/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 --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:29:57,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:29:57,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:29:57,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:29:57,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:29:57,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:29:57,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:29:57,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:29:57,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:29:57,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:29:57,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:29:57,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:29:57,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:29:57,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:29:57,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:29:57,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:29:57,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:29:57,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:29:57,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:29:57,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:29:57,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:29:57,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:29:57,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:29:57,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:29:57,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:29:57,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:29:57,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:29:57,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:29:57,926 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 [2020-07-19 21:29:57,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:29:57,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:29:57,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:29:57,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:29:57,942 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:29:57,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:29:57,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:29:57,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:29:57,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:29:57,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:29:57,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:29:57,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:29:57,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:29:57,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:29:57,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:29:57,944 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:29:57,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:29:57,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:29:57,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:29:57,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:29:57,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:29:57,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:29:57,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:29:57,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:29:57,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:29:57,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:29:57,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:29:57,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:29:57,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:29:57,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:29:58,245 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:29:58,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:29:58,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:29:58,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:29:58,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:29:58,264 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-07-19 21:29:58,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c3e5552/90253736b01d436aa615bfe1f5d8399f/FLAG7b3cb3634 [2020-07-19 21:29:58,812 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:29:58,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-07-19 21:29:58,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c3e5552/90253736b01d436aa615bfe1f5d8399f/FLAG7b3cb3634 [2020-07-19 21:29:59,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c3e5552/90253736b01d436aa615bfe1f5d8399f [2020-07-19 21:29:59,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:29:59,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:29:59,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:29:59,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:29:59,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:29:59,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef8221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59, skipping insertion in model container [2020-07-19 21:29:59,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:29:59,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:29:59,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:29:59,436 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:29:59,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:29:59,564 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:29:59,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59 WrapperNode [2020-07-19 21:29:59,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:29:59,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:29:59,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:29:59,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:29:59,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (1/1) ... [2020-07-19 21:29:59,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:29:59,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:29:59,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:29:59,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:29:59,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (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 [2020-07-19 21:29:59,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:29:59,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:29:59,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:29:59,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:29:59,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:29:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:29:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:29:59,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:30:00,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:30:00,033 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:30:00,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:30:00 BoogieIcfgContainer [2020-07-19 21:30:00,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:30:00,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:30:00,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:30:00,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:30:00,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:29:59" (1/3) ... [2020-07-19 21:30:00,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631b3776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:30:00, skipping insertion in model container [2020-07-19 21:30:00,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:29:59" (2/3) ... [2020-07-19 21:30:00,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631b3776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:30:00, skipping insertion in model container [2020-07-19 21:30:00,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:30:00" (3/3) ... [2020-07-19 21:30:00,048 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-07-19 21:30:00,060 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:30:00,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:30:00,085 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:30:00,113 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:30:00,113 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:30:00,114 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:30:00,114 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:30:00,114 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:30:00,114 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:30:00,114 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:30:00,114 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:30:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-19 21:30:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 21:30:00,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:00,146 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] [2020-07-19 21:30:00,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-07-19 21:30:00,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:00,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557920503] [2020-07-19 21:30:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:00,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557920503] [2020-07-19 21:30:00,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:00,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:00,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728571911] [2020-07-19 21:30:00,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:00,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:00,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:00,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,432 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-07-19 21:30:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:00,497 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-07-19 21:30:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:00,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-19 21:30:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:00,512 INFO L225 Difference]: With dead ends: 93 [2020-07-19 21:30:00,512 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:30:00,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:30:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-07-19 21:30:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 21:30:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-07-19 21:30:00,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-07-19 21:30:00,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:00,564 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-07-19 21:30:00,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-07-19 21:30:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 21:30:00,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:00,566 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] [2020-07-19 21:30:00,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:30:00,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:00,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-07-19 21:30:00,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:00,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110743293] [2020-07-19 21:30:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110743293] [2020-07-19 21:30:00,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:00,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:00,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159613111] [2020-07-19 21:30:00,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:00,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:00,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:00,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,660 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-07-19 21:30:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:00,708 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-07-19 21:30:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:00,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-19 21:30:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:00,711 INFO L225 Difference]: With dead ends: 127 [2020-07-19 21:30:00,712 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 21:30:00,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 21:30:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-19 21:30:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-19 21:30:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-07-19 21:30:00,727 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-07-19 21:30:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:00,728 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-07-19 21:30:00,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-07-19 21:30:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:30:00,729 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:00,730 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] [2020-07-19 21:30:00,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:30:00,730 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-07-19 21:30:00,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:00,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450020108] [2020-07-19 21:30:00,732 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:00,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450020108] [2020-07-19 21:30:00,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:00,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:00,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265039561] [2020-07-19 21:30:00,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:00,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:00,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,800 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-07-19 21:30:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:00,858 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-19 21:30:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:00,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:30:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:00,864 INFO L225 Difference]: With dead ends: 117 [2020-07-19 21:30:00,864 INFO L226 Difference]: Without dead ends: 81 [2020-07-19 21:30:00,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-19 21:30:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-07-19 21:30:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-19 21:30:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-07-19 21:30:00,890 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-07-19 21:30:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:00,893 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-07-19 21:30:00,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-07-19 21:30:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:30:00,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:00,895 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] [2020-07-19 21:30:00,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 21:30:00,895 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:00,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-07-19 21:30:00,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:00,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346628651] [2020-07-19 21:30:00,899 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:00,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346628651] [2020-07-19 21:30:00,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:00,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:00,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29131073] [2020-07-19 21:30:00,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:00,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:00,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,962 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-07-19 21:30:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:00,983 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-07-19 21:30:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:00,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:30:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:00,986 INFO L225 Difference]: With dead ends: 148 [2020-07-19 21:30:00,986 INFO L226 Difference]: Without dead ends: 146 [2020-07-19 21:30:00,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-19 21:30:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-07-19 21:30:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-19 21:30:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-07-19 21:30:01,001 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-07-19 21:30:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,001 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-07-19 21:30:01,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-07-19 21:30:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:30:01,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,003 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] [2020-07-19 21:30:01,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 21:30:01,004 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-07-19 21:30:01,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433392411] [2020-07-19 21:30:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433392411] [2020-07-19 21:30:01,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905948331] [2020-07-19 21:30:01,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,060 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-07-19 21:30:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,097 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-07-19 21:30:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:30:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,099 INFO L225 Difference]: With dead ends: 244 [2020-07-19 21:30:01,100 INFO L226 Difference]: Without dead ends: 148 [2020-07-19 21:30:01,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-19 21:30:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-07-19 21:30:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-19 21:30:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-07-19 21:30:01,134 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-07-19 21:30:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,134 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-07-19 21:30:01,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-07-19 21:30:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-19 21:30:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,139 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] [2020-07-19 21:30:01,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 21:30:01,140 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-07-19 21:30:01,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701862419] [2020-07-19 21:30:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701862419] [2020-07-19 21:30:01,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941072962] [2020-07-19 21:30:01,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,235 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-07-19 21:30:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,262 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-07-19 21:30:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-19 21:30:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,265 INFO L225 Difference]: With dead ends: 219 [2020-07-19 21:30:01,277 INFO L226 Difference]: Without dead ends: 150 [2020-07-19 21:30:01,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-19 21:30:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-07-19 21:30:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-19 21:30:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-07-19 21:30:01,293 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-07-19 21:30:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,293 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-07-19 21:30:01,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-07-19 21:30:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-19 21:30:01,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,295 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] [2020-07-19 21:30:01,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 21:30:01,295 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-07-19 21:30:01,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786417502] [2020-07-19 21:30:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786417502] [2020-07-19 21:30:01,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72064533] [2020-07-19 21:30:01,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,332 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-07-19 21:30:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,356 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-07-19 21:30:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-19 21:30:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,359 INFO L225 Difference]: With dead ends: 276 [2020-07-19 21:30:01,360 INFO L226 Difference]: Without dead ends: 274 [2020-07-19 21:30:01,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-19 21:30:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-07-19 21:30:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-19 21:30:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-07-19 21:30:01,374 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-07-19 21:30:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,374 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-07-19 21:30:01,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-07-19 21:30:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-19 21:30:01,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,376 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] [2020-07-19 21:30:01,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-19 21:30:01,377 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-07-19 21:30:01,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265804399] [2020-07-19 21:30:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265804399] [2020-07-19 21:30:01,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960488282] [2020-07-19 21:30:01,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,420 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-07-19 21:30:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,466 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-07-19 21:30:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-19 21:30:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,469 INFO L225 Difference]: With dead ends: 472 [2020-07-19 21:30:01,469 INFO L226 Difference]: Without dead ends: 282 [2020-07-19 21:30:01,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-19 21:30:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-07-19 21:30:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-19 21:30:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-07-19 21:30:01,501 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-07-19 21:30:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,501 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-07-19 21:30:01,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-07-19 21:30:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:30:01,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,503 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] [2020-07-19 21:30:01,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 21:30:01,504 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-07-19 21:30:01,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399096421] [2020-07-19 21:30:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399096421] [2020-07-19 21:30:01,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656688559] [2020-07-19 21:30:01,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,568 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-07-19 21:30:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,601 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-07-19 21:30:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-19 21:30:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,605 INFO L225 Difference]: With dead ends: 420 [2020-07-19 21:30:01,606 INFO L226 Difference]: Without dead ends: 286 [2020-07-19 21:30:01,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-19 21:30:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-07-19 21:30:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-19 21:30:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-07-19 21:30:01,627 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-07-19 21:30:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,628 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-07-19 21:30:01,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-07-19 21:30:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:30:01,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,631 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] [2020-07-19 21:30:01,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-19 21:30:01,632 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,632 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-07-19 21:30:01,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393333351] [2020-07-19 21:30:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393333351] [2020-07-19 21:30:01,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130726283] [2020-07-19 21:30:01,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,696 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-07-19 21:30:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,729 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-07-19 21:30:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-19 21:30:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,733 INFO L225 Difference]: With dead ends: 524 [2020-07-19 21:30:01,733 INFO L226 Difference]: Without dead ends: 522 [2020-07-19 21:30:01,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-07-19 21:30:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-07-19 21:30:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-19 21:30:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-07-19 21:30:01,752 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-07-19 21:30:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,755 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-07-19 21:30:01,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-07-19 21:30:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:30:01,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,756 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] [2020-07-19 21:30:01,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-19 21:30:01,757 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-07-19 21:30:01,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740039421] [2020-07-19 21:30:01,758 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740039421] [2020-07-19 21:30:01,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766124036] [2020-07-19 21:30:01,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,811 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-07-19 21:30:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,852 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-07-19 21:30:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-19 21:30:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,857 INFO L225 Difference]: With dead ends: 924 [2020-07-19 21:30:01,857 INFO L226 Difference]: Without dead ends: 546 [2020-07-19 21:30:01,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-07-19 21:30:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-07-19 21:30:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-07-19 21:30:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-07-19 21:30:01,880 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-07-19 21:30:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,881 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-07-19 21:30:01,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-07-19 21:30:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:30:01,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,885 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] [2020-07-19 21:30:01,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 21:30:01,885 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-07-19 21:30:01,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121994378] [2020-07-19 21:30:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:01,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121994378] [2020-07-19 21:30:01,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:01,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:01,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013784630] [2020-07-19 21:30:01,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:01,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:01,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,932 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-07-19 21:30:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:01,959 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-07-19 21:30:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:01,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-19 21:30:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:01,964 INFO L225 Difference]: With dead ends: 816 [2020-07-19 21:30:01,964 INFO L226 Difference]: Without dead ends: 554 [2020-07-19 21:30:01,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:01,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-07-19 21:30:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-07-19 21:30:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-07-19 21:30:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-07-19 21:30:01,984 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-07-19 21:30:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:01,984 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-07-19 21:30:01,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-07-19 21:30:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:30:01,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:01,986 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] [2020-07-19 21:30:01,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-19 21:30:01,987 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-07-19 21:30:01,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:01,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516396846] [2020-07-19 21:30:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516396846] [2020-07-19 21:30:02,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73513500] [2020-07-19 21:30:02,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,014 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-07-19 21:30:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,041 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-07-19 21:30:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-19 21:30:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:02,047 INFO L225 Difference]: With dead ends: 1004 [2020-07-19 21:30:02,048 INFO L226 Difference]: Without dead ends: 1002 [2020-07-19 21:30:02,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-07-19 21:30:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-07-19 21:30:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-19 21:30:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-07-19 21:30:02,079 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-07-19 21:30:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:02,079 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-07-19 21:30:02,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-07-19 21:30:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 21:30:02,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:02,082 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] [2020-07-19 21:30:02,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-19 21:30:02,082 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:02,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-07-19 21:30:02,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:02,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100068208] [2020-07-19 21:30:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100068208] [2020-07-19 21:30:02,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762138711] [2020-07-19 21:30:02,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,111 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-07-19 21:30:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,145 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-07-19 21:30:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-19 21:30:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:02,152 INFO L225 Difference]: With dead ends: 1820 [2020-07-19 21:30:02,152 INFO L226 Difference]: Without dead ends: 1066 [2020-07-19 21:30:02,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-07-19 21:30:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-07-19 21:30:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-07-19 21:30:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-07-19 21:30:02,191 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-07-19 21:30:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:02,191 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-07-19 21:30:02,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-07-19 21:30:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:30:02,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:02,194 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] [2020-07-19 21:30:02,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-19 21:30:02,194 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-07-19 21:30:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:02,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103425954] [2020-07-19 21:30:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103425954] [2020-07-19 21:30:02,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465225606] [2020-07-19 21:30:02,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,234 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-07-19 21:30:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,261 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-07-19 21:30:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-19 21:30:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:02,268 INFO L225 Difference]: With dead ends: 1596 [2020-07-19 21:30:02,268 INFO L226 Difference]: Without dead ends: 1082 [2020-07-19 21:30:02,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-07-19 21:30:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-07-19 21:30:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-07-19 21:30:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-07-19 21:30:02,305 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-07-19 21:30:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:02,305 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-07-19 21:30:02,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-07-19 21:30:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:30:02,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:02,308 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] [2020-07-19 21:30:02,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-19 21:30:02,308 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-07-19 21:30:02,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:02,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095262495] [2020-07-19 21:30:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095262495] [2020-07-19 21:30:02,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637649927] [2020-07-19 21:30:02,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,334 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-07-19 21:30:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,376 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-07-19 21:30:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,377 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-19 21:30:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:02,387 INFO L225 Difference]: With dead ends: 1932 [2020-07-19 21:30:02,388 INFO L226 Difference]: Without dead ends: 1930 [2020-07-19 21:30:02,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-19 21:30:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-07-19 21:30:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-19 21:30:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-07-19 21:30:02,451 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-07-19 21:30:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:02,452 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-07-19 21:30:02,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-07-19 21:30:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:30:02,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:02,456 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] [2020-07-19 21:30:02,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-19 21:30:02,456 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:02,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-07-19 21:30:02,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:02,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144455369] [2020-07-19 21:30:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144455369] [2020-07-19 21:30:02,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520375859] [2020-07-19 21:30:02,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,486 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-07-19 21:30:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,555 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-07-19 21:30:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-19 21:30:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:02,568 INFO L225 Difference]: With dead ends: 3596 [2020-07-19 21:30:02,568 INFO L226 Difference]: Without dead ends: 2090 [2020-07-19 21:30:02,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-07-19 21:30:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-07-19 21:30:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-07-19 21:30:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-07-19 21:30:02,667 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-07-19 21:30:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:02,668 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-07-19 21:30:02,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:02,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-07-19 21:30:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 21:30:02,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:02,675 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] [2020-07-19 21:30:02,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-19 21:30:02,675 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-07-19 21:30:02,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:02,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448760816] [2020-07-19 21:30:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448760816] [2020-07-19 21:30:02,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094791651] [2020-07-19 21:30:02,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,704 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-07-19 21:30:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,758 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-07-19 21:30:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-19 21:30:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:02,768 INFO L225 Difference]: With dead ends: 3132 [2020-07-19 21:30:02,769 INFO L226 Difference]: Without dead ends: 2122 [2020-07-19 21:30:02,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-07-19 21:30:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-07-19 21:30:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-07-19 21:30:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-07-19 21:30:02,849 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-07-19 21:30:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:02,849 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-07-19 21:30:02,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-07-19 21:30:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 21:30:02,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:02,853 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] [2020-07-19 21:30:02,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-19 21:30:02,854 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-07-19 21:30:02,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:02,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038244376] [2020-07-19 21:30:02,891 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:02,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038244376] [2020-07-19 21:30:02,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:02,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:02,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2155262] [2020-07-19 21:30:02,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:02,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:02,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:02,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:02,915 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-07-19 21:30:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:02,983 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-07-19 21:30:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:02,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-19 21:30:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:03,002 INFO L225 Difference]: With dead ends: 3724 [2020-07-19 21:30:03,003 INFO L226 Difference]: Without dead ends: 3722 [2020-07-19 21:30:03,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-19 21:30:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-07-19 21:30:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-07-19 21:30:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-07-19 21:30:03,096 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-07-19 21:30:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:03,096 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-07-19 21:30:03,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-07-19 21:30:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 21:30:03,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:03,102 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] [2020-07-19 21:30:03,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-19 21:30:03,103 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-07-19 21:30:03,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:03,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080338445] [2020-07-19 21:30:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:03,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080338445] [2020-07-19 21:30:03,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:03,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:03,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151610762] [2020-07-19 21:30:03,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:03,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:03,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,126 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-07-19 21:30:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:03,198 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-07-19 21:30:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:03,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-19 21:30:03,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:03,219 INFO L225 Difference]: With dead ends: 7116 [2020-07-19 21:30:03,219 INFO L226 Difference]: Without dead ends: 4106 [2020-07-19 21:30:03,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-07-19 21:30:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-07-19 21:30:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-07-19 21:30:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-07-19 21:30:03,373 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-07-19 21:30:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:03,374 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-07-19 21:30:03,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-07-19 21:30:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:30:03,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:03,380 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] [2020-07-19 21:30:03,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-19 21:30:03,383 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-07-19 21:30:03,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:03,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320171387] [2020-07-19 21:30:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:03,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320171387] [2020-07-19 21:30:03,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:03,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:03,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578057023] [2020-07-19 21:30:03,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:03,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,438 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-07-19 21:30:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:03,509 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-07-19 21:30:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:03,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-19 21:30:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:03,533 INFO L225 Difference]: With dead ends: 6156 [2020-07-19 21:30:03,533 INFO L226 Difference]: Without dead ends: 4170 [2020-07-19 21:30:03,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-07-19 21:30:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-07-19 21:30:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-07-19 21:30:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-07-19 21:30:03,671 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-07-19 21:30:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:03,672 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-07-19 21:30:03,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-07-19 21:30:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:30:03,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:03,678 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] [2020-07-19 21:30:03,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-19 21:30:03,679 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-07-19 21:30:03,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:03,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382768918] [2020-07-19 21:30:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:03,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382768918] [2020-07-19 21:30:03,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:03,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:03,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863976152] [2020-07-19 21:30:03,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:03,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,706 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-07-19 21:30:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:03,821 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-07-19 21:30:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:03,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-19 21:30:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:03,840 INFO L225 Difference]: With dead ends: 12108 [2020-07-19 21:30:03,841 INFO L226 Difference]: Without dead ends: 8074 [2020-07-19 21:30:03,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-19 21:30:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-07-19 21:30:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-19 21:30:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-07-19 21:30:04,150 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-07-19 21:30:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:04,150 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-07-19 21:30:04,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-07-19 21:30:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:30:04,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:04,161 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] [2020-07-19 21:30:04,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-19 21:30:04,161 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:04,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:04,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-07-19 21:30:04,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:04,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968598698] [2020-07-19 21:30:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:04,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968598698] [2020-07-19 21:30:04,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:04,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:04,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902340485] [2020-07-19 21:30:04,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:04,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:04,186 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-07-19 21:30:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:04,306 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-07-19 21:30:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:04,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-19 21:30:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:04,325 INFO L225 Difference]: With dead ends: 9100 [2020-07-19 21:30:04,325 INFO L226 Difference]: Without dead ends: 9098 [2020-07-19 21:30:04,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-07-19 21:30:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-07-19 21:30:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-19 21:30:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-07-19 21:30:04,522 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-07-19 21:30:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:04,523 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-07-19 21:30:04,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-07-19 21:30:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 21:30:04,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:04,533 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, 1] [2020-07-19 21:30:04,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-19 21:30:04,534 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-07-19 21:30:04,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:04,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362247101] [2020-07-19 21:30:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:04,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362247101] [2020-07-19 21:30:04,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:04,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:04,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484033656] [2020-07-19 21:30:04,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:04,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:04,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:04,557 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-07-19 21:30:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:04,774 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-07-19 21:30:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:04,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-19 21:30:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:04,799 INFO L225 Difference]: With dead ends: 13708 [2020-07-19 21:30:04,799 INFO L226 Difference]: Without dead ends: 13706 [2020-07-19 21:30:04,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-07-19 21:30:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-07-19 21:30:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-07-19 21:30:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-07-19 21:30:05,076 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-07-19 21:30:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:05,077 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-07-19 21:30:05,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-07-19 21:30:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 21:30:05,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:05,099 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, 1] [2020-07-19 21:30:05,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-19 21:30:05,099 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-07-19 21:30:05,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:05,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800650127] [2020-07-19 21:30:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:05,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800650127] [2020-07-19 21:30:05,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:05,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:05,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290904516] [2020-07-19 21:30:05,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:05,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:05,128 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-07-19 21:30:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:05,458 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-07-19 21:30:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:05,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-19 21:30:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:05,495 INFO L225 Difference]: With dead ends: 27788 [2020-07-19 21:30:05,495 INFO L226 Difference]: Without dead ends: 15754 [2020-07-19 21:30:05,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-07-19 21:30:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-07-19 21:30:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-07-19 21:30:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-07-19 21:30:05,866 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-07-19 21:30:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:05,866 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-07-19 21:30:05,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-07-19 21:30:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:30:05,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:05,886 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, 1, 1] [2020-07-19 21:30:05,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-19 21:30:05,886 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-07-19 21:30:05,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:05,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262857507] [2020-07-19 21:30:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:05,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262857507] [2020-07-19 21:30:05,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:05,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:05,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287624802] [2020-07-19 21:30:05,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:05,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:05,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:05,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:05,907 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-07-19 21:30:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:06,484 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-07-19 21:30:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:06,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-19 21:30:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:06,516 INFO L225 Difference]: With dead ends: 23820 [2020-07-19 21:30:06,516 INFO L226 Difference]: Without dead ends: 16138 [2020-07-19 21:30:06,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-07-19 21:30:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-07-19 21:30:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-07-19 21:30:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-07-19 21:30:06,836 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-07-19 21:30:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:06,836 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-07-19 21:30:06,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-07-19 21:30:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:30:06,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:06,858 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, 1, 1] [2020-07-19 21:30:06,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-19 21:30:06,859 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-07-19 21:30:06,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:06,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153839629] [2020-07-19 21:30:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:06,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153839629] [2020-07-19 21:30:06,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:06,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:06,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627128611] [2020-07-19 21:30:06,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:06,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:06,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:06,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:06,883 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-07-19 21:30:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:07,262 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-07-19 21:30:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:07,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-19 21:30:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:07,315 INFO L225 Difference]: With dead ends: 26636 [2020-07-19 21:30:07,315 INFO L226 Difference]: Without dead ends: 26634 [2020-07-19 21:30:07,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-07-19 21:30:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-07-19 21:30:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-07-19 21:30:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-07-19 21:30:07,774 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-07-19 21:30:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:07,774 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-07-19 21:30:07,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-07-19 21:30:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:30:07,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:07,816 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, 1, 1] [2020-07-19 21:30:07,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-19 21:30:07,816 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-07-19 21:30:07,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:07,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859223173] [2020-07-19 21:30:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:07,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859223173] [2020-07-19 21:30:07,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:07,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:07,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324063254] [2020-07-19 21:30:07,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:07,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:07,838 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-07-19 21:30:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:08,280 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-07-19 21:30:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:08,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-19 21:30:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:08,342 INFO L225 Difference]: With dead ends: 55308 [2020-07-19 21:30:08,342 INFO L226 Difference]: Without dead ends: 31242 [2020-07-19 21:30:08,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-07-19 21:30:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-07-19 21:30:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-07-19 21:30:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-07-19 21:30:09,169 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-07-19 21:30:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:09,170 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-07-19 21:30:09,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-07-19 21:30:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:30:09,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:09,191 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, 1, 1, 1] [2020-07-19 21:30:09,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-19 21:30:09,192 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:09,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-07-19 21:30:09,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:09,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313704735] [2020-07-19 21:30:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:09,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313704735] [2020-07-19 21:30:09,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:09,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:09,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941766596] [2020-07-19 21:30:09,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:09,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:09,213 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-07-19 21:30:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:09,559 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-07-19 21:30:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:09,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-19 21:30:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:09,622 INFO L225 Difference]: With dead ends: 46860 [2020-07-19 21:30:09,622 INFO L226 Difference]: Without dead ends: 31754 [2020-07-19 21:30:09,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-07-19 21:30:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-07-19 21:30:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-07-19 21:30:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-07-19 21:30:11,028 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-07-19 21:30:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:11,028 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-07-19 21:30:11,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-07-19 21:30:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:30:11,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:11,047 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, 1, 1, 1] [2020-07-19 21:30:11,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-19 21:30:11,047 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-07-19 21:30:11,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:11,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122196010] [2020-07-19 21:30:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:11,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122196010] [2020-07-19 21:30:11,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:11,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:11,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223652684] [2020-07-19 21:30:11,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:11,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:11,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:11,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:11,070 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-07-19 21:30:11,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:11,560 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-07-19 21:30:11,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:11,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-19 21:30:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:11,629 INFO L225 Difference]: With dead ends: 51210 [2020-07-19 21:30:11,629 INFO L226 Difference]: Without dead ends: 51208 [2020-07-19 21:30:11,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-07-19 21:30:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-07-19 21:30:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-07-19 21:30:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-07-19 21:30:12,648 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-07-19 21:30:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:12,648 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-07-19 21:30:12,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-07-19 21:30:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:30:12,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:30:12,685 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, 1, 1, 1] [2020-07-19 21:30:12,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-19 21:30:12,685 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:30:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:30:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-07-19 21:30:12,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:30:12,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603830302] [2020-07-19 21:30:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3556dbf1 [2020-07-19 21:30:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:30:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:30:12,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603830302] [2020-07-19 21:30:12,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:30:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:30:12,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185874191] [2020-07-19 21:30:12,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:30:12,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:30:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:30:12,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:12,713 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-07-19 21:30:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:30:13,404 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-07-19 21:30:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:30:13,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-19 21:30:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:30:13,406 INFO L225 Difference]: With dead ends: 109576 [2020-07-19 21:30:13,406 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:30:13,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:30:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:30:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:30:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:30:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:30:13,518 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-19 21:30:13,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:30:13,518 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:30:13,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:30:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:30:13,518 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:30:13,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-19 21:30:13,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:30:13,564 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:30:13,564 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:30:13,564 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:30:13,565 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:30:13,565 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:30:13,565 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:30:13,565 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-07-19 21:30:13,565 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-07-19 21:30:13,565 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-07-19 21:30:13,565 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-07-19 21:30:13,565 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,566 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-07-19 21:30:13,567 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,567 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,567 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-07-19 21:30:13,567 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,567 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-07-19 21:30:13,569 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,569 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,570 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-19 21:30:13,570 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-07-19 21:30:13,570 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-07-19 21:30:13,570 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-19 21:30:13,570 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,570 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,571 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,572 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,572 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-07-19 21:30:13,572 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-07-19 21:30:13,572 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,572 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-07-19 21:30:13,572 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-07-19 21:30:13,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:30:13 BoogieIcfgContainer [2020-07-19 21:30:13,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:30:13,593 INFO L168 Benchmark]: Toolchain (without parser) took 14405.05 ms. Allocated memory was 138.4 MB in the beginning and 993.5 MB in the end (delta: 855.1 MB). Free memory was 102.6 MB in the beginning and 176.1 MB in the end (delta: -73.4 MB). Peak memory consumption was 781.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:30:13,600 INFO L168 Benchmark]: CDTParser took 0.23 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. [2020-07-19 21:30:13,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.76 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 181.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:30:13,601 INFO L168 Benchmark]: Boogie Preprocessor took 41.80 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-19 21:30:13,601 INFO L168 Benchmark]: RCFGBuilder took 430.87 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 159.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:30:13,602 INFO L168 Benchmark]: TraceAbstraction took 13550.60 ms. Allocated memory was 202.9 MB in the beginning and 993.5 MB in the end (delta: 790.6 MB). Free memory was 158.8 MB in the beginning and 176.1 MB in the end (delta: -17.2 MB). Peak memory consumption was 773.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:30:13,809 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 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 374.76 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 181.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.80 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 179.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.87 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 159.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13550.60 ms. Allocated memory was 202.9 MB in the beginning and 993.5 MB in the end (delta: 790.6 MB). Free memory was 158.8 MB in the beginning and 176.1 MB in the end (delta: -17.2 MB). Peak memory consumption was 773.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.4s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.9s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 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...