/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:32:51,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:32:51,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:32:51,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:32:51,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:32:51,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:32:51,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:32:51,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:32:51,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:32:51,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:32:51,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:32:51,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:32:51,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:32:51,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:32:51,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:32:51,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:32:51,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:32:51,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:32:51,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:32:51,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:32:51,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:32:51,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:32:51,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:32:51,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:32:51,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:32:51,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:32:51,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:32:51,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:32:51,368 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 [2020-07-07 11:32:51,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:32:51,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:32:51,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:32:51,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:32:51,385 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:32:51,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:32:51,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:32:51,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:32:51,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:32:51,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:32:51,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:32:51,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:32:51,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:32:51,386 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:32:51,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:32:51,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:32:51,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:32:51,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:32:51,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:32:51,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:32:51,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:32:51,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:32:51,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:32:51,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:32:51,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:32:51,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:32:51,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:32:51,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:32:51,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:32:51,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:32:51,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:32:51,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:32:51,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:32:51,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:32:51,758 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:32:51,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-07 11:32:51,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601c622ae/93e0fa8179dc4fd18e96f5f6f6edc81a/FLAG1405ecd20 [2020-07-07 11:32:52,393 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:32:52,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-07 11:32:52,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601c622ae/93e0fa8179dc4fd18e96f5f6f6edc81a/FLAG1405ecd20 [2020-07-07 11:32:52,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601c622ae/93e0fa8179dc4fd18e96f5f6f6edc81a [2020-07-07 11:32:52,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:32:52,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:32:52,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:52,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:32:52,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:32:52,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:52" (1/1) ... [2020-07-07 11:32:52,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8033bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:52, skipping insertion in model container [2020-07-07 11:32:52,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:52" (1/1) ... [2020-07-07 11:32:52,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:32:52,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:32:53,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:53,034 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:32:53,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:53,080 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:32:53,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53 WrapperNode [2020-07-07 11:32:53,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:53,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:32:53,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:32:53,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:32:53,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (1/1) ... [2020-07-07 11:32:53,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:32:53,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:32:53,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:32:53,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:32:53,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (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 [2020-07-07 11:32:53,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:32:53,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:32:53,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:32:53,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:32:53,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:32:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:32:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:32:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:32:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:32:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 11:32:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:32:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:32:53,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:32:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:32:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:32:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:32:53,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:32:53,645 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:32:53,645 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-07 11:32:53,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:53 BoogieIcfgContainer [2020-07-07 11:32:53,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:32:53,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:32:53,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:32:53,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:32:53,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:32:52" (1/3) ... [2020-07-07 11:32:53,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e0af2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:53, skipping insertion in model container [2020-07-07 11:32:53,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:53" (2/3) ... [2020-07-07 11:32:53,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e0af2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:53, skipping insertion in model container [2020-07-07 11:32:53,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:53" (3/3) ... [2020-07-07 11:32:53,661 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-07 11:32:53,674 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:32:53,681 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:32:53,697 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:32:53,728 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:32:53,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:32:53,728 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:32:53,729 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:32:53,729 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:32:53,729 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:32:53,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:32:53,730 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:32:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-07 11:32:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:32:53,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:53,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:53,756 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-07 11:32:53,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:53,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557989094] [2020-07-07 11:32:53,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:54,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557989094] [2020-07-07 11:32:54,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:54,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 11:32:54,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852059898] [2020-07-07 11:32:54,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:32:54,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:32:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:54,034 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-07-07 11:32:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:54,266 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-07 11:32:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:32:54,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-07 11:32:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:54,280 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:32:54,280 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:32:54,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:32:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:32:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-07 11:32:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:32:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-07 11:32:54,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-07 11:32:54,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:54,336 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-07 11:32:54,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:32:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-07 11:32:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:54,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:54,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:54,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:32:54,338 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-07 11:32:54,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:54,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770722583] [2020-07-07 11:32:54,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:32:54,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770722583] [2020-07-07 11:32:54,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651288389] [2020-07-07 11:32:54,440 INFO L94 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 [2020-07-07 11:32:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:54,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:32:54,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:32:54,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:54,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-07 11:32:54,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812635914] [2020-07-07 11:32:54,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:32:54,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:54,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:32:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:32:54,567 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-07 11:32:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:54,704 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-07 11:32:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:32:54,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-07 11:32:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:54,707 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:32:54,707 INFO L226 Difference]: Without dead ends: 44 [2020-07-07 11:32:54,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:32:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-07 11:32:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-07-07 11:32:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 11:32:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-07 11:32:54,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2020-07-07 11:32:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:54,718 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-07 11:32:54,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:32:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-07 11:32:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:32:54,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:54,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:54,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:32:54,936 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:54,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1067646812, now seen corresponding path program 2 times [2020-07-07 11:32:54,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:54,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169949879] [2020-07-07 11:32:54,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:32:55,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169949879] [2020-07-07 11:32:55,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187452005] [2020-07-07 11:32:55,072 INFO L92 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 [2020-07-07 11:32:55,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:32:55,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:55,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:32:55,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:55,174 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:55,179 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-07 11:32:55,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:55,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2020-07-07 11:32:55,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837422800] [2020-07-07 11:32:55,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:32:55,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:32:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:55,222 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-07-07 11:32:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:55,310 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-07 11:32:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:32:55,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-07-07 11:32:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:55,312 INFO L225 Difference]: With dead ends: 50 [2020-07-07 11:32:55,313 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:32:55,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:32:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:32:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:32:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:32:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-07 11:32:55,321 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2020-07-07 11:32:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:55,321 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-07 11:32:55,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:32:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-07 11:32:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:32:55,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:55,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:55,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:55,538 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:55,539 INFO L82 PathProgramCache]: Analyzing trace with hash 939255927, now seen corresponding path program 1 times [2020-07-07 11:32:55,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:55,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460482409] [2020-07-07 11:32:55,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:32:55,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460482409] [2020-07-07 11:32:55,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466181578] [2020-07-07 11:32:55,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:55,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:32:55,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:32:55,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:55,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-07 11:32:55,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692810405] [2020-07-07 11:32:55,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:32:55,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:32:55,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:55,710 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2020-07-07 11:32:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:55,851 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-07-07 11:32:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:32:55,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-07-07 11:32:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:55,853 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:32:55,853 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:32:55,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:32:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:32:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-07-07 11:32:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 11:32:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-07 11:32:55,862 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2020-07-07 11:32:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:55,863 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-07 11:32:55,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:32:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-07 11:32:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:32:55,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:55,864 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1] [2020-07-07 11:32:56,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:56,079 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1936372809, now seen corresponding path program 2 times [2020-07-07 11:32:56,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:56,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043987849] [2020-07-07 11:32:56,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 11:32:56,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043987849] [2020-07-07 11:32:56,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716247110] [2020-07-07 11:32:56,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:56,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:32:56,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:56,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 11:32:56,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:56,277 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-07-07 11:32:56,278 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:32:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-07 11:32:56,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:32:56,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-07-07 11:32:56,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619663909] [2020-07-07 11:32:56,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:32:56,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:32:56,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:32:56,304 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2020-07-07 11:32:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:56,325 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-07 11:32:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:32:56,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-07 11:32:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:56,326 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:32:56,327 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:32:56,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:32:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:32:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:32:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:32:56,329 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-07-07 11:32:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:56,329 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:32:56,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:32:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:32:56,330 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:32:56,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:56,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:32:56,647 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:32:56,647 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-07 11:32:56,647 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:32:56,648 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:32:56,648 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:32:56,648 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:32:56,648 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:32:56,648 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:32:56,649 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-07 11:32:56,649 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:32:56,649 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:32:56,649 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-07-07 11:32:56,649 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-07 11:32:56,649 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-07 11:32:56,650 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-07-07 11:32:56,650 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-07 11:32:56,650 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-07 11:32:56,650 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-07 11:32:56,651 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (= 1 main_~found~0) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0)) (= 0 main_~found~0)) [2020-07-07 11:32:56,651 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-07 11:32:56,651 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-07 11:32:56,651 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-07-07 11:32:56,651 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-07 11:32:56,651 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-07 11:32:56,652 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-07 11:32:56,652 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-07 11:32:56,652 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-07 11:32:56,652 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-07-07 11:32:56,652 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-07 11:32:56,652 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-07 11:32:56,653 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-07-07 11:32:56,653 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-07 11:32:56,653 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-07 11:32:56,653 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-07 11:32:56,653 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-07 11:32:56,654 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-07 11:32:56,654 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-07 11:32:56,654 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-07 11:32:56,654 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-07 11:32:56,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:32:56 BoogieIcfgContainer [2020-07-07 11:32:56,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:32:56,676 INFO L168 Benchmark]: Toolchain (without parser) took 3926.95 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 102.9 MB in the beginning and 88.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:56,677 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:32:56,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.52 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 91.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:56,679 INFO L168 Benchmark]: Boogie Preprocessor took 139.04 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 180.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:56,680 INFO L168 Benchmark]: RCFGBuilder took 428.93 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 160.2 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:56,681 INFO L168 Benchmark]: TraceAbstraction took 3022.47 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 159.5 MB in the beginning and 88.6 MB in the end (delta: 70.9 MB). Peak memory consumption was 103.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:56,685 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.52 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 91.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.04 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 180.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.93 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 160.2 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3022.47 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 159.5 MB in the beginning and 88.6 MB in the end (delta: 70.9 MB). Peak memory consumption was 103.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (1 == found || (0 <= j && nc_B <= 0)) || 0 == found - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 78 SDslu, 304 SDs, 0 SdLazy, 250 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, 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, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 30 NumberOfFragments, 65 HoareAnnotationTreeSize, 16 FomulaSimplifications, 87 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 286 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 277 ConstructedInterpolants, 0 QuantifiedInterpolants, 13046 SizeOfPredicates, 10 NumberOfNonLiveVariables, 389 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 57/80 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...