/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/psyco/psyco_security.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:41:38,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:41:38,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:41:38,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:41:38,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:41:38,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:41:38,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:41:38,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:41:38,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:41:38,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:41:38,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:41:38,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:41:38,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:41:38,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:41:38,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:41:38,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:41:38,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:41:38,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:41:38,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:41:38,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:41:38,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:41:38,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:41:38,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:41:38,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:41:38,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:41:38,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:41:38,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:41:38,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:41:38,573 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 [2020-07-20 11:41:38,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:41:38,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:41:38,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:41:38,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:41:38,596 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:41:38,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:41:38,597 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:41:38,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:41:38,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:41:38,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:41:38,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:41:38,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:41:38,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:41:38,598 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:41:38,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:41:38,599 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:41:38,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:41:38,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:41:38,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:41:38,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:41:38,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:41:38,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:41:38,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:41:38,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:41:38,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:41:38,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:41:38,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:38,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:41:38,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:41:38,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:41:38,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:41:38,892 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:41:38,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:41:38,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:41:38,897 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:41:38,898 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_security.c [2020-07-20 11:41:38,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cef2cf32/920b903a558c4ca7bd7ea17646e5cf1b/FLAG324916af2 [2020-07-20 11:41:39,513 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:41:39,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_security.c [2020-07-20 11:41:39,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cef2cf32/920b903a558c4ca7bd7ea17646e5cf1b/FLAG324916af2 [2020-07-20 11:41:39,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cef2cf32/920b903a558c4ca7bd7ea17646e5cf1b [2020-07-20 11:41:39,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:41:39,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:41:39,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:41:39,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:41:39,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:41:39,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:41:39" (1/1) ... [2020-07-20 11:41:39,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b433ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:39, skipping insertion in model container [2020-07-20 11:41:39,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:41:39" (1/1) ... [2020-07-20 11:41:39,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:41:39,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:41:40,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:41:40,145 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:41:40,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:41:40,289 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:41:40,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40 WrapperNode [2020-07-20 11:41:40,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:41:40,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:41:40,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:41:40,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:41:40,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (1/1) ... [2020-07-20 11:41:40,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:41:40,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:41:40,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:41:40,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:41:40,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (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 [2020-07-20 11:41:40,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:41:40,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:41:40,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:41:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:41:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:41:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:41:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:41:40,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:41:40,926 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:41:40,927 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-20 11:41:40,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:41:40 BoogieIcfgContainer [2020-07-20 11:41:40,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:41:40,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:41:40,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:41:40,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:41:40,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:41:39" (1/3) ... [2020-07-20 11:41:40,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2057e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:41:40, skipping insertion in model container [2020-07-20 11:41:40,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:41:40" (2/3) ... [2020-07-20 11:41:40,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2057e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:41:40, skipping insertion in model container [2020-07-20 11:41:40,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:41:40" (3/3) ... [2020-07-20 11:41:40,945 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_security.c [2020-07-20 11:41:40,960 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:41:40,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:41:40,985 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:41:41,008 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:41:41,008 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:41:41,008 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:41:41,009 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:41:41,009 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:41:41,009 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:41:41,009 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:41:41,009 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:41:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-07-20 11:41:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:41:41,035 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:41,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:41:41,037 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:41,043 INFO L82 PathProgramCache]: Analyzing trace with hash -105811556, now seen corresponding path program 1 times [2020-07-20 11:41:41,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:41,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771544121] [2020-07-20 11:41:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:41,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:41:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:41:41,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:41,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771544121] [2020-07-20 11:41:41,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:41,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:41:41,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415811175] [2020-07-20 11:41:41,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:41:41,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:41:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:41:41,180 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 2 states. [2020-07-20 11:41:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:41,216 INFO L93 Difference]: Finished difference Result 160 states and 298 transitions. [2020-07-20 11:41:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:41:41,218 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-20 11:41:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:41,231 INFO L225 Difference]: With dead ends: 160 [2020-07-20 11:41:41,232 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 11:41:41,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:41:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 11:41:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-20 11:41:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 11:41:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 113 transitions. [2020-07-20 11:41:41,285 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 113 transitions. Word has length 13 [2020-07-20 11:41:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:41,286 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 113 transitions. [2020-07-20 11:41:41,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:41:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 113 transitions. [2020-07-20 11:41:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:41:41,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:41,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:41:41,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:41,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1547300989, now seen corresponding path program 1 times [2020-07-20 11:41:41,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:41,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427752775] [2020-07-20 11:41:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:41:41,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:41,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427752775] [2020-07-20 11:41:41,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:41,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:41,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942885141] [2020-07-20 11:41:41,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:41,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:41,592 INFO L87 Difference]: Start difference. First operand 78 states and 113 transitions. Second operand 3 states. [2020-07-20 11:41:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:41,806 INFO L93 Difference]: Finished difference Result 222 states and 327 transitions. [2020-07-20 11:41:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:41,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 11:41:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:41,809 INFO L225 Difference]: With dead ends: 222 [2020-07-20 11:41:41,809 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 11:41:41,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 11:41:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 118. [2020-07-20 11:41:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-20 11:41:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 171 transitions. [2020-07-20 11:41:41,827 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 171 transitions. Word has length 14 [2020-07-20 11:41:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:41,827 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 171 transitions. [2020-07-20 11:41:41,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 171 transitions. [2020-07-20 11:41:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 11:41:41,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:41,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:41:42,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:42,044 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash 462382459, now seen corresponding path program 1 times [2020-07-20 11:41:42,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:42,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404646430] [2020-07-20 11:41:42,047 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:42,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:41:42,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:42,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404646430] [2020-07-20 11:41:42,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:42,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:42,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101031739] [2020-07-20 11:41:42,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:42,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:42,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:42,124 INFO L87 Difference]: Start difference. First operand 118 states and 171 transitions. Second operand 3 states. [2020-07-20 11:41:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:42,206 INFO L93 Difference]: Finished difference Result 244 states and 360 transitions. [2020-07-20 11:41:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:42,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 11:41:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:42,208 INFO L225 Difference]: With dead ends: 244 [2020-07-20 11:41:42,209 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 11:41:42,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 11:41:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-07-20 11:41:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-20 11:41:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 177 transitions. [2020-07-20 11:41:42,222 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 177 transitions. Word has length 18 [2020-07-20 11:41:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:42,222 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 177 transitions. [2020-07-20 11:41:42,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 177 transitions. [2020-07-20 11:41:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 11:41:42,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:42,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:41:42,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:42,439 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1531598883, now seen corresponding path program 1 times [2020-07-20 11:41:42,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:42,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620700592] [2020-07-20 11:41:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:41:42,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:42,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620700592] [2020-07-20 11:41:42,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:42,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:42,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075027777] [2020-07-20 11:41:42,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:42,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:42,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:42,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:42,501 INFO L87 Difference]: Start difference. First operand 124 states and 177 transitions. Second operand 3 states. [2020-07-20 11:41:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:42,571 INFO L93 Difference]: Finished difference Result 227 states and 327 transitions. [2020-07-20 11:41:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:42,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 11:41:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:42,573 INFO L225 Difference]: With dead ends: 227 [2020-07-20 11:41:42,574 INFO L226 Difference]: Without dead ends: 109 [2020-07-20 11:41:42,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-20 11:41:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-07-20 11:41:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 11:41:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-07-20 11:41:42,591 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 23 [2020-07-20 11:41:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:42,592 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-07-20 11:41:42,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-07-20 11:41:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:41:42,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:42,594 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:41:42,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:42,795 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1559438635, now seen corresponding path program 1 times [2020-07-20 11:41:42,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:42,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773602738] [2020-07-20 11:41:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:41:42,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:42,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773602738] [2020-07-20 11:41:42,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:42,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:42,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927466473] [2020-07-20 11:41:42,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:42,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:42,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:42,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:42,845 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 3 states. [2020-07-20 11:41:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:42,895 INFO L93 Difference]: Finished difference Result 181 states and 258 transitions. [2020-07-20 11:41:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:42,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 11:41:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:42,898 INFO L225 Difference]: With dead ends: 181 [2020-07-20 11:41:42,898 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 11:41:42,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 11:41:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-07-20 11:41:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 11:41:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 110 transitions. [2020-07-20 11:41:42,906 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 110 transitions. Word has length 26 [2020-07-20 11:41:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:42,907 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 110 transitions. [2020-07-20 11:41:42,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 110 transitions. [2020-07-20 11:41:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:41:42,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:42,908 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-20 11:41:43,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:43,118 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -31288535, now seen corresponding path program 1 times [2020-07-20 11:41:43,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:43,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699881638] [2020-07-20 11:41:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:41:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:41:43,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:43,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699881638] [2020-07-20 11:41:43,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:43,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:43,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665026809] [2020-07-20 11:41:43,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:43,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:43,176 INFO L87 Difference]: Start difference. First operand 80 states and 110 transitions. Second operand 3 states. [2020-07-20 11:41:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:43,259 INFO L93 Difference]: Finished difference Result 168 states and 242 transitions. [2020-07-20 11:41:43,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:43,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 11:41:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:43,261 INFO L225 Difference]: With dead ends: 168 [2020-07-20 11:41:43,261 INFO L226 Difference]: Without dead ends: 121 [2020-07-20 11:41:43,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-20 11:41:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2020-07-20 11:41:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 11:41:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 152 transitions. [2020-07-20 11:41:43,285 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 152 transitions. Word has length 30 [2020-07-20 11:41:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:43,288 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 152 transitions. [2020-07-20 11:41:43,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 152 transitions. [2020-07-20 11:41:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:41:43,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:43,290 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-20 11:41:43,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:43,490 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash 180888733, now seen corresponding path program 1 times [2020-07-20 11:41:43,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:43,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746795556] [2020-07-20 11:41:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:41:43,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:43,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746795556] [2020-07-20 11:41:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:43,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:43,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479200658] [2020-07-20 11:41:43,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:43,541 INFO L87 Difference]: Start difference. First operand 109 states and 152 transitions. Second operand 3 states. [2020-07-20 11:41:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:43,604 INFO L93 Difference]: Finished difference Result 176 states and 246 transitions. [2020-07-20 11:41:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:43,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 11:41:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:43,606 INFO L225 Difference]: With dead ends: 176 [2020-07-20 11:41:43,607 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 11:41:43,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 11:41:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-20 11:41:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 11:41:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2020-07-20 11:41:43,618 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 31 [2020-07-20 11:41:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:43,619 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2020-07-20 11:41:43,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2020-07-20 11:41:43,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:41:43,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:43,620 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-07-20 11:41:43,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:43,834 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash 317242888, now seen corresponding path program 1 times [2020-07-20 11:41:43,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:43,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737046268] [2020-07-20 11:41:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:43,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:43,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:41:43,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:43,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737046268] [2020-07-20 11:41:43,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:43,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:43,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887039848] [2020-07-20 11:41:43,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:43,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:43,892 INFO L87 Difference]: Start difference. First operand 102 states and 134 transitions. Second operand 3 states. [2020-07-20 11:41:43,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:43,972 INFO L93 Difference]: Finished difference Result 151 states and 201 transitions. [2020-07-20 11:41:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:43,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 11:41:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:43,975 INFO L225 Difference]: With dead ends: 151 [2020-07-20 11:41:43,975 INFO L226 Difference]: Without dead ends: 84 [2020-07-20 11:41:43,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-20 11:41:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-20 11:41:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 11:41:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-07-20 11:41:43,985 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 31 [2020-07-20 11:41:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:43,986 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-07-20 11:41:43,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-07-20 11:41:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 11:41:43,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:43,988 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1] [2020-07-20 11:41:44,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:44,203 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:44,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1695196396, now seen corresponding path program 1 times [2020-07-20 11:41:44,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:44,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904569552] [2020-07-20 11:41:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:41:44,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:41:44,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904569552] [2020-07-20 11:41:44,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:44,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:44,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173263840] [2020-07-20 11:41:44,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:44,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:44,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:44,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:44,259 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 3 states. [2020-07-20 11:41:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:44,299 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2020-07-20 11:41:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:44,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-07-20 11:41:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:44,301 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:41:44,301 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 11:41:44,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 11:41:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-07-20 11:41:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-20 11:41:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2020-07-20 11:41:44,308 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 32 [2020-07-20 11:41:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:44,308 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2020-07-20 11:41:44,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2020-07-20 11:41:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:41:44,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:41:44,310 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-07-20 11:41:44,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:44,525 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:41:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:41:44,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1000030502, now seen corresponding path program 1 times [2020-07-20 11:41:44,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:41:44,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195161871] [2020-07-20 11:41:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:41:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:41:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:41:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:41:44,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:41:44,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195161871] [2020-07-20 11:41:44,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:41:44,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:41:44,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231713030] [2020-07-20 11:41:44,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:41:44,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:41:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:41:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:44,579 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 3 states. [2020-07-20 11:41:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:41:44,623 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2020-07-20 11:41:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:41:44,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-20 11:41:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:41:44,625 INFO L225 Difference]: With dead ends: 125 [2020-07-20 11:41:44,625 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:41:44,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:41:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:41:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:41:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:41:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:41:44,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-20 11:41:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:41:44,627 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:41:44,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:41:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:41:44,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:41:44,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:41:44,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:41:45,027 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:41:45,027 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:41:45,028 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:41:45,028 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:41:45,028 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:41:45,028 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:41:45,028 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L316(lines 316 331) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L283(lines 283 382) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L250(lines 250 261) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 390) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L184(lines 184 199) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L118(lines 118 129) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L366(lines 366 377) no Hoare annotation was computed. [2020-07-20 11:41:45,029 INFO L268 CegarLoopResult]: For program point L300(lines 300 315) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L234(lines 234 245) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L102(lines 102 113) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L350(lines 350 361) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L284(lines 284 299) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L218(lines 218 229) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L86(lines 86 88) no Hoare annotation was computed. [2020-07-20 11:41:45,030 INFO L268 CegarLoopResult]: For program point L334(lines 334 345) no Hoare annotation was computed. [2020-07-20 11:41:45,031 INFO L268 CegarLoopResult]: For program point L202(lines 202 213) no Hoare annotation was computed. [2020-07-20 11:41:45,031 INFO L268 CegarLoopResult]: For program point L70(lines 70 72) no Hoare annotation was computed. [2020-07-20 11:41:45,031 INFO L268 CegarLoopResult]: For program point L318(lines 318 329) no Hoare annotation was computed. [2020-07-20 11:41:45,031 INFO L268 CegarLoopResult]: For program point L186(lines 186 197) no Hoare annotation was computed. [2020-07-20 11:41:45,031 INFO L268 CegarLoopResult]: For program point L54(lines 54 56) no Hoare annotation was computed. [2020-07-20 11:41:45,031 INFO L268 CegarLoopResult]: For program point L302(lines 302 313) no Hoare annotation was computed. [2020-07-20 11:41:45,032 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 390) no Hoare annotation was computed. [2020-07-20 11:41:45,032 INFO L268 CegarLoopResult]: For program point L170(lines 170 172) no Hoare annotation was computed. [2020-07-20 11:41:45,032 INFO L268 CegarLoopResult]: For program point L286(lines 286 297) no Hoare annotation was computed. [2020-07-20 11:41:45,032 INFO L268 CegarLoopResult]: For program point L154(lines 154 156) no Hoare annotation was computed. [2020-07-20 11:41:45,032 INFO L264 CegarLoopResult]: At program point L22-2(lines 22 385) the Hoare annotation is: (or (and (<= main_~q~0 2) (<= main_~this_state~0 0)) (and (<= 3 main_~q~0) (= 2 main_~this_state~0) (<= main_~q~0 3)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)) (<= main_~q~0 0)) [2020-07-20 11:41:45,033 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 385) no Hoare annotation was computed. [2020-07-20 11:41:45,033 INFO L268 CegarLoopResult]: For program point L270(lines 270 272) no Hoare annotation was computed. [2020-07-20 11:41:45,033 INFO L268 CegarLoopResult]: For program point L138(lines 138 140) no Hoare annotation was computed. [2020-07-20 11:41:45,033 INFO L268 CegarLoopResult]: For program point L254(lines 254 256) no Hoare annotation was computed. [2020-07-20 11:41:45,033 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-20 11:41:45,033 INFO L268 CegarLoopResult]: For program point L370(lines 370 372) no Hoare annotation was computed. [2020-07-20 11:41:45,034 INFO L268 CegarLoopResult]: For program point L238(lines 238 240) no Hoare annotation was computed. [2020-07-20 11:41:45,034 INFO L268 CegarLoopResult]: For program point L106(lines 106 108) no Hoare annotation was computed. [2020-07-20 11:41:45,034 INFO L268 CegarLoopResult]: For program point L354(lines 354 356) no Hoare annotation was computed. [2020-07-20 11:41:45,034 INFO L268 CegarLoopResult]: For program point L222(lines 222 224) no Hoare annotation was computed. [2020-07-20 11:41:45,034 INFO L264 CegarLoopResult]: At program point L371(lines 13 390) the Hoare annotation is: false [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L338(lines 338 340) no Hoare annotation was computed. [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L206(lines 206 208) no Hoare annotation was computed. [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L322(lines 322 324) no Hoare annotation was computed. [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L190(lines 190 192) no Hoare annotation was computed. [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L306(lines 306 308) no Hoare annotation was computed. [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L290(lines 290 292) no Hoare annotation was computed. [2020-07-20 11:41:45,035 INFO L268 CegarLoopResult]: For program point L27(lines 27 46) no Hoare annotation was computed. [2020-07-20 11:41:45,036 INFO L268 CegarLoopResult]: For program point L28(lines 28 43) no Hoare annotation was computed. [2020-07-20 11:41:45,036 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 389) no Hoare annotation was computed. [2020-07-20 11:41:45,036 INFO L268 CegarLoopResult]: For program point L30(lines 30 41) no Hoare annotation was computed. [2020-07-20 11:41:45,036 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 390) the Hoare annotation is: true [2020-07-20 11:41:45,036 INFO L268 CegarLoopResult]: For program point L80(lines 80 95) no Hoare annotation was computed. [2020-07-20 11:41:45,036 INFO L268 CegarLoopResult]: For program point L47(lines 47 98) no Hoare annotation was computed. [2020-07-20 11:41:45,037 INFO L268 CegarLoopResult]: For program point L64(lines 64 79) no Hoare annotation was computed. [2020-07-20 11:41:45,037 INFO L268 CegarLoopResult]: For program point L48(lines 48 63) no Hoare annotation was computed. [2020-07-20 11:41:45,037 INFO L268 CegarLoopResult]: For program point L164(lines 164 179) no Hoare annotation was computed. [2020-07-20 11:41:45,037 INFO L268 CegarLoopResult]: For program point L148(lines 148 163) no Hoare annotation was computed. [2020-07-20 11:41:45,037 INFO L268 CegarLoopResult]: For program point L82(lines 82 93) no Hoare annotation was computed. [2020-07-20 11:41:45,037 INFO L268 CegarLoopResult]: For program point L264(lines 264 279) no Hoare annotation was computed. [2020-07-20 11:41:45,038 INFO L268 CegarLoopResult]: For program point L132(lines 132 147) no Hoare annotation was computed. [2020-07-20 11:41:45,038 INFO L268 CegarLoopResult]: For program point L99(lines 99 182) no Hoare annotation was computed. [2020-07-20 11:41:45,038 INFO L268 CegarLoopResult]: For program point L66(lines 66 77) no Hoare annotation was computed. [2020-07-20 11:41:45,038 INFO L268 CegarLoopResult]: For program point L248(lines 248 263) no Hoare annotation was computed. [2020-07-20 11:41:45,038 INFO L268 CegarLoopResult]: For program point L116(lines 116 131) no Hoare annotation was computed. [2020-07-20 11:41:45,038 INFO L268 CegarLoopResult]: For program point L50(lines 50 61) no Hoare annotation was computed. [2020-07-20 11:41:45,039 INFO L268 CegarLoopResult]: For program point L364(lines 364 379) no Hoare annotation was computed. [2020-07-20 11:41:45,039 INFO L268 CegarLoopResult]: For program point L232(lines 232 247) no Hoare annotation was computed. [2020-07-20 11:41:45,039 INFO L268 CegarLoopResult]: For program point L166(lines 166 177) no Hoare annotation was computed. [2020-07-20 11:41:45,039 INFO L268 CegarLoopResult]: For program point L100(lines 100 115) no Hoare annotation was computed. [2020-07-20 11:41:45,039 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-07-20 11:41:45,039 INFO L264 CegarLoopResult]: At program point L381(lines 22 385) the Hoare annotation is: (or (and (<= main_~q~0 2) (<= main_~this_state~0 0)) (and (<= 3 main_~q~0) (= 2 main_~this_state~0) (<= main_~q~0 3)) (and (<= 4 main_~q~0) (= 3 main_~this_state~0)) (<= main_~q~0 0)) [2020-07-20 11:41:45,039 INFO L268 CegarLoopResult]: For program point L348(lines 348 363) no Hoare annotation was computed. [2020-07-20 11:41:45,040 INFO L268 CegarLoopResult]: For program point L216(lines 216 231) no Hoare annotation was computed. [2020-07-20 11:41:45,040 INFO L268 CegarLoopResult]: For program point L183(lines 183 282) no Hoare annotation was computed. [2020-07-20 11:41:45,040 INFO L268 CegarLoopResult]: For program point L150(lines 150 161) no Hoare annotation was computed. [2020-07-20 11:41:45,040 INFO L268 CegarLoopResult]: For program point L332(lines 332 347) no Hoare annotation was computed. [2020-07-20 11:41:45,040 INFO L268 CegarLoopResult]: For program point L266(lines 266 277) no Hoare annotation was computed. [2020-07-20 11:41:45,040 INFO L268 CegarLoopResult]: For program point L200(lines 200 215) no Hoare annotation was computed. [2020-07-20 11:41:45,041 INFO L268 CegarLoopResult]: For program point L134(lines 134 145) no Hoare annotation was computed. [2020-07-20 11:41:45,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:41:45 BoogieIcfgContainer [2020-07-20 11:41:45,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:41:45,063 INFO L168 Benchmark]: Toolchain (without parser) took 5209.22 ms. Allocated memory was 146.8 MB in the beginning and 243.3 MB in the end (delta: 96.5 MB). Free memory was 104.3 MB in the beginning and 178.7 MB in the end (delta: -74.4 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:41:45,064 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:41:45,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.15 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 104.1 MB in the beginning and 183.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:41:45,065 INFO L168 Benchmark]: Boogie Preprocessor took 47.86 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:41:45,066 INFO L168 Benchmark]: RCFGBuilder took 593.50 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 152.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:41:45,067 INFO L168 Benchmark]: TraceAbstraction took 4122.34 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 151.5 MB in the beginning and 178.7 MB in the end (delta: -27.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:41:45,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 434.15 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 104.1 MB in the beginning and 183.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 47.86 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 593.50 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 152.2 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4122.34 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 151.5 MB in the beginning and 178.7 MB in the end (delta: -27.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 389]: 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: 22]: Loop Invariant Derived loop invariant: (((q <= 2 && this_state <= 0) || ((3 <= q && 2 == this_state) && q <= 3)) || (4 <= q && 3 == this_state)) || q <= 0 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((q <= 2 && this_state <= 0) || ((3 <= q && 2 == this_state) && q <= 3)) || (4 <= q && 3 == this_state)) || q <= 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 955 SDtfs, 317 SDslu, 466 SDs, 0 SdLazy, 224 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 15 NumberOfFragments, 61 HoareAnnotationTreeSize, 7 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 32 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 251 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 9783 SizeOfPredicates, 7 NumberOfNonLiveVariables, 860 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 49/49 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...