/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 0.2.0-7d8eed3 [2020-11-06 22:02:03,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:02:03,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:02:03,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:02:03,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:02:03,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:02:03,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:02:03,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:02:03,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:02:03,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:02:03,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:02:03,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:02:03,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:02:03,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:02:03,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:02:03,179 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 [2020-11-06 22:02:03,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:02:03,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:02:03,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:02:03,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:02:03,242 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:02:03,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:02:03,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:02:03,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:02:03,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:02:03,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:02:03,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:02:03,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:02:03,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:02:03,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:02:03,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:02:03,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:02:03,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:02:03,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:02:03,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:02:03,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:02:03,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:02:03,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:02:03,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:02:03,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:02:03,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:02:03,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:02:03,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:02:03,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:02:03,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:02:03,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:02:03,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:02:03,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:02:03,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:02:03,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:02:03,700 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:02:03,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-11-06 22:02:03,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede534ffd/98e1cbad75104d4ead685519187863c2/FLAG4cb1d831c [2020-11-06 22:02:04,492 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:02:04,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-11-06 22:02:04,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede534ffd/98e1cbad75104d4ead685519187863c2/FLAG4cb1d831c [2020-11-06 22:02:04,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede534ffd/98e1cbad75104d4ead685519187863c2 [2020-11-06 22:02:04,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:02:04,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:02:04,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:02:04,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:02:04,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:02:04,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:04" (1/1) ... [2020-11-06 22:02:04,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649fb838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:04, skipping insertion in model container [2020-11-06 22:02:04,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:04" (1/1) ... [2020-11-06 22:02:04,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:02:04,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:02:05,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:02:05,091 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:02:05,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:02:05,142 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:02:05,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05 WrapperNode [2020-11-06 22:02:05,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:02:05,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:02:05,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:02:05,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:02:05,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (1/1) ... [2020-11-06 22:02:05,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:02:05,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:02:05,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:02:05,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:02:05,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (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 [2020-11-06 22:02:05,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:02:05,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:02:05,299 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:02:05,300 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-11-06 22:02:05,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:02:05,301 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:02:05,301 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:02:05,301 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:02:05,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:02:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:02:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-11-06 22:02:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:02:05,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:02:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:02:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:02:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:02:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:02:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:02:05,680 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:02:05,681 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:02:05,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:05 BoogieIcfgContainer [2020-11-06 22:02:05,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:02:05,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:02:05,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:02:05,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:02:05,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:04" (1/3) ... [2020-11-06 22:02:05,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d496f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:05, skipping insertion in model container [2020-11-06 22:02:05,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:05" (2/3) ... [2020-11-06 22:02:05,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d496f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:05, skipping insertion in model container [2020-11-06 22:02:05,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:05" (3/3) ... [2020-11-06 22:02:05,693 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-11-06 22:02:05,741 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:02:05,750 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:02:05,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:02:05,861 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:02:05,861 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:02:05,861 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:02:05,861 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:02:05,862 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:02:05,862 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:02:05,864 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:02:05,864 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:02:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-06 22:02:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:02:05,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:05,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:05,909 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1045360095, now seen corresponding path program 1 times [2020-11-06 22:02:05,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:05,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333843710] [2020-11-06 22:02:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:06,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:06,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:02:06,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333843710] [2020-11-06 22:02:06,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:06,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:02:06,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032215808] [2020-11-06 22:02:06,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:02:06,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:02:06,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:02:06,350 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 7 states. [2020-11-06 22:02:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:06,764 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-11-06 22:02:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:02:06,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-06 22:02:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:06,776 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:02:06,777 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:02:06,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:02:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:02:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:02:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:02:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-11-06 22:02:06,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2020-11-06 22:02:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:06,837 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-11-06 22:02:06,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:02:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-11-06 22:02:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:02:06,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:06,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:06,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:02:06,840 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1752822076, now seen corresponding path program 1 times [2020-11-06 22:02:06,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:06,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427610181] [2020-11-06 22:02:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:06,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:02:07,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427610181] [2020-11-06 22:02:07,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:07,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:02:07,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073885176] [2020-11-06 22:02:07,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:02:07,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:02:07,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:02:07,044 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-11-06 22:02:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:07,336 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-11-06 22:02:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:02:07,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-11-06 22:02:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:07,339 INFO L225 Difference]: With dead ends: 33 [2020-11-06 22:02:07,339 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:02:07,341 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 [2020-11-06 22:02:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:02:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-11-06 22:02:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:02:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-11-06 22:02:07,352 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2020-11-06 22:02:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:07,352 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-11-06 22:02:07,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:02:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-11-06 22:02:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:02:07,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:07,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:07,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:02:07,355 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1214823211, now seen corresponding path program 1 times [2020-11-06 22:02:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:07,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240302451] [2020-11-06 22:02:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:07,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:07,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-06 22:02:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:02:07,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240302451] [2020-11-06 22:02:07,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:07,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:02:07,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108718403] [2020-11-06 22:02:07,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:02:07,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:02:07,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:02:07,540 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-11-06 22:02:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:07,914 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-11-06 22:02:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:02:07,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-06 22:02:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:07,917 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:02:07,917 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:02:07,918 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 [2020-11-06 22:02:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:02:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-11-06 22:02:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 22:02:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-06 22:02:07,929 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2020-11-06 22:02:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:07,930 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-06 22:02:07,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:02:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-06 22:02:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:02:07,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:07,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:07,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:02:07,932 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash -16297623, now seen corresponding path program 1 times [2020-11-06 22:02:07,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:07,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671828434] [2020-11-06 22:02:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-06 22:02:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:02:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671828434] [2020-11-06 22:02:08,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:08,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:02:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997366097] [2020-11-06 22:02:08,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:02:08,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:02:08,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:02:08,079 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2020-11-06 22:02:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:08,384 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-06 22:02:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:02:08,385 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-06 22:02:08,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:08,386 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:02:08,386 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:02:08,387 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 [2020-11-06 22:02:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:02:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-11-06 22:02:08,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:02:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-11-06 22:02:08,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 25 [2020-11-06 22:02:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:08,396 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-11-06 22:02:08,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:02:08,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-11-06 22:02:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:02:08,398 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:08,398 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, 1] [2020-11-06 22:02:08,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:02:08,398 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:08,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash -962370060, now seen corresponding path program 1 times [2020-11-06 22:02:08,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:08,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257205966] [2020-11-06 22:02:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-06 22:02:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:02:08,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257205966] [2020-11-06 22:02:08,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:08,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:02:08,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498673076] [2020-11-06 22:02:08,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:02:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:02:08,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:02:08,535 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-11-06 22:02:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:08,798 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-11-06 22:02:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:02:08,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-06 22:02:08,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:08,800 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:02:08,800 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:02:08,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:02:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:02:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-06 22:02:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-06 22:02:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-06 22:02:08,809 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 26 [2020-11-06 22:02:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:08,810 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-06 22:02:08,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:02:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-06 22:02:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:02:08,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:08,811 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, 1] [2020-11-06 22:02:08,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:02:08,812 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash -712052588, now seen corresponding path program 1 times [2020-11-06 22:02:08,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:08,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834833169] [2020-11-06 22:02:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-06 22:02:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:02:08,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834833169] [2020-11-06 22:02:08,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:08,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:02:08,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364173685] [2020-11-06 22:02:08,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:02:08,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:08,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:02:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:02:08,915 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-11-06 22:02:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:09,178 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-06 22:02:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:02:09,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-11-06 22:02:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:09,180 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:02:09,180 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:02:09,181 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 [2020-11-06 22:02:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:02:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:02:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:02:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-11-06 22:02:09,189 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 26 [2020-11-06 22:02:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:09,190 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-11-06 22:02:09,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:02:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-11-06 22:02:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:02:09,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:09,192 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, 1] [2020-11-06 22:02:09,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:02:09,192 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1034931100, now seen corresponding path program 1 times [2020-11-06 22:02:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:09,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027774481] [2020-11-06 22:02:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:09,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:09,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:09,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-06 22:02:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:09,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-06 22:02:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-06 22:02:09,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027774481] [2020-11-06 22:02:09,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:09,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:02:09,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974211426] [2020-11-06 22:02:09,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:02:09,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:02:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:02:09,338 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 9 states. [2020-11-06 22:02:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:09,617 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-11-06 22:02:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:02:09,618 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-06 22:02:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:09,618 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:02:09,619 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:02:09,621 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 [2020-11-06 22:02:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:02:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:02:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:02:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:02:09,622 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-11-06 22:02:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:09,622 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:02:09,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:02:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:02:09,623 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:02:09,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:02:09,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:02:09,762 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:02:09,762 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:02:09,763 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:02:09,763 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:02:09,763 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:02:09,763 INFO L262 CegarLoopResult]: 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|)) [2020-11-06 22:02:09,763 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:02:09,763 INFO L266 CegarLoopResult]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2020-11-06 22:02:09,764 INFO L262 CegarLoopResult]: 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)) [2020-11-06 22:02:09,764 INFO L266 CegarLoopResult]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2020-11-06 22:02:09,764 INFO L266 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-06 22:02:09,764 INFO L262 CegarLoopResult]: 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|)) [2020-11-06 22:02:09,764 INFO L266 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-11-06 22:02:09,764 INFO L266 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-06 22:02:09,764 INFO L269 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-11-06 22:02:09,764 INFO L266 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-11-06 22:02:09,765 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:02:09,765 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:02:09,765 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:02:09,765 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:02:09,765 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:02:09,765 INFO L266 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-11-06 22:02:09,765 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 30 45) the Hoare annotation is: true [2020-11-06 22:02:09,765 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 30 45) no Hoare annotation was computed. [2020-11-06 22:02:09,766 INFO L262 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-11-06 22:02:09,766 INFO L266 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-11-06 22:02:09,766 INFO L266 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-11-06 22:02:09,766 INFO L262 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-11-06 22:02:09,766 INFO L266 CegarLoopResult]: For program point L40-1(lines 30 45) no Hoare annotation was computed. [2020-11-06 22:02:09,766 INFO L266 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-06 22:02:09,766 INFO L266 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-11-06 22:02:09,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:02:09 BoogieIcfgContainer [2020-11-06 22:02:09,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:02:09,775 INFO L168 Benchmark]: Toolchain (without parser) took 4908.22 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 132.5 MB in the beginning and 77.5 MB in the end (delta: 55.0 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:09,776 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 98.5 MB in the beginning and 98.4 MB in the end (delta: 67.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:02:09,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.69 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 122.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:09,777 INFO L168 Benchmark]: Boogie Preprocessor took 58.89 ms. Allocated memory is still 157.3 MB. Free memory was 122.1 MB in the beginning and 120.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:09,778 INFO L168 Benchmark]: RCFGBuilder took 473.36 ms. Allocated memory is still 157.3 MB. Free memory was 120.8 MB in the beginning and 132.5 MB in the end (delta: -11.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:09,779 INFO L168 Benchmark]: TraceAbstraction took 4086.94 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 132.1 MB in the beginning and 77.5 MB in the end (delta: 54.6 MB). Peak memory consumption was 87.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:02:09,782 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 98.5 MB in the beginning and 98.4 MB in the end (delta: 67.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 273.69 ms. Allocated memory is still 157.3 MB. Free memory was 131.9 MB in the beginning and 122.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.89 ms. Allocated memory is still 157.3 MB. Free memory was 122.1 MB in the beginning and 120.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 473.36 ms. Allocated memory is still 157.3 MB. Free memory was 120.8 MB in the beginning and 132.5 MB in the end (delta: -11.7 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4086.94 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 132.1 MB in the beginning and 77.5 MB in the end (delta: 54.6 MB). Peak memory consumption was 87.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 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: 134 SDtfs, 201 SDslu, 241 SDs, 0 SdLazy, 659 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s 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=32occurred 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, 10 LocationsWithAnnotation, 22 PreInvPairs, 22 NumberOfFragments, 74 HoareAnnotationTreeSize, 22 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 160 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 13024 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...