/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.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_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 [2020-07-20 05:45:51,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:45:51,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:45:51,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:45:51,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:45:51,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:45:51,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:45:51,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:45:51,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:45:51,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:45:51,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:45:51,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:45:51,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:45:51,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:45:51,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:45:51,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:45:51,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:45:51,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:45:51,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:45:51,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:45:51,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:45:51,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:45:51,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:45:51,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:45:51,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:45:51,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:45:51,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:45:51,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:45:51,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 05:45:51,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:45:51,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:45:51,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:45:51,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:45:51,723 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:45:51,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:45:51,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:45:51,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:45:51,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:45:51,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:45:51,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:45:51,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:45:51,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:45:51,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:45:51,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:45:51,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:45:51,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:45:51,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:45:51,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:45:51,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:45:51,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:45:51,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:45:51,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:45:51,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:45:51,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:45:51,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:45:51,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:45:51,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:45:51,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:45:51,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:45:52,029 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:45:52,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:45:52,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:45:52,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:45:52,049 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:45:52,050 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-07-20 05:45:52,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f499acb/5ff1c1fc70c549cc97dd3e5946c0e9a9/FLAGd6895d7a9 [2020-07-20 05:45:52,621 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:45:52,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2020-07-20 05:45:52,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f499acb/5ff1c1fc70c549cc97dd3e5946c0e9a9/FLAGd6895d7a9 [2020-07-20 05:45:53,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f499acb/5ff1c1fc70c549cc97dd3e5946c0e9a9 [2020-07-20 05:45:53,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:45:53,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:45:53,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:45:53,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:45:53,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:45:53,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53, skipping insertion in model container [2020-07-20 05:45:53,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:45:53,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:45:53,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:45:53,262 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:45:53,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:45:53,303 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:45:53,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53 WrapperNode [2020-07-20 05:45:53,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:45:53,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:45:53,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:45:53,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:45:53,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... [2020-07-20 05:45:53,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:45:53,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:45:53,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:45:53,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:45:53,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:45:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:45:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:45:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:45:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:45:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:45:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:45:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:45:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:45:53,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:45:53,832 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 05:45:53,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:45:53 BoogieIcfgContainer [2020-07-20 05:45:53,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:45:53,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:45:53,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:45:53,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:45:53,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:45:53" (1/3) ... [2020-07-20 05:45:53,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d07f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:45:53, skipping insertion in model container [2020-07-20 05:45:53,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:45:53" (2/3) ... [2020-07-20 05:45:53,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d07f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:45:53, skipping insertion in model container [2020-07-20 05:45:53,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:45:53" (3/3) ... [2020-07-20 05:45:53,846 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-07-20 05:45:53,858 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:45:53,866 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:45:53,885 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:45:53,920 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:45:53,920 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:45:53,920 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:45:53,921 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:45:53,921 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:45:53,921 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:45:53,921 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:45:53,922 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:45:53,948 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-20 05:45:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 05:45:53,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:53,959 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] [2020-07-20 05:45:53,959 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:53,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-07-20 05:45:53,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:53,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904312206] [2020-07-20 05:45:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:54,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904312206] [2020-07-20 05:45:54,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:54,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:54,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424782568] [2020-07-20 05:45:54,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:54,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:54,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:54,229 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-07-20 05:45:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:54,295 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-07-20 05:45:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:54,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 05:45:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:54,312 INFO L225 Difference]: With dead ends: 93 [2020-07-20 05:45:54,312 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 05:45:54,316 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 [2020-07-20 05:45:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 05:45:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-07-20 05:45:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 05:45:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-07-20 05:45:54,373 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-07-20 05:45:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:54,374 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-07-20 05:45:54,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-07-20 05:45:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 05:45:54,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:54,376 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] [2020-07-20 05:45:54,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:45:54,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-07-20 05:45:54,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:54,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155564896] [2020-07-20 05:45:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:54,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155564896] [2020-07-20 05:45:54,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:54,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:54,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190669719] [2020-07-20 05:45:54,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:54,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:54,470 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-07-20 05:45:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:54,512 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-07-20 05:45:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:54,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 05:45:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:54,515 INFO L225 Difference]: With dead ends: 127 [2020-07-20 05:45:54,516 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 05:45:54,517 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 [2020-07-20 05:45:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 05:45:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-20 05:45:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 05:45:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-07-20 05:45:54,530 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-07-20 05:45:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:54,531 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-07-20 05:45:54,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-07-20 05:45:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:45:54,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:54,533 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] [2020-07-20 05:45:54,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:45:54,533 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-07-20 05:45:54,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:54,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093280436] [2020-07-20 05:45:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:54,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093280436] [2020-07-20 05:45:54,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:54,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:54,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845035624] [2020-07-20 05:45:54,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:54,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:54,601 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-07-20 05:45:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:54,637 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-07-20 05:45:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:54,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 05:45:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:54,640 INFO L225 Difference]: With dead ends: 117 [2020-07-20 05:45:54,642 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 05:45:54,643 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 [2020-07-20 05:45:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 05:45:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-07-20 05:45:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 05:45:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-07-20 05:45:54,665 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-07-20 05:45:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:54,665 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-07-20 05:45:54,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-07-20 05:45:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:45:54,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:54,667 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] [2020-07-20 05:45:54,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 05:45:54,667 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-07-20 05:45:54,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:54,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185064643] [2020-07-20 05:45:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:54,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185064643] [2020-07-20 05:45:54,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:54,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:54,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291386876] [2020-07-20 05:45:54,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:54,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:54,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:54,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:54,713 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-07-20 05:45:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:54,736 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-07-20 05:45:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:54,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 05:45:54,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:54,739 INFO L225 Difference]: With dead ends: 148 [2020-07-20 05:45:54,739 INFO L226 Difference]: Without dead ends: 146 [2020-07-20 05:45:54,740 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 [2020-07-20 05:45:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-20 05:45:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-07-20 05:45:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-20 05:45:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-07-20 05:45:54,752 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-07-20 05:45:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:54,753 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-07-20 05:45:54,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-07-20 05:45:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:45:54,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:54,754 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] [2020-07-20 05:45:54,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 05:45:54,755 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-07-20 05:45:54,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:54,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930794302] [2020-07-20 05:45:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:54,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930794302] [2020-07-20 05:45:54,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:54,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:54,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730419173] [2020-07-20 05:45:54,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:54,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:54,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:54,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:54,801 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-07-20 05:45:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:54,824 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-07-20 05:45:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:54,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 05:45:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:54,826 INFO L225 Difference]: With dead ends: 244 [2020-07-20 05:45:54,826 INFO L226 Difference]: Without dead ends: 148 [2020-07-20 05:45:54,828 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 [2020-07-20 05:45:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-07-20 05:45:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-07-20 05:45:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 05:45:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-07-20 05:45:54,840 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-07-20 05:45:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:54,840 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-07-20 05:45:54,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-07-20 05:45:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:45:54,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:54,842 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] [2020-07-20 05:45:54,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 05:45:54,843 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-07-20 05:45:54,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:54,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509670012] [2020-07-20 05:45:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:54,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509670012] [2020-07-20 05:45:54,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:54,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:54,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950950598] [2020-07-20 05:45:54,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:54,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:54,915 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-07-20 05:45:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:54,938 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-07-20 05:45:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:54,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 05:45:54,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:54,941 INFO L225 Difference]: With dead ends: 219 [2020-07-20 05:45:54,941 INFO L226 Difference]: Without dead ends: 150 [2020-07-20 05:45:54,942 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 [2020-07-20 05:45:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-20 05:45:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-07-20 05:45:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 05:45:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-07-20 05:45:54,972 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-07-20 05:45:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:54,972 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-07-20 05:45:54,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-07-20 05:45:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:45:54,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:54,974 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] [2020-07-20 05:45:54,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 05:45:54,975 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-07-20 05:45:54,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:54,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105567996] [2020-07-20 05:45:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105567996] [2020-07-20 05:45:55,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753092327] [2020-07-20 05:45:55,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,012 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-07-20 05:45:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,038 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-07-20 05:45:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 05:45:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,043 INFO L225 Difference]: With dead ends: 276 [2020-07-20 05:45:55,043 INFO L226 Difference]: Without dead ends: 274 [2020-07-20 05:45:55,044 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 [2020-07-20 05:45:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-20 05:45:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-07-20 05:45:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-20 05:45:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-07-20 05:45:55,055 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-07-20 05:45:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,056 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-07-20 05:45:55,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-07-20 05:45:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:45:55,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,058 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] [2020-07-20 05:45:55,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 05:45:55,058 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-07-20 05:45:55,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909740243] [2020-07-20 05:45:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909740243] [2020-07-20 05:45:55,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612186415] [2020-07-20 05:45:55,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,090 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-07-20 05:45:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,112 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-07-20 05:45:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 05:45:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,115 INFO L225 Difference]: With dead ends: 472 [2020-07-20 05:45:55,115 INFO L226 Difference]: Without dead ends: 282 [2020-07-20 05:45:55,116 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 [2020-07-20 05:45:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-07-20 05:45:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-07-20 05:45:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-20 05:45:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-07-20 05:45:55,129 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-07-20 05:45:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,129 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-07-20 05:45:55,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-07-20 05:45:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:45:55,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,131 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] [2020-07-20 05:45:55,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 05:45:55,131 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-07-20 05:45:55,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501472407] [2020-07-20 05:45:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501472407] [2020-07-20 05:45:55,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681730082] [2020-07-20 05:45:55,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,183 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-07-20 05:45:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,202 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-07-20 05:45:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 05:45:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,205 INFO L225 Difference]: With dead ends: 420 [2020-07-20 05:45:55,205 INFO L226 Difference]: Without dead ends: 286 [2020-07-20 05:45:55,206 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 [2020-07-20 05:45:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-20 05:45:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-07-20 05:45:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-20 05:45:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-07-20 05:45:55,217 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-07-20 05:45:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,217 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-07-20 05:45:55,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-07-20 05:45:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:45:55,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,219 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] [2020-07-20 05:45:55,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 05:45:55,219 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-07-20 05:45:55,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406478448] [2020-07-20 05:45:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406478448] [2020-07-20 05:45:55,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384639204] [2020-07-20 05:45:55,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,247 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-07-20 05:45:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,268 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-07-20 05:45:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 05:45:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,272 INFO L225 Difference]: With dead ends: 524 [2020-07-20 05:45:55,272 INFO L226 Difference]: Without dead ends: 522 [2020-07-20 05:45:55,273 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 [2020-07-20 05:45:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-07-20 05:45:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-07-20 05:45:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-07-20 05:45:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-07-20 05:45:55,287 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-07-20 05:45:55,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,288 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-07-20 05:45:55,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-07-20 05:45:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:45:55,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,289 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] [2020-07-20 05:45:55,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 05:45:55,290 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,290 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-07-20 05:45:55,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128327941] [2020-07-20 05:45:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128327941] [2020-07-20 05:45:55,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962474858] [2020-07-20 05:45:55,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,320 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-07-20 05:45:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,344 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-07-20 05:45:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 05:45:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,348 INFO L225 Difference]: With dead ends: 924 [2020-07-20 05:45:55,348 INFO L226 Difference]: Without dead ends: 546 [2020-07-20 05:45:55,349 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 [2020-07-20 05:45:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-07-20 05:45:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-07-20 05:45:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-07-20 05:45:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-07-20 05:45:55,366 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-07-20 05:45:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,367 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-07-20 05:45:55,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-07-20 05:45:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:45:55,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,368 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] [2020-07-20 05:45:55,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 05:45:55,369 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-07-20 05:45:55,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150157888] [2020-07-20 05:45:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150157888] [2020-07-20 05:45:55,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993805984] [2020-07-20 05:45:55,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,397 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-07-20 05:45:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,418 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-07-20 05:45:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 05:45:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,422 INFO L225 Difference]: With dead ends: 816 [2020-07-20 05:45:55,422 INFO L226 Difference]: Without dead ends: 554 [2020-07-20 05:45:55,423 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 [2020-07-20 05:45:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-07-20 05:45:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-07-20 05:45:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-07-20 05:45:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-07-20 05:45:55,440 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-07-20 05:45:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,441 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-07-20 05:45:55,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-07-20 05:45:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:45:55,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,442 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] [2020-07-20 05:45:55,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 05:45:55,443 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-07-20 05:45:55,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609639344] [2020-07-20 05:45:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609639344] [2020-07-20 05:45:55,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134011187] [2020-07-20 05:45:55,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,485 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-07-20 05:45:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,521 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-07-20 05:45:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 05:45:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,527 INFO L225 Difference]: With dead ends: 1004 [2020-07-20 05:45:55,527 INFO L226 Difference]: Without dead ends: 1002 [2020-07-20 05:45:55,528 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 [2020-07-20 05:45:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-07-20 05:45:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-07-20 05:45:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-20 05:45:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-07-20 05:45:55,552 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-07-20 05:45:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,553 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-07-20 05:45:55,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-07-20 05:45:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:45:55,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,555 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] [2020-07-20 05:45:55,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 05:45:55,555 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-07-20 05:45:55,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356326932] [2020-07-20 05:45:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356326932] [2020-07-20 05:45:55,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249990515] [2020-07-20 05:45:55,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,584 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-07-20 05:45:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,615 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-07-20 05:45:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 05:45:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,622 INFO L225 Difference]: With dead ends: 1820 [2020-07-20 05:45:55,622 INFO L226 Difference]: Without dead ends: 1066 [2020-07-20 05:45:55,624 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 [2020-07-20 05:45:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-07-20 05:45:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-07-20 05:45:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-07-20 05:45:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-07-20 05:45:55,657 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-07-20 05:45:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,657 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-07-20 05:45:55,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-07-20 05:45:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:45:55,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,660 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] [2020-07-20 05:45:55,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 05:45:55,660 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-07-20 05:45:55,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878886823] [2020-07-20 05:45:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878886823] [2020-07-20 05:45:55,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880022171] [2020-07-20 05:45:55,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,702 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-07-20 05:45:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,729 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-07-20 05:45:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 05:45:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,736 INFO L225 Difference]: With dead ends: 1596 [2020-07-20 05:45:55,737 INFO L226 Difference]: Without dead ends: 1082 [2020-07-20 05:45:55,738 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 [2020-07-20 05:45:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-07-20 05:45:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-07-20 05:45:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-07-20 05:45:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-07-20 05:45:55,770 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-07-20 05:45:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,770 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-07-20 05:45:55,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-07-20 05:45:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:45:55,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,773 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] [2020-07-20 05:45:55,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 05:45:55,773 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,774 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-07-20 05:45:55,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982669762] [2020-07-20 05:45:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982669762] [2020-07-20 05:45:55,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129311861] [2020-07-20 05:45:55,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,799 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-07-20 05:45:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,831 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-07-20 05:45:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 05:45:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,841 INFO L225 Difference]: With dead ends: 1932 [2020-07-20 05:45:55,841 INFO L226 Difference]: Without dead ends: 1930 [2020-07-20 05:45:55,842 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 [2020-07-20 05:45:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-20 05:45:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-07-20 05:45:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-20 05:45:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-07-20 05:45:55,885 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-07-20 05:45:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:55,886 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-07-20 05:45:55,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-07-20 05:45:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:45:55,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:55,889 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] [2020-07-20 05:45:55,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 05:45:55,889 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:55,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-07-20 05:45:55,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:55,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920700884] [2020-07-20 05:45:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:55,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920700884] [2020-07-20 05:45:55,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:55,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:55,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234917535] [2020-07-20 05:45:55,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:55,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:55,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:55,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:55,913 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-07-20 05:45:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:55,956 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-07-20 05:45:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:55,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 05:45:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:55,966 INFO L225 Difference]: With dead ends: 3596 [2020-07-20 05:45:55,966 INFO L226 Difference]: Without dead ends: 2090 [2020-07-20 05:45:55,970 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 [2020-07-20 05:45:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-07-20 05:45:56,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-07-20 05:45:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-07-20 05:45:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-07-20 05:45:56,027 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-07-20 05:45:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:56,028 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-07-20 05:45:56,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-07-20 05:45:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:45:56,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:56,031 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] [2020-07-20 05:45:56,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 05:45:56,031 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-07-20 05:45:56,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:56,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656538308] [2020-07-20 05:45:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:56,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656538308] [2020-07-20 05:45:56,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:56,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:56,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212598997] [2020-07-20 05:45:56,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:56,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:56,053 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-07-20 05:45:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:56,095 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-07-20 05:45:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:56,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 05:45:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:56,105 INFO L225 Difference]: With dead ends: 3132 [2020-07-20 05:45:56,105 INFO L226 Difference]: Without dead ends: 2122 [2020-07-20 05:45:56,108 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 [2020-07-20 05:45:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-07-20 05:45:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-07-20 05:45:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-07-20 05:45:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-07-20 05:45:56,163 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-07-20 05:45:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:56,164 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-07-20 05:45:56,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-07-20 05:45:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:45:56,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:56,166 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] [2020-07-20 05:45:56,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 05:45:56,167 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:56,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-07-20 05:45:56,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:56,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378263613] [2020-07-20 05:45:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:56,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378263613] [2020-07-20 05:45:56,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:56,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:56,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170281213] [2020-07-20 05:45:56,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:56,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:56,208 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-07-20 05:45:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:56,288 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-07-20 05:45:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:56,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 05:45:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:56,305 INFO L225 Difference]: With dead ends: 3724 [2020-07-20 05:45:56,305 INFO L226 Difference]: Without dead ends: 3722 [2020-07-20 05:45:56,307 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 [2020-07-20 05:45:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-20 05:45:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-07-20 05:45:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-07-20 05:45:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-07-20 05:45:56,388 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-07-20 05:45:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:56,388 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-07-20 05:45:56,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-07-20 05:45:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 05:45:56,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:56,396 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] [2020-07-20 05:45:56,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 05:45:56,396 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:56,397 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-07-20 05:45:56,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:56,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022532922] [2020-07-20 05:45:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:56,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022532922] [2020-07-20 05:45:56,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:56,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:56,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054023626] [2020-07-20 05:45:56,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:56,428 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-07-20 05:45:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:56,499 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-07-20 05:45:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:56,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 05:45:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:56,519 INFO L225 Difference]: With dead ends: 7116 [2020-07-20 05:45:56,519 INFO L226 Difference]: Without dead ends: 4106 [2020-07-20 05:45:56,525 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 [2020-07-20 05:45:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-07-20 05:45:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-07-20 05:45:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-07-20 05:45:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-07-20 05:45:56,652 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-07-20 05:45:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:56,652 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-07-20 05:45:56,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-07-20 05:45:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:45:56,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:56,661 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] [2020-07-20 05:45:56,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 05:45:56,665 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-07-20 05:45:56,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:56,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496402248] [2020-07-20 05:45:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:56,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496402248] [2020-07-20 05:45:56,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:56,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:56,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924179687] [2020-07-20 05:45:56,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:56,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:56,691 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-07-20 05:45:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:56,805 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-07-20 05:45:56,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:56,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 05:45:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:56,842 INFO L225 Difference]: With dead ends: 6156 [2020-07-20 05:45:56,842 INFO L226 Difference]: Without dead ends: 4170 [2020-07-20 05:45:56,854 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 [2020-07-20 05:45:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-07-20 05:45:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-07-20 05:45:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-07-20 05:45:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-07-20 05:45:56,965 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-07-20 05:45:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:56,966 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-07-20 05:45:56,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-07-20 05:45:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:45:56,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:56,971 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] [2020-07-20 05:45:56,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 05:45:56,972 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:56,972 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-07-20 05:45:56,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:56,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11465281] [2020-07-20 05:45:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:56,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11465281] [2020-07-20 05:45:56,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:57,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:57,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051510890] [2020-07-20 05:45:57,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:57,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:57,002 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-07-20 05:45:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:57,101 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-07-20 05:45:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:57,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 05:45:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:57,120 INFO L225 Difference]: With dead ends: 12108 [2020-07-20 05:45:57,120 INFO L226 Difference]: Without dead ends: 8074 [2020-07-20 05:45:57,131 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 [2020-07-20 05:45:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-20 05:45:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-07-20 05:45:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-20 05:45:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-07-20 05:45:57,397 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-07-20 05:45:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:57,397 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-07-20 05:45:57,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-07-20 05:45:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:45:57,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:57,407 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] [2020-07-20 05:45:57,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 05:45:57,407 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-07-20 05:45:57,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:57,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662982917] [2020-07-20 05:45:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:57,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662982917] [2020-07-20 05:45:57,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:57,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:57,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184072817] [2020-07-20 05:45:57,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:57,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:57,464 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-07-20 05:45:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:57,569 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-07-20 05:45:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:57,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-20 05:45:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:57,588 INFO L225 Difference]: With dead ends: 9100 [2020-07-20 05:45:57,589 INFO L226 Difference]: Without dead ends: 9098 [2020-07-20 05:45:57,593 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 [2020-07-20 05:45:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-07-20 05:45:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-07-20 05:45:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-07-20 05:45:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-07-20 05:45:57,762 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-07-20 05:45:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:57,762 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-07-20 05:45:57,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-07-20 05:45:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 05:45:57,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:57,777 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] [2020-07-20 05:45:57,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-20 05:45:57,777 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:57,778 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-07-20 05:45:57,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:57,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327391024] [2020-07-20 05:45:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:57,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327391024] [2020-07-20 05:45:57,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:57,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:57,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186626116] [2020-07-20 05:45:57,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:57,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:57,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:57,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:57,798 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-07-20 05:45:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:58,018 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-07-20 05:45:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:58,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 05:45:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:58,048 INFO L225 Difference]: With dead ends: 13708 [2020-07-20 05:45:58,048 INFO L226 Difference]: Without dead ends: 13706 [2020-07-20 05:45:58,053 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 [2020-07-20 05:45:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-07-20 05:45:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-07-20 05:45:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-07-20 05:45:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-07-20 05:45:58,284 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-07-20 05:45:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:58,284 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-07-20 05:45:58,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-07-20 05:45:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 05:45:58,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:58,303 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] [2020-07-20 05:45:58,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-20 05:45:58,303 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-07-20 05:45:58,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:58,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731843079] [2020-07-20 05:45:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:58,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731843079] [2020-07-20 05:45:58,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:58,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:58,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741036956] [2020-07-20 05:45:58,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:58,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:58,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:58,322 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-07-20 05:45:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:58,662 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-07-20 05:45:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:58,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-20 05:45:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:58,694 INFO L225 Difference]: With dead ends: 27788 [2020-07-20 05:45:58,694 INFO L226 Difference]: Without dead ends: 15754 [2020-07-20 05:45:58,715 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 [2020-07-20 05:45:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-07-20 05:45:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-07-20 05:45:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-07-20 05:45:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-07-20 05:45:59,011 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-07-20 05:45:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:45:59,012 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-07-20 05:45:59,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:45:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-07-20 05:45:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:45:59,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:45:59,031 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] [2020-07-20 05:45:59,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-20 05:45:59,032 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:45:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:45:59,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-07-20 05:45:59,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:45:59,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899194879] [2020-07-20 05:45:59,033 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:45:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:45:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:45:59,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899194879] [2020-07-20 05:45:59,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:45:59,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:45:59,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627436163] [2020-07-20 05:45:59,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:45:59,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:45:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:45:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:45:59,061 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-07-20 05:45:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:45:59,679 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-07-20 05:45:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:45:59,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 05:45:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:45:59,714 INFO L225 Difference]: With dead ends: 23820 [2020-07-20 05:45:59,714 INFO L226 Difference]: Without dead ends: 16138 [2020-07-20 05:45:59,731 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 [2020-07-20 05:45:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-07-20 05:45:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-07-20 05:45:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-07-20 05:46:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-07-20 05:46:00,019 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-07-20 05:46:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:00,019 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-07-20 05:46:00,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-07-20 05:46:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:46:00,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:00,035 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] [2020-07-20 05:46:00,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-20 05:46:00,035 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-07-20 05:46:00,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:00,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042853981] [2020-07-20 05:46:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:46:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:00,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042853981] [2020-07-20 05:46:00,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:00,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:00,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646236359] [2020-07-20 05:46:00,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:00,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:00,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:00,059 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-07-20 05:46:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:00,549 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-07-20 05:46:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:00,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 05:46:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:00,611 INFO L225 Difference]: With dead ends: 26636 [2020-07-20 05:46:00,611 INFO L226 Difference]: Without dead ends: 26634 [2020-07-20 05:46:00,617 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 [2020-07-20 05:46:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-07-20 05:46:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-07-20 05:46:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-07-20 05:46:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-07-20 05:46:01,045 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-07-20 05:46:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,045 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-07-20 05:46:01,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-07-20 05:46:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:46:01,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,074 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] [2020-07-20 05:46:01,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-20 05:46:01,074 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,075 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-07-20 05:46:01,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111071843] [2020-07-20 05:46:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:46:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:01,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111071843] [2020-07-20 05:46:01,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729098696] [2020-07-20 05:46:01,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,096 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-07-20 05:46:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,551 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-07-20 05:46:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-20 05:46:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,591 INFO L225 Difference]: With dead ends: 55308 [2020-07-20 05:46:01,592 INFO L226 Difference]: Without dead ends: 31242 [2020-07-20 05:46:01,632 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 [2020-07-20 05:46:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-07-20 05:46:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-07-20 05:46:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-07-20 05:46:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-07-20 05:46:02,230 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-07-20 05:46:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,230 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-07-20 05:46:02,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-07-20 05:46:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 05:46:02,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,257 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] [2020-07-20 05:46:02,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-20 05:46:02,258 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-07-20 05:46:02,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640375068] [2020-07-20 05:46:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:46:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:02,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640375068] [2020-07-20 05:46:02,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620859397] [2020-07-20 05:46:02,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,281 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-07-20 05:46:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,667 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-07-20 05:46:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 05:46:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,708 INFO L225 Difference]: With dead ends: 46860 [2020-07-20 05:46:02,708 INFO L226 Difference]: Without dead ends: 31754 [2020-07-20 05:46:02,734 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 [2020-07-20 05:46:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-07-20 05:46:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-07-20 05:46:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-07-20 05:46:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-07-20 05:46:03,474 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-07-20 05:46:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:03,475 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-07-20 05:46:03,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-07-20 05:46:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 05:46:03,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:03,496 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] [2020-07-20 05:46:03,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-20 05:46:03,496 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:03,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:03,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-07-20 05:46:03,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:03,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902959176] [2020-07-20 05:46:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:46:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:03,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902959176] [2020-07-20 05:46:03,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:03,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:03,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097282686] [2020-07-20 05:46:03,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:03,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:03,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:03,521 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-07-20 05:46:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:03,860 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-07-20 05:46:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:03,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 05:46:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:03,907 INFO L225 Difference]: With dead ends: 51210 [2020-07-20 05:46:03,907 INFO L226 Difference]: Without dead ends: 51208 [2020-07-20 05:46:03,920 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 [2020-07-20 05:46:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-07-20 05:46:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-07-20 05:46:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-07-20 05:46:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-07-20 05:46:05,467 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-07-20 05:46:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:05,467 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-07-20 05:46:05,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-07-20 05:46:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 05:46:05,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:05,507 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] [2020-07-20 05:46:05,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-20 05:46:05,508 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:05,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-07-20 05:46:05,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:05,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102880771] [2020-07-20 05:46:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71f42c8b [2020-07-20 05:46:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:05,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102880771] [2020-07-20 05:46:05,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:05,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:05,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929062979] [2020-07-20 05:46:05,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:05,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:05,531 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-07-20 05:46:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:06,050 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-07-20 05:46:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:06,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-20 05:46:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:06,051 INFO L225 Difference]: With dead ends: 109576 [2020-07-20 05:46:06,051 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:46:06,158 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 [2020-07-20 05:46:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:46:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:46:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:46:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:46:06,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-20 05:46:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:06,159 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:46:06,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:46:06,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:46:06,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-20 05:46:06,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:46:06,191 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:46:06,191 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:46:06,191 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:46:06,191 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:46:06,192 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-07-20 05:46:06,192 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-07-20 05:46:06,192 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-07-20 05:46:06,193 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,194 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,194 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-07-20 05:46:06,194 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,194 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-07-20 05:46:06,194 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,194 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-07-20 05:46:06,195 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,196 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-07-20 05:46:06,197 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-07-20 05:46:06,197 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,197 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-07-20 05:46:06,197 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-07-20 05:46:06,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:46:06 BoogieIcfgContainer [2020-07-20 05:46:06,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:46:06,212 INFO L168 Benchmark]: Toolchain (without parser) took 13192.29 ms. Allocated memory was 137.9 MB in the beginning and 1.0 GB in the end (delta: 880.3 MB). Free memory was 102.2 MB in the beginning and 340.9 MB in the end (delta: -238.8 MB). Peak memory consumption was 641.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:06,213 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 05:46:06,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.91 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 90.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:06,214 INFO L168 Benchmark]: Boogie Preprocessor took 130.89 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.9 MB in the beginning and 179.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:06,214 INFO L168 Benchmark]: RCFGBuilder took 401.16 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 159.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:06,215 INFO L168 Benchmark]: TraceAbstraction took 12371.90 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 815.8 MB). Free memory was 159.0 MB in the beginning and 340.9 MB in the end (delta: -182.0 MB). Peak memory consumption was 633.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:06,217 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 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.91 ms. Allocated memory is still 137.9 MB. Free memory was 101.8 MB in the beginning and 90.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.89 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.9 MB in the beginning and 179.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.16 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 159.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12371.90 ms. Allocated memory was 202.4 MB in the beginning and 1.0 GB in the end (delta: 815.8 MB). Free memory was 159.0 MB in the beginning and 340.9 MB in the end (delta: -182.0 MB). Peak memory consumption was 633.8 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: 12.2s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.2s, 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, 0.1s 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: 5.3s 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, 0.2s SatisfiabilityAnalysisTime, 0.6s 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...