/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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:45:58,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:45:58,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:45:58,567 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:45:58,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:45:58,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:45:58,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:45:58,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:45:58,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:45:58,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:45:58,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:45:58,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:45:58,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:45:58,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:45:58,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:45:58,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:45:58,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:45:58,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:45:58,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:45:58,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:45:58,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:45:58,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:45:58,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:45:58,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:45:58,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:45:58,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:45:58,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:45:58,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:45:58,612 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 05:45:58,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:45:58,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:45:58,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:45:58,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:45:58,630 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:45:58,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:45:58,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:45:58,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:45:58,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:45:58,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:45:58,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:45:58,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:45:58,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:45:58,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:45:58,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:45:58,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:45:58,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:45:58,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:45:58,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:45:58,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:45:58,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:45:58,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:45:58,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:45:58,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:45:58,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:45:58,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:45:58,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:45:58,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:45:58,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:45:58,635 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 05:45:58,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:45:58,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:45:58,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:45:58,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:45:58,973 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:45:58,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-07-20 05:45:59,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641947852/959f8d993283433b9cabdac7b38c3efd/FLAG25332e0fb [2020-07-20 05:45:59,598 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:45:59,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-07-20 05:45:59,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641947852/959f8d993283433b9cabdac7b38c3efd/FLAG25332e0fb [2020-07-20 05:45:59,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/641947852/959f8d993283433b9cabdac7b38c3efd [2020-07-20 05:46:00,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:46:00,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:46:00,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:00,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:46:00,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:46:00,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:45:59" (1/1) ... [2020-07-20 05:46:00,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137c89f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00, skipping insertion in model container [2020-07-20 05:46:00,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:45:59" (1/1) ... [2020-07-20 05:46:00,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:46:00,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:46:00,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:00,230 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:46:00,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:00,348 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:46:00,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00 WrapperNode [2020-07-20 05:46:00,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:00,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:46:00,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:46:00,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:46:00,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (1/1) ... [2020-07-20 05:46:00,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:46:00,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:46:00,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:46:00,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:46:00,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (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 05:46:00,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:46:00,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:46:00,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:46:00,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:46:00,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:46:00,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:46:00,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:46:00,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:46:00,766 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:46:00,767 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 05:46:00,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:00 BoogieIcfgContainer [2020-07-20 05:46:00,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:46:00,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:46:00,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:46:00,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:46:00,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:45:59" (1/3) ... [2020-07-20 05:46:00,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acc1dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:00, skipping insertion in model container [2020-07-20 05:46:00,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:00" (2/3) ... [2020-07-20 05:46:00,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acc1dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:00, skipping insertion in model container [2020-07-20 05:46:00,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:00" (3/3) ... [2020-07-20 05:46:00,783 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-07-20 05:46:00,798 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:46:00,806 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:46:00,823 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:46:00,850 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:46:00,851 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:46:00,851 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:46:00,851 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:46:00,851 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:46:00,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:46:00,852 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:46:00,852 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:46:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-20 05:46:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 05:46:00,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:00,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:00,909 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-07-20 05:46:00,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:00,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349598533] [2020-07-20 05:46:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:46:01,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349598533] [2020-07-20 05:46:01,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159421444] [2020-07-20 05:46:01,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,155 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-07-20 05:46:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,235 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-07-20 05:46:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 05:46:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,259 INFO L225 Difference]: With dead ends: 75 [2020-07-20 05:46:01,259 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:46:01,266 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 05:46:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:46:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-20 05:46:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:46:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-07-20 05:46:01,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-07-20 05:46:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,312 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-07-20 05:46:01,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-07-20 05:46:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 05:46:01,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:01,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:46:01,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-07-20 05:46:01,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84767359] [2020-07-20 05:46:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,378 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 05:46:01,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84767359] [2020-07-20 05:46:01,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104673282] [2020-07-20 05:46:01,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,382 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-07-20 05:46:01,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,411 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-07-20 05:46:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 05:46:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,414 INFO L225 Difference]: With dead ends: 97 [2020-07-20 05:46:01,414 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 05:46:01,415 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 05:46:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 05:46:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-07-20 05:46:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 05:46:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-07-20 05:46:01,428 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-07-20 05:46:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,429 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-07-20 05:46:01,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-07-20 05:46:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:46:01,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:01,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:46:01,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-07-20 05:46:01,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526684498] [2020-07-20 05:46:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,537 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 05:46:01,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526684498] [2020-07-20 05:46:01,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995431568] [2020-07-20 05:46:01,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,545 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-07-20 05:46:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,577 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-07-20 05:46:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 05:46:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,580 INFO L225 Difference]: With dead ends: 90 [2020-07-20 05:46:01,580 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 05:46:01,581 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 05:46:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 05:46:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-20 05:46:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 05:46:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-07-20 05:46:01,592 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-07-20 05:46:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,592 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-07-20 05:46:01,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-07-20 05:46:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:46:01,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:01,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 05:46:01,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,595 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-07-20 05:46:01,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146667201] [2020-07-20 05:46:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,651 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 05:46:01,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146667201] [2020-07-20 05:46:01,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745726370] [2020-07-20 05:46:01,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,654 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-07-20 05:46:01,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,678 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-07-20 05:46:01,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 05:46:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,680 INFO L225 Difference]: With dead ends: 112 [2020-07-20 05:46:01,681 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 05:46:01,681 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 05:46:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 05:46:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-20 05:46:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 05:46:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-07-20 05:46:01,697 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-07-20 05:46:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,697 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-07-20 05:46:01,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-07-20 05:46:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 05:46:01,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:01,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 05:46:01,700 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-07-20 05:46:01,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113530105] [2020-07-20 05:46:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,735 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 05:46:01,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113530105] [2020-07-20 05:46:01,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614690862] [2020-07-20 05:46:01,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,738 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-07-20 05:46:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,760 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-07-20 05:46:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 05:46:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,763 INFO L225 Difference]: With dead ends: 184 [2020-07-20 05:46:01,763 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 05:46:01,765 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 05:46:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 05:46:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-07-20 05:46:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-20 05:46:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-07-20 05:46:01,777 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-07-20 05:46:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,777 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-07-20 05:46:01,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-07-20 05:46:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:46:01,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,779 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] [2020-07-20 05:46:01,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 05:46:01,780 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,780 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-07-20 05:46:01,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060025321] [2020-07-20 05:46:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,832 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 05:46:01,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060025321] [2020-07-20 05:46:01,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474986050] [2020-07-20 05:46:01,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,835 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-07-20 05:46:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,859 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-07-20 05:46:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 05:46:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,861 INFO L225 Difference]: With dead ends: 165 [2020-07-20 05:46:01,862 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 05:46:01,863 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 05:46:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 05:46:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-07-20 05:46:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 05:46:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-07-20 05:46:01,881 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-07-20 05:46:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,882 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-07-20 05:46:01,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-07-20 05:46:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:46:01,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,883 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] [2020-07-20 05:46:01,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 05:46:01,884 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-07-20 05:46:01,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842616293] [2020-07-20 05:46:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:01,918 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 05:46:01,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842616293] [2020-07-20 05:46:01,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:01,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:01,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072164866] [2020-07-20 05:46:01,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:01,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:01,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:01,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:01,921 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-07-20 05:46:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:01,947 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-07-20 05:46:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:01,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 05:46:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:01,950 INFO L225 Difference]: With dead ends: 204 [2020-07-20 05:46:01,950 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 05:46:01,951 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 05:46:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 05:46:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-07-20 05:46:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 05:46:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-07-20 05:46:01,983 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-07-20 05:46:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:01,984 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-07-20 05:46:01,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-07-20 05:46:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:46:01,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:01,985 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] [2020-07-20 05:46:01,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 05:46:01,986 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-07-20 05:46:01,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:01,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633888309] [2020-07-20 05:46:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,051 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 05:46:02,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633888309] [2020-07-20 05:46:02,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897030921] [2020-07-20 05:46:02,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,054 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-07-20 05:46:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,075 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-07-20 05:46:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 05:46:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,078 INFO L225 Difference]: With dead ends: 352 [2020-07-20 05:46:02,078 INFO L226 Difference]: Without dead ends: 210 [2020-07-20 05:46:02,079 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 05:46:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-20 05:46:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-07-20 05:46:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-20 05:46:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-20 05:46:02,094 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-07-20 05:46:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,094 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-20 05:46:02,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-20 05:46:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 05:46:02,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,096 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 05:46:02,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 05:46:02,097 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-07-20 05:46:02,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789683139] [2020-07-20 05:46:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,128 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 05:46:02,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789683139] [2020-07-20 05:46:02,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142741190] [2020-07-20 05:46:02,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,131 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-07-20 05:46:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,154 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-20 05:46:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 05:46:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,157 INFO L225 Difference]: With dead ends: 312 [2020-07-20 05:46:02,157 INFO L226 Difference]: Without dead ends: 214 [2020-07-20 05:46:02,159 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 05:46:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-20 05:46:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-07-20 05:46:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-20 05:46:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-07-20 05:46:02,171 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-07-20 05:46:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,172 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-07-20 05:46:02,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-07-20 05:46:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 05:46:02,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,173 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 05:46:02,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 05:46:02,174 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-07-20 05:46:02,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660684393] [2020-07-20 05:46:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,199 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 05:46:02,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660684393] [2020-07-20 05:46:02,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732778354] [2020-07-20 05:46:02,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,202 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-07-20 05:46:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,224 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-07-20 05:46:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 05:46:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,227 INFO L225 Difference]: With dead ends: 380 [2020-07-20 05:46:02,227 INFO L226 Difference]: Without dead ends: 378 [2020-07-20 05:46:02,228 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 05:46:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-07-20 05:46:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-07-20 05:46:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-07-20 05:46:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-07-20 05:46:02,242 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-07-20 05:46:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,242 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-07-20 05:46:02,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-07-20 05:46:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 05:46:02,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,244 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 05:46:02,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 05:46:02,245 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-07-20 05:46:02,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107988013] [2020-07-20 05:46:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,272 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 05:46:02,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107988013] [2020-07-20 05:46:02,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878085006] [2020-07-20 05:46:02,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,274 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-07-20 05:46:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,298 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-07-20 05:46:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 05:46:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,301 INFO L225 Difference]: With dead ends: 684 [2020-07-20 05:46:02,301 INFO L226 Difference]: Without dead ends: 402 [2020-07-20 05:46:02,302 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 05:46:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-20 05:46:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-07-20 05:46:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-07-20 05:46:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-07-20 05:46:02,329 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-07-20 05:46:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,329 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-07-20 05:46:02,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-07-20 05:46:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:46:02,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,334 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 05:46:02,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 05:46:02,334 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-07-20 05:46:02,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631362061] [2020-07-20 05:46:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,385 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 05:46:02,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631362061] [2020-07-20 05:46:02,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279429258] [2020-07-20 05:46:02,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,387 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-07-20 05:46:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,407 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-07-20 05:46:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 05:46:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,411 INFO L225 Difference]: With dead ends: 600 [2020-07-20 05:46:02,411 INFO L226 Difference]: Without dead ends: 410 [2020-07-20 05:46:02,412 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 05:46:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-20 05:46:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-07-20 05:46:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-20 05:46:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-07-20 05:46:02,427 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-07-20 05:46:02,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,427 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-07-20 05:46:02,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,427 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-07-20 05:46:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:46:02,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,429 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 05:46:02,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 05:46:02,429 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-07-20 05:46:02,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102557163] [2020-07-20 05:46:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,452 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 05:46:02,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102557163] [2020-07-20 05:46:02,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089728326] [2020-07-20 05:46:02,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,454 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-07-20 05:46:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,477 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-07-20 05:46:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 05:46:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,482 INFO L225 Difference]: With dead ends: 716 [2020-07-20 05:46:02,482 INFO L226 Difference]: Without dead ends: 714 [2020-07-20 05:46:02,483 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 05:46:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-07-20 05:46:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-07-20 05:46:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-20 05:46:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-07-20 05:46:02,502 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-07-20 05:46:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,503 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-07-20 05:46:02,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-07-20 05:46:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:46:02,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,505 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 05:46:02,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 05:46:02,505 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-07-20 05:46:02,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612802111] [2020-07-20 05:46:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,528 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 05:46:02,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612802111] [2020-07-20 05:46:02,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912575478] [2020-07-20 05:46:02,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,532 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-07-20 05:46:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,565 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-07-20 05:46:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 05:46:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,571 INFO L225 Difference]: With dead ends: 1340 [2020-07-20 05:46:02,571 INFO L226 Difference]: Without dead ends: 778 [2020-07-20 05:46:02,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-07-20 05:46:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-07-20 05:46:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-20 05:46:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-07-20 05:46:02,599 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-07-20 05:46:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,600 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-07-20 05:46:02,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-07-20 05:46:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:46:02,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,602 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 05:46:02,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 05:46:02,602 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-07-20 05:46:02,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968989293] [2020-07-20 05:46:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,639 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 05:46:02,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968989293] [2020-07-20 05:46:02,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596842161] [2020-07-20 05:46:02,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,643 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-07-20 05:46:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,674 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-07-20 05:46:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 05:46:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,679 INFO L225 Difference]: With dead ends: 1164 [2020-07-20 05:46:02,679 INFO L226 Difference]: Without dead ends: 794 [2020-07-20 05:46:02,683 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 05:46:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-07-20 05:46:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-07-20 05:46:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-07-20 05:46:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-07-20 05:46:02,713 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-07-20 05:46:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,713 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-07-20 05:46:02,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-07-20 05:46:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:46:02,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,716 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 05:46:02,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 05:46:02,716 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-07-20 05:46:02,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147228579] [2020-07-20 05:46:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,761 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 05:46:02,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147228579] [2020-07-20 05:46:02,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107176920] [2020-07-20 05:46:02,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,766 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-07-20 05:46:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,809 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-07-20 05:46:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 05:46:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,817 INFO L225 Difference]: With dead ends: 1356 [2020-07-20 05:46:02,818 INFO L226 Difference]: Without dead ends: 1354 [2020-07-20 05:46:02,819 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 05:46:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-20 05:46:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-07-20 05:46:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-07-20 05:46:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-07-20 05:46:02,878 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-07-20 05:46:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:02,878 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-07-20 05:46:02,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-07-20 05:46:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 05:46:02,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:02,881 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 05:46:02,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 05:46:02,881 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-07-20 05:46:02,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:02,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500031819] [2020-07-20 05:46:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:02,904 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 05:46:02,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500031819] [2020-07-20 05:46:02,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:02,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:02,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938336639] [2020-07-20 05:46:02,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:02,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:02,906 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-07-20 05:46:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:02,965 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-07-20 05:46:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:02,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 05:46:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:02,976 INFO L225 Difference]: With dead ends: 2636 [2020-07-20 05:46:02,976 INFO L226 Difference]: Without dead ends: 1514 [2020-07-20 05:46:02,980 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 05:46:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-07-20 05:46:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-07-20 05:46:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-07-20 05:46:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-07-20 05:46:03,050 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-07-20 05:46:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:03,051 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-07-20 05:46:03,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-07-20 05:46:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:46:03,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:03,055 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 05:46:03,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 05:46:03,056 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-07-20 05:46:03,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:03,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414520061] [2020-07-20 05:46:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,082 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 05:46:03,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414520061] [2020-07-20 05:46:03,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:03,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:03,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119635810] [2020-07-20 05:46:03,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:03,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:03,089 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-07-20 05:46:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:03,150 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-07-20 05:46:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:03,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 05:46:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:03,161 INFO L225 Difference]: With dead ends: 2268 [2020-07-20 05:46:03,161 INFO L226 Difference]: Without dead ends: 1546 [2020-07-20 05:46:03,164 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 05:46:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-20 05:46:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-07-20 05:46:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-20 05:46:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-07-20 05:46:03,229 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-07-20 05:46:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:03,230 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-07-20 05:46:03,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-07-20 05:46:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:46:03,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:03,233 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 05:46:03,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-20 05:46:03,233 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-07-20 05:46:03,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:03,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069718449] [2020-07-20 05:46:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,266 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 05:46:03,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069718449] [2020-07-20 05:46:03,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:03,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:03,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144038364] [2020-07-20 05:46:03,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:03,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:03,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:03,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:03,268 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-07-20 05:46:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:03,325 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-07-20 05:46:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:03,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 05:46:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:03,337 INFO L225 Difference]: With dead ends: 2572 [2020-07-20 05:46:03,337 INFO L226 Difference]: Without dead ends: 2570 [2020-07-20 05:46:03,338 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 05:46:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-07-20 05:46:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-07-20 05:46:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-07-20 05:46:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-07-20 05:46:03,412 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-07-20 05:46:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:03,412 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-07-20 05:46:03,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-07-20 05:46:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:46:03,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:03,417 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 05:46:03,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-20 05:46:03,417 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-07-20 05:46:03,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:03,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47124809] [2020-07-20 05:46:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,444 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 05:46:03,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47124809] [2020-07-20 05:46:03,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:03,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:03,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861360163] [2020-07-20 05:46:03,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:03,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:03,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:03,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:03,446 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-07-20 05:46:03,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:03,534 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-07-20 05:46:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:03,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 05:46:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:03,548 INFO L225 Difference]: With dead ends: 5196 [2020-07-20 05:46:03,549 INFO L226 Difference]: Without dead ends: 2954 [2020-07-20 05:46:03,553 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 05:46:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-07-20 05:46:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-07-20 05:46:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-07-20 05:46:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-07-20 05:46:03,646 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-07-20 05:46:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:03,646 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-07-20 05:46:03,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-07-20 05:46:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:46:03,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:03,651 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 05:46:03,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-20 05:46:03,652 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-07-20 05:46:03,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:03,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627499598] [2020-07-20 05:46:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,678 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 05:46:03,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627499598] [2020-07-20 05:46:03,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:03,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:03,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446956260] [2020-07-20 05:46:03,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:03,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:03,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:03,680 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-07-20 05:46:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:03,736 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-07-20 05:46:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:03,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 05:46:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:03,750 INFO L225 Difference]: With dead ends: 4428 [2020-07-20 05:46:03,751 INFO L226 Difference]: Without dead ends: 3018 [2020-07-20 05:46:03,754 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 05:46:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-07-20 05:46:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-07-20 05:46:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-20 05:46:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-07-20 05:46:03,844 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-07-20 05:46:03,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:03,844 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-07-20 05:46:03,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:03,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-07-20 05:46:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:46:03,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:03,849 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 05:46:03,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 05:46:03,850 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:03,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:03,850 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-07-20 05:46:03,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:03,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569051481] [2020-07-20 05:46:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:03,869 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 05:46:03,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569051481] [2020-07-20 05:46:03,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:03,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:03,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739160251] [2020-07-20 05:46:03,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:03,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:03,872 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-07-20 05:46:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:04,003 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-07-20 05:46:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:04,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 05:46:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:04,017 INFO L225 Difference]: With dead ends: 8650 [2020-07-20 05:46:04,017 INFO L226 Difference]: Without dead ends: 3016 [2020-07-20 05:46:04,031 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 05:46:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-07-20 05:46:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-07-20 05:46:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-20 05:46:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-07-20 05:46:04,122 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-07-20 05:46:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:04,122 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-07-20 05:46:04,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-07-20 05:46:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 05:46:04,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:04,127 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 05:46:04,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 05:46:04,129 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:04,130 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-07-20 05:46:04,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:04,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781228195] [2020-07-20 05:46:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36b095a0 [2020-07-20 05:46:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:04,153 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 05:46:04,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781228195] [2020-07-20 05:46:04,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:04,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:46:04,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361639833] [2020-07-20 05:46:04,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:46:04,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:46:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:46:04,156 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-07-20 05:46:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:04,200 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-07-20 05:46:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:46:04,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 05:46:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:04,201 INFO L225 Difference]: With dead ends: 3016 [2020-07-20 05:46:04,201 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:46:04,206 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 05:46:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:46:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:46:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:46:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:46:04,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 05:46:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:04,207 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:46:04,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:46:04,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:46:04,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:46:04,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-20 05:46:04,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:46:04,242 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:46:04,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:46:04,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:46:04,242 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:46:04,243 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:46:04,243 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:46:04,243 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-07-20 05:46:04,243 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-07-20 05:46:04,243 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,244 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-07-20 05:46:04,244 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,245 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-07-20 05:46:04,245 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,245 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,246 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-07-20 05:46:04,246 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-07-20 05:46:04,246 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-07-20 05:46:04,246 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-07-20 05:46:04,247 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-07-20 05:46:04,248 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,248 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,248 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,248 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,248 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-07-20 05:46:04,249 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,249 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-07-20 05:46:04,249 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-07-20 05:46:04,249 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,249 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,250 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-07-20 05:46:04,250 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-07-20 05:46:04,250 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,250 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-07-20 05:46:04,250 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,250 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,251 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-07-20 05:46:04,251 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-07-20 05:46:04,251 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 05:46:04,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:46:04 BoogieIcfgContainer [2020-07-20 05:46:04,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:46:04,271 INFO L168 Benchmark]: Toolchain (without parser) took 4265.09 ms. Allocated memory was 138.4 MB in the beginning and 294.6 MB in the end (delta: 156.2 MB). Free memory was 102.5 MB in the beginning and 186.2 MB in the end (delta: -83.8 MB). Peak memory consumption was 72.5 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:04,271 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 05:46:04,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.18 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 180.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:04,273 INFO L168 Benchmark]: Boogie Preprocessor took 37.76 ms. Allocated memory is still 201.3 MB. Free memory was 180.6 MB in the beginning and 178.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:04,274 INFO L168 Benchmark]: RCFGBuilder took 379.27 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 160.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:04,275 INFO L168 Benchmark]: TraceAbstraction took 3493.85 ms. Allocated memory was 201.3 MB in the beginning and 294.6 MB in the end (delta: 93.3 MB). Free memory was 160.8 MB in the beginning and 186.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 67.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:04,286 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.18 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 180.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.76 ms. Allocated memory is still 201.3 MB. Free memory was 180.6 MB in the beginning and 178.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.27 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 160.8 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3493.85 ms. Allocated memory was 201.3 MB in the beginning and 294.6 MB in the end (delta: 93.3 MB). Free memory was 160.8 MB in the beginning and 186.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 67.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 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, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...