/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/eca-rers2012/Problem10_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:55:57,099 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 05:55:57,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:55:57,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:55:57,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:55:57,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:55:57,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:55:57,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:55:57,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:55:57,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:55:57,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:55:57,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:55:57,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:55:57,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:55:57,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:55:57,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:55:57,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:55:57,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:55:57,201 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 05:55:57,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:55:57,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:55:57,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:55:57,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:55:57,244 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:55:57,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:55:57,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:55:57,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:55:57,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:55:57,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:55:57,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:55:57,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:55:57,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:55:57,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:55:57,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:55:57,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:55:57,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:55:57,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:55:57,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:55:57,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:55:57,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:55:57,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:55:57,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:55:57,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:55:57,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:55:57,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:55:57,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:55:57,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:55:57,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:55:57,249 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 05:55:57,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:55:57,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:55:57,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:55:57,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:55:57,596 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:55:57,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2020-07-20 05:55:57,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebbbd6c72/8187a0ded2a046b097f90c8b814fcfa3/FLAGe8fbb44f0 [2020-07-20 05:55:58,194 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:55:58,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2020-07-20 05:55:58,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebbbd6c72/8187a0ded2a046b097f90c8b814fcfa3/FLAGe8fbb44f0 [2020-07-20 05:55:58,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebbbd6c72/8187a0ded2a046b097f90c8b814fcfa3 [2020-07-20 05:55:58,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:55:58,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:55:58,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:55:58,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:55:58,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:55:58,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:58" (1/1) ... [2020-07-20 05:55:58,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff9d8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:58, skipping insertion in model container [2020-07-20 05:55:58,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:55:58" (1/1) ... [2020-07-20 05:55:58,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:55:58,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:55:58,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:55:58,955 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:55:59,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:55:59,247 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:55:59,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59 WrapperNode [2020-07-20 05:55:59,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:55:59,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:55:59,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:55:59,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:55:59,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (1/1) ... [2020-07-20 05:55:59,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:55:59,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:55:59,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:55:59,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:55:59,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (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 05:55:59,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:55:59,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:55:59,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-20 05:55:59,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:55:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-20 05:55:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:55:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:55:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 05:55:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:55:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:55:59,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:56:01,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:56:01,022 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 05:56:01,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:01 BoogieIcfgContainer [2020-07-20 05:56:01,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:56:01,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:56:01,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:56:01,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:56:01,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:55:58" (1/3) ... [2020-07-20 05:56:01,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16333ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:01, skipping insertion in model container [2020-07-20 05:56:01,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:55:59" (2/3) ... [2020-07-20 05:56:01,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16333ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:01, skipping insertion in model container [2020-07-20 05:56:01,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:01" (3/3) ... [2020-07-20 05:56:01,043 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label17.c [2020-07-20 05:56:01,059 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:56:01,070 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:56:01,091 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:56:01,124 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:56:01,125 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:56:01,125 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:56:01,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:56:01,125 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:56:01,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:56:01,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:56:01,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:56:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-20 05:56:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 05:56:01,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:56:01,170 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 05:56:01,170 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:56:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:56:01,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1025349313, now seen corresponding path program 1 times [2020-07-20 05:56:01,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:56:01,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182911910] [2020-07-20 05:56:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc025c7 [2020-07-20 05:56:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:01,606 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 05:56:01,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182911910] [2020-07-20 05:56:01,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:56:01,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 05:56:01,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284011241] [2020-07-20 05:56:01,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:56:01,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:56:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:56:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:56:01,639 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2020-07-20 05:56:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:56:03,935 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2020-07-20 05:56:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:56:03,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-20 05:56:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:56:03,956 INFO L225 Difference]: With dead ends: 730 [2020-07-20 05:56:03,957 INFO L226 Difference]: Without dead ends: 447 [2020-07-20 05:56:03,968 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 05:56:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-07-20 05:56:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2020-07-20 05:56:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-07-20 05:56:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 610 transitions. [2020-07-20 05:56:04,063 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 610 transitions. Word has length 36 [2020-07-20 05:56:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:56:04,064 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 610 transitions. [2020-07-20 05:56:04,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:56:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 610 transitions. [2020-07-20 05:56:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-20 05:56:04,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:56:04,072 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 05:56:04,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:56:04,073 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:56:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:56:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1899506355, now seen corresponding path program 1 times [2020-07-20 05:56:04,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:56:04,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656123950] [2020-07-20 05:56:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc025c7 [2020-07-20 05:56:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:04,607 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 05:56:04,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656123950] [2020-07-20 05:56:04,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:56:04,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:56:04,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247666662] [2020-07-20 05:56:04,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:56:04,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:56:04,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:56:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:56:04,612 INFO L87 Difference]: Start difference. First operand 443 states and 610 transitions. Second operand 7 states. [2020-07-20 05:56:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:56:06,058 INFO L93 Difference]: Finished difference Result 1037 states and 1405 transitions. [2020-07-20 05:56:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:56:06,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-07-20 05:56:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:56:06,065 INFO L225 Difference]: With dead ends: 1037 [2020-07-20 05:56:06,065 INFO L226 Difference]: Without dead ends: 600 [2020-07-20 05:56:06,067 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 05:56:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-07-20 05:56:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 592. [2020-07-20 05:56:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-07-20 05:56:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 778 transitions. [2020-07-20 05:56:06,111 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 778 transitions. Word has length 123 [2020-07-20 05:56:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:56:06,112 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 778 transitions. [2020-07-20 05:56:06,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:56:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 778 transitions. [2020-07-20 05:56:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-20 05:56:06,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:56:06,119 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 05:56:06,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:56:06,120 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:56:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:56:06,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1140420541, now seen corresponding path program 1 times [2020-07-20 05:56:06,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:56:06,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685606462] [2020-07-20 05:56:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc025c7 [2020-07-20 05:56:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:06,344 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 05:56:06,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685606462] [2020-07-20 05:56:06,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:56:06,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 05:56:06,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789072731] [2020-07-20 05:56:06,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:56:06,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:56:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:56:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:56:06,354 INFO L87 Difference]: Start difference. First operand 592 states and 778 transitions. Second operand 8 states. [2020-07-20 05:56:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:56:08,043 INFO L93 Difference]: Finished difference Result 1375 states and 1935 transitions. [2020-07-20 05:56:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:56:08,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-07-20 05:56:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:56:08,056 INFO L225 Difference]: With dead ends: 1375 [2020-07-20 05:56:08,057 INFO L226 Difference]: Without dead ends: 932 [2020-07-20 05:56:08,059 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 05:56:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2020-07-20 05:56:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 900. [2020-07-20 05:56:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 900 states. [2020-07-20 05:56:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1125 transitions. [2020-07-20 05:56:08,111 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1125 transitions. Word has length 131 [2020-07-20 05:56:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:56:08,112 INFO L479 AbstractCegarLoop]: Abstraction has 900 states and 1125 transitions. [2020-07-20 05:56:08,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:56:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1125 transitions. [2020-07-20 05:56:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-07-20 05:56:08,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:56:08,124 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 05:56:08,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 05:56:08,125 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:56:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:56:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1655898422, now seen corresponding path program 1 times [2020-07-20 05:56:08,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:56:08,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517877290] [2020-07-20 05:56:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7bc025c7 [2020-07-20 05:56:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:08,472 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 05:56:08,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517877290] [2020-07-20 05:56:08,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487423623] [2020-07-20 05:56:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51a135d5 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