 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:38:33,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46423777] [2021-04-15 23:38:33,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849402868] [2021-04-15 23:38:33,263 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 [2021-04-15 23:38:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:33,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 23:38:33,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 23:38:33,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-15 23:38:33,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-15 23:38:33,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-15 23:38:33,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-15 23:38:33,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,361 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.2 percent of original size [2021-04-15 23:38:33,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-04-15 23:38:33,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-04-15 23:38:33,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-04-15 23:38:33,366 INFO L142 QuantifierPusher]: treesize reduction 1, result has 96.6 percent of original size [2021-04-15 23:38:33,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,373 INFO L725 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-04-15 23:38:33,375 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-15 23:38:33,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-15 23:38:33,381 INFO L725 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-04-15 23:38:33,382 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,383 INFO L142 QuantifierPusher]: treesize reduction 15, result has 34.8 percent of original size [2021-04-15 23:38:33,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:38:33,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:38:33,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:38:33,391 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-04-15 23:38:33,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:38:33,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 23:38:33,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-04-15 23:38:33,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950991198] [2021-04-15 23:38:33,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 23:38:33,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:38:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 23:38:33,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-04-15 23:38:33,396 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:38:33,496 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-04-15 23:38:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 23:38:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-15 23:38:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:38:33,497 INFO L225 Difference]: With dead ends: 17 [2021-04-15 23:38:33,497 INFO L226 Difference]: Without dead ends: 14 [2021-04-15 23:38:33,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 23:38:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-04-15 23:38:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-04-15 23:38:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-04-15 23:38:33,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-04-15 23:38:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:38:33,501 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-04-15 23:38:33,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-04-15 23:38:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 23:38:33,501 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:38:33,502 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:38:33,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 23:38:33,718 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:38:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:38:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1865138417, now seen corresponding path program 2 times [2021-04-15 23:38:33,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:38:33,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952777115] [2021-04-15 23:38:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:38:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:33,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,744 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-15 23:38:33,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 23:38:33,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:38:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:33,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:38:33,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952777115] [2021-04-15 23:38:33,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211390673] [2021-04-15 23:38:33,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 23:38:33,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 23:38:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 23:38:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 23:38:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 23:38:33,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,912 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,913 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,916 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:33,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,929 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,931 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,935 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-15 23:38:33,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-15 23:38:33,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-15 23:38:33,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-15 23:38:33,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:33,969 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-15 23:38:33,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-15 23:38:33,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-04-15 23:38:33,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-15 23:38:33,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-15 23:38:33,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-15 23:38:33,988 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.7 percent of original size [2021-04-15 23:38:33,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-04-15 23:38:33,989 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:33,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:33,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-04-15 23:38:33,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-04-15 23:38:33,998 INFO L142 QuantifierPusher]: treesize reduction 1, result has 96.8 percent of original size [2021-04-15 23:38:34,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:34,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,013 INFO L725 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-04-15 23:38:34,015 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:34,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-15 23:38:34,029 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-15 23:38:34,030 INFO L725 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-04-15 23:38:34,031 INFO L732 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 23:38:34,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:38:34,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:38:34,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 23:38:34,051 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-04-15 23:38:34,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,053 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 23:38:34,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 23:38:34,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-04-15 23:38:34,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007401316] [2021-04-15 23:38:34,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 23:38:34,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:38:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 23:38:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-15 23:38:34,055 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:38:34,196 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-04-15 23:38:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 23:38:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-04-15 23:38:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:38:34,197 INFO L225 Difference]: With dead ends: 18 [2021-04-15 23:38:34,197 INFO L226 Difference]: Without dead ends: 15 [2021-04-15 23:38:34,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 23:38:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-04-15 23:38:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-04-15 23:38:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-04-15 23:38:34,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-04-15 23:38:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:38:34,200 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-04-15 23:38:34,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-04-15 23:38:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 23:38:34,201 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 23:38:34,201 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 23:38:34,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 23:38:34,429 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 23:38:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 23:38:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653611, now seen corresponding path program 3 times [2021-04-15 23:38:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 23:38:34,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252704499] [2021-04-15 23:38:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 23:38:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:34,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 23:38:34,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-15 23:38:34,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,465 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 23:38:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 23:38:34,488 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 23:38:34,489 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 23:38:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 23:38:34,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252704499] [2021-04-15 23:38:34,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 23:38:34,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 23:38:34,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620482471] [2021-04-15 23:38:34,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 23:38:34,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 23:38:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 23:38:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 23:38:34,490 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 23:38:34,545 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-04-15 23:38:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 23:38:34,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-04-15 23:38:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 23:38:34,546 INFO L225 Difference]: With dead ends: 15 [2021-04-15 23:38:34,546 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 23:38:34,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 23:38:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 23:38:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 23:38:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 23:38:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 23:38:34,547 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-04-15 23:38:34,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 23:38:34,547 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 23:38:34,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 23:38:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 23:38:34,547 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 23:38:34,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 23:38:34,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-04-15 23:38:34,647 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-04-15 23:38:34,647 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L194 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)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= ~__return_144~0 |old(~__return_144~0)|)) [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-04-15 23:38:34,648 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-04-15 23:38:34,648 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 13 60) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point L25(lines 25 58) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 13 60) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point L19(lines 19 59) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point L46(lines 46 55) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 13 60) no Hoare annotation was computed. [2021-04-15 23:38:34,649 INFO L194 CegarLoopUtils]: At program point L37(lines 30 58) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and .cse0 (<= (+ main_~main__x~0 50) 0)) (and (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0))) [2021-04-15 23:38:34,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 11:38:34 BoogieIcfgContainer [2021-04-15 23:38:34,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 23:38:34,659 INFO L168 Benchmark]: Toolchain (without parser) took 2422.56 ms. Allocated memory was 203.4 MB in the beginning and 261.1 MB in the end (delta: 57.7 MB). Free memory was 167.5 MB in the beginning and 240.8 MB in the end (delta: -73.3 MB). Peak memory consumption was 99.6 MB. Max. memory is 8.0 GB. [2021-04-15 23:38:34,659 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory was 184.6 MB in the beginning and 184.5 MB in the end (delta: 78.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 23:38:34,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 187.17 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 187.7 MB in the end (delta: -20.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 8.0 GB. [2021-04-15 23:38:34,659 INFO L168 Benchmark]: Boogie Preprocessor took 40.38 ms. Allocated memory is still 203.4 MB. Free memory was 187.7 MB in the beginning and 186.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-15 23:38:34,659 INFO L168 Benchmark]: RCFGBuilder took 279.70 ms. Allocated memory is still 203.4 MB. Free memory was 186.6 MB in the beginning and 172.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-15 23:38:34,660 INFO L168 Benchmark]: TraceAbstraction took 1910.95 ms. Allocated memory was 203.4 MB in the beginning and 261.1 MB in the end (delta: 57.7 MB). Free memory was 172.0 MB in the beginning and 240.8 MB in the end (delta: -68.9 MB). Peak memory consumption was 104.3 MB. Max. memory is 8.0 GB. [2021-04-15 23:38:34,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 203.4 MB. Free memory was 184.6 MB in the beginning and 184.5 MB in the end (delta: 78.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 187.17 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 187.7 MB in the end (delta: -20.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.38 ms. Allocated memory is still 203.4 MB. Free memory was 187.7 MB in the beginning and 186.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 279.70 ms. Allocated memory is still 203.4 MB. Free memory was 186.6 MB in the beginning and 172.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1910.95 ms. Allocated memory was 203.4 MB in the beginning and 261.1 MB in the end (delta: 57.7 MB). Free memory was 172.0 MB in the beginning and 240.8 MB in the end (delta: -68.9 MB). Peak memory consumption was 104.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1734.5ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 6.6ms, AutomataDifference: 393.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 99.4ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 37 SDslu, 52 SDs, 0 SdLazy, 97 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 75.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 428.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 8 NumberOfFragments, 61 HoareAnnotationTreeSize, 5 FomulaSimplifications, 96 FormulaSimplificationTreeSizeReduction, 11.1ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 100 FormulaSimplificationTreeSizeReductionInter, 83.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 28.6ms SsaConstructionTime, 98.0ms SatisfiabilityAnalysisTime, 554.2ms InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 318 SizeOfPredicates, 6 NumberOfNonLiveVariables, 227 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 6/14 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (\old(__return_144) == __return_144 && main__x + 50 <= 0) || (main__x + 2 <= main__y && \old(__return_144) == __return_144) RESULT: Ultimate proved your program to be correct! Received shutdown request...