/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 DAGSIZE --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/eca-rers2012/Problem10_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:46:57,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:46:57,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:46:57,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 03:46:57,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:46:57,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:46:57,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:46:57,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:46:57,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:46:57,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:46:57,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:46:57,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:46:57,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:46:57,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:46:57,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:46:57,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:46:57,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:46:57,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:46:57,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:46:57,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:46:57,939 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 03:46:57,962 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:46:57,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:46:57,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:46:57,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:46:57,966 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:46:57,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:46:57,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:46:57,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:46:57,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:46:57,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:46:57,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:46:57,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:46:57,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:46:57,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:46:57,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:46:57,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:46:57,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:46:57,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:46:57,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:46:57,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:46:57,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:46:57,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:46:57,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:46:57,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:46:57,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:46:57,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:46:57,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:46:57,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:46:57,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:46:57,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 03:46:58,280 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:46:58,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:46:58,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:46:58,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:46:58,309 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:46:58,310 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2020-07-20 03:46:58,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78953cf1/6b9738f9075a4813aa53cc59cecedfbc/FLAG17cc2ae4a [2020-07-20 03:46:58,973 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:46:58,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2020-07-20 03:46:58,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78953cf1/6b9738f9075a4813aa53cc59cecedfbc/FLAG17cc2ae4a [2020-07-20 03:46:59,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d78953cf1/6b9738f9075a4813aa53cc59cecedfbc [2020-07-20 03:46:59,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:46:59,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:46:59,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:46:59,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:46:59,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:46:59,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:46:59,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a602aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59, skipping insertion in model container [2020-07-20 03:46:59,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:46:59,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:46:59,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:46:59,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:46:59,743 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:46:59,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:46:59,977 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:46:59,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59 WrapperNode [2020-07-20 03:46:59,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:46:59,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:46:59,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:46:59,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:46:59,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:46:59,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:47:00,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:47:00,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:47:00,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:47:00,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:47:00,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... [2020-07-20 03:47:00,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:47:00,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:47:00,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:47:00,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:47:00,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:47:00,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:47:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:47:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 03:47:00,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:47:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 03:47:00,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:47:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:47:00,172 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 03:47:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:47:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:47:00,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:47:01,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:47:01,459 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 03:47:01,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:47:01 BoogieIcfgContainer [2020-07-20 03:47:01,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:47:01,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:47:01,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:47:01,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:47:01,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:46:59" (1/3) ... [2020-07-20 03:47:01,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecac44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:47:01, skipping insertion in model container [2020-07-20 03:47:01,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:46:59" (2/3) ... [2020-07-20 03:47:01,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecac44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:47:01, skipping insertion in model container [2020-07-20 03:47:01,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:47:01" (3/3) ... [2020-07-20 03:47:01,474 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label17.c [2020-07-20 03:47:01,486 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:47:01,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:47:01,508 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:47:01,535 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:47:01,536 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:47:01,536 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:47:01,536 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:47:01,536 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:47:01,536 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:47:01,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:47:01,537 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:47:01,560 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-20 03:47:01,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 03:47:01,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:47:01,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:47:01,570 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:47:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:47:01,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1025349313, now seen corresponding path program 1 times [2020-07-20 03:47:01,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:47:01,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623276781] [2020-07-20 03:47:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45ced546 [2020-07-20 03:47:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:01,953 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 03:47:01,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623276781] [2020-07-20 03:47:01,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:47:01,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 03:47:01,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110729754] [2020-07-20 03:47:01,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:47:01,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:47:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:47:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:47:01,981 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2020-07-20 03:47:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:47:04,082 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2020-07-20 03:47:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:47:04,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-20 03:47:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:47:04,111 INFO L225 Difference]: With dead ends: 730 [2020-07-20 03:47:04,112 INFO L226 Difference]: Without dead ends: 447 [2020-07-20 03:47:04,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:47:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-07-20 03:47:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2020-07-20 03:47:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-07-20 03:47:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 610 transitions. [2020-07-20 03:47:04,212 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 610 transitions. Word has length 36 [2020-07-20 03:47:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:47:04,212 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 610 transitions. [2020-07-20 03:47:04,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:47:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 610 transitions. [2020-07-20 03:47:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 03:47:04,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:47:04,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:47:04,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:47:04,220 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:47:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:47:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1899506355, now seen corresponding path program 1 times [2020-07-20 03:47:04,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:47:04,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042707783] [2020-07-20 03:47:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45ced546 [2020-07-20 03:47:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:47:04,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042707783] [2020-07-20 03:47:04,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:47:04,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 03:47:04,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617398307] [2020-07-20 03:47:04,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 03:47:04,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:47:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 03:47:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 03:47:04,741 INFO L87 Difference]: Start difference. First operand 443 states and 610 transitions. Second operand 7 states. [2020-07-20 03:47:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:47:06,071 INFO L93 Difference]: Finished difference Result 1037 states and 1405 transitions. [2020-07-20 03:47:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:47:06,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-07-20 03:47:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:47:06,079 INFO L225 Difference]: With dead ends: 1037 [2020-07-20 03:47:06,080 INFO L226 Difference]: Without dead ends: 600 [2020-07-20 03:47:06,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:47:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-07-20 03:47:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2020-07-20 03:47:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-07-20 03:47:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 778 transitions. [2020-07-20 03:47:06,139 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 778 transitions. Word has length 123 [2020-07-20 03:47:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:47:06,140 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 778 transitions. [2020-07-20 03:47:06,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 03:47:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 778 transitions. [2020-07-20 03:47:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 03:47:06,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:47:06,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:47:06,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:47:06,150 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:47:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:47:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1140420541, now seen corresponding path program 1 times [2020-07-20 03:47:06,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:47:06,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656035506] [2020-07-20 03:47:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45ced546 [2020-07-20 03:47:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:47:06,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656035506] [2020-07-20 03:47:06,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:47:06,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 03:47:06,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027306771] [2020-07-20 03:47:06,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:47:06,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:47:06,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:47:06,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:47:06,510 INFO L87 Difference]: Start difference. First operand 592 states and 778 transitions. Second operand 8 states. [2020-07-20 03:47:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:47:08,013 INFO L93 Difference]: Finished difference Result 1375 states and 1935 transitions. [2020-07-20 03:47:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:47:08,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-07-20 03:47:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:47:08,031 INFO L225 Difference]: With dead ends: 1375 [2020-07-20 03:47:08,032 INFO L226 Difference]: Without dead ends: 932 [2020-07-20 03:47:08,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:47:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2020-07-20 03:47:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 900. [2020-07-20 03:47:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-07-20 03:47:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1125 transitions. [2020-07-20 03:47:08,109 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1125 transitions. Word has length 131 [2020-07-20 03:47:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:47:08,112 INFO L479 AbstractCegarLoop]: Abstraction has 900 states and 1125 transitions. [2020-07-20 03:47:08,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:47:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1125 transitions. [2020-07-20 03:47:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-20 03:47:08,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:47:08,121 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:47:08,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 03:47:08,122 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:47:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:47:08,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1655898422, now seen corresponding path program 1 times [2020-07-20 03:47:08,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:47:08,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614026979] [2020-07-20 03:47:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45ced546 [2020-07-20 03:47:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:47:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 50 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-20 03:47:08,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614026979] [2020-07-20 03:47:08,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912381123] [2020-07-20 03:47:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@478fa24a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true