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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:58:03,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:58:03,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:58:03,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:58:03,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:58:03,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:58:03,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:58:03,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:58:03,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:58:03,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:58:03,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:58:03,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:58:03,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:58:03,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:58:03,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:58:03,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:58:03,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:58:03,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:58:03,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:58:03,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:58:03,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:58:03,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:58:03,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:58:03,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:58:03,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:58:03,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:58:03,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:58:03,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:58:03,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:58:03,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:58:03,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:58:03,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:58:03,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:58:03,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:58:03,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:58:03,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:58:03,389 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 [2019-10-13 17:58:03,403 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:58:03,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:58:03,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:58:03,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:58:03,405 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:58:03,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:58:03,406 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:58:03,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:58:03,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:58:03,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:58:03,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:58:03,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:58:03,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:58:03,407 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:58:03,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:58:03,407 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:58:03,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:58:03,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:58:03,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:58:03,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:58:03,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:58:03,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:58:03,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:58:03,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:58:03,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:58:03,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:58:03,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:58:03,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:58:03,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:58:03,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:58:03,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:58:03,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:58:03,753 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:58:03,754 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:58:03,755 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-13 17:58:03,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14166cb15/1230872cffe34b80a53c06f7ba9c0ed0/FLAG3212d3b63 [2019-10-13 17:58:04,470 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:58:04,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-13 17:58:04,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14166cb15/1230872cffe34b80a53c06f7ba9c0ed0/FLAG3212d3b63 [2019-10-13 17:58:04,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14166cb15/1230872cffe34b80a53c06f7ba9c0ed0 [2019-10-13 17:58:04,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:58:04,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:58:04,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:58:04,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:58:04,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:58:04,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:58:04" (1/1) ... [2019-10-13 17:58:04,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4bcf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:04, skipping insertion in model container [2019-10-13 17:58:04,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:58:04" (1/1) ... [2019-10-13 17:58:04,772 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:58:04,832 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:58:05,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:58:05,354 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:58:05,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:58:05,517 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:58:05,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05 WrapperNode [2019-10-13 17:58:05,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:58:05,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:58:05,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:58:05,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:58:05,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (1/1) ... [2019-10-13 17:58:05,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:58:05,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:58:05,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:58:05,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:58:05,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (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 [2019-10-13 17:58:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:58:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:58:05,746 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:58:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:58:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:58:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:58:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:58:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:58:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:58:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:58:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:58:07,417 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:58:07,417 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:58:07,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:58:07 BoogieIcfgContainer [2019-10-13 17:58:07,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:58:07,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:58:07,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:58:07,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:58:07,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:58:04" (1/3) ... [2019-10-13 17:58:07,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cd60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:58:07, skipping insertion in model container [2019-10-13 17:58:07,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:05" (2/3) ... [2019-10-13 17:58:07,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37cd60c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:58:07, skipping insertion in model container [2019-10-13 17:58:07,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:58:07" (3/3) ... [2019-10-13 17:58:07,429 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label25.c [2019-10-13 17:58:07,439 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:58:07,449 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:58:07,461 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:58:07,502 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:58:07,502 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:58:07,502 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:58:07,502 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:58:07,503 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:58:07,503 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:58:07,503 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:58:07,503 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:58:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:58:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:58:07,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:07,553 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:07,555 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:07,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1015003737, now seen corresponding path program 1 times [2019-10-13 17:58:07,570 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:07,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294334904] [2019-10-13 17:58:07,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:07,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:07,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:08,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294334904] [2019-10-13 17:58:08,069 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:08,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:58:08,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947591711] [2019-10-13 17:58:08,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:08,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:08,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:08,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:58:08,101 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:58:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:10,405 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-13 17:58:10,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:10,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2019-10-13 17:58:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:10,428 INFO L225 Difference]: With dead ends: 730 [2019-10-13 17:58:10,428 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:58:10,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:58:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-13 17:58:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-13 17:58:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2019-10-13 17:58:10,529 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 70 [2019-10-13 17:58:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:10,530 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2019-10-13 17:58:10,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2019-10-13 17:58:10,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 17:58:10,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:10,539 INFO L380 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, 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] [2019-10-13 17:58:10,539 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:10,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1516573211, now seen corresponding path program 1 times [2019-10-13 17:58:10,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:10,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301479958] [2019-10-13 17:58:10,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:10,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:10,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:10,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301479958] [2019-10-13 17:58:10,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634482528] [2019-10-13 17:58:10,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:58:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:10,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:11,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:11,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:11,077 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:58:11,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005913726] [2019-10-13 17:58:11,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:58:11,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:58:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:11,080 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand 3 states. [2019-10-13 17:58:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:11,700 INFO L93 Difference]: Finished difference Result 880 states and 1198 transitions. [2019-10-13 17:58:11,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:58:11,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-13 17:58:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:11,710 INFO L225 Difference]: With dead ends: 880 [2019-10-13 17:58:11,711 INFO L226 Difference]: Without dead ends: 878 [2019-10-13 17:58:11,712 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-10-13 17:58:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 735. [2019-10-13 17:58:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2019-10-13 17:58:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1029 transitions. [2019-10-13 17:58:11,772 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1029 transitions. Word has length 149 [2019-10-13 17:58:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:11,773 INFO L462 AbstractCegarLoop]: Abstraction has 735 states and 1029 transitions. [2019-10-13 17:58:11,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:58:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1029 transitions. [2019-10-13 17:58:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-13 17:58:11,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:11,779 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:11,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:11,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2032612418, now seen corresponding path program 1 times [2019-10-13 17:58:11,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:11,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070564877] [2019-10-13 17:58:11,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:11,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:11,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:12,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070564877] [2019-10-13 17:58:12,327 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:12,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:58:12,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664042605] [2019-10-13 17:58:12,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:58:12,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:12,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:58:12,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:58:12,339 INFO L87 Difference]: Start difference. First operand 735 states and 1029 transitions. Second operand 9 states. [2019-10-13 17:58:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:13,727 INFO L93 Difference]: Finished difference Result 1790 states and 2576 transitions. [2019-10-13 17:58:13,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:58:13,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 192 [2019-10-13 17:58:13,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:13,740 INFO L225 Difference]: With dead ends: 1790 [2019-10-13 17:58:13,740 INFO L226 Difference]: Without dead ends: 1061 [2019-10-13 17:58:13,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:58:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2019-10-13 17:58:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1035. [2019-10-13 17:58:13,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1035 states. [2019-10-13 17:58:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1359 transitions. [2019-10-13 17:58:13,785 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1359 transitions. Word has length 192 [2019-10-13 17:58:13,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:13,785 INFO L462 AbstractCegarLoop]: Abstraction has 1035 states and 1359 transitions. [2019-10-13 17:58:13,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:58:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1359 transitions. [2019-10-13 17:58:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 17:58:13,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:13,790 INFO L380 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, 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, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:58:13,790 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2039130987, now seen corresponding path program 1 times [2019-10-13 17:58:13,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:13,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528628936] [2019-10-13 17:58:13,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:13,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:13,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:14,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528628936] [2019-10-13 17:58:14,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232201900] [2019-10-13 17:58:14,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:14,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:14,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:14,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:58:14,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116237977] [2019-10-13 17:58:14,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:58:14,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:14,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:58:14,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:58:14,407 INFO L87 Difference]: Start difference. First operand 1035 states and 1359 transitions. Second operand 11 states. [2019-10-13 17:58:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:17,570 INFO L93 Difference]: Finished difference Result 2601 states and 3691 transitions. [2019-10-13 17:58:17,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:58:17,570 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-10-13 17:58:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:17,591 INFO L225 Difference]: With dead ends: 2601 [2019-10-13 17:58:17,592 INFO L226 Difference]: Without dead ends: 1572 [2019-10-13 17:58:17,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:58:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2019-10-13 17:58:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1240. [2019-10-13 17:58:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2019-10-13 17:58:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1602 transitions. [2019-10-13 17:58:17,691 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1602 transitions. Word has length 222 [2019-10-13 17:58:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:17,693 INFO L462 AbstractCegarLoop]: Abstraction has 1240 states and 1602 transitions. [2019-10-13 17:58:17,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:58:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1602 transitions. [2019-10-13 17:58:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-13 17:58:17,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:17,701 INFO L380 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, 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, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:58:17,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:17,906 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1907264308, now seen corresponding path program 1 times [2019-10-13 17:58:17,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:17,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529562743] [2019-10-13 17:58:17,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:17,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:17,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 200 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:18,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529562743] [2019-10-13 17:58:18,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447943774] [2019-10-13 17:58:18,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:18,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:18,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:18,446 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:18,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:58:18,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504969955] [2019-10-13 17:58:18,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:58:18,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:18,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:58:18,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:58:18,449 INFO L87 Difference]: Start difference. First operand 1240 states and 1602 transitions. Second operand 11 states. [2019-10-13 17:58:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:20,534 INFO L93 Difference]: Finished difference Result 2466 states and 3171 transitions. [2019-10-13 17:58:20,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:58:20,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 229 [2019-10-13 17:58:20,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:20,544 INFO L225 Difference]: With dead ends: 2466 [2019-10-13 17:58:20,544 INFO L226 Difference]: Without dead ends: 1232 [2019-10-13 17:58:20,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:58:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-13 17:58:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1208. [2019-10-13 17:58:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-13 17:58:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1475 transitions. [2019-10-13 17:58:20,590 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1475 transitions. Word has length 229 [2019-10-13 17:58:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:20,595 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1475 transitions. [2019-10-13 17:58:20,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:58:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1475 transitions. [2019-10-13 17:58:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-13 17:58:20,600 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:20,600 INFO L380 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:20,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:20,813 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:20,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:20,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1889340864, now seen corresponding path program 1 times [2019-10-13 17:58:20,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:20,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000557903] [2019-10-13 17:58:20,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:20,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:20,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 202 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:21,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000557903] [2019-10-13 17:58:21,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860482222] [2019-10-13 17:58:21,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:58:21,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:58:21,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:21,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2019-10-13 17:58:21,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955084283] [2019-10-13 17:58:21,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:21,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:58:21,335 INFO L87 Difference]: Start difference. First operand 1208 states and 1475 transitions. Second operand 5 states. [2019-10-13 17:58:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:22,263 INFO L93 Difference]: Finished difference Result 2583 states and 3144 transitions. [2019-10-13 17:58:22,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:22,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2019-10-13 17:58:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:22,276 INFO L225 Difference]: With dead ends: 2583 [2019-10-13 17:58:22,276 INFO L226 Difference]: Without dead ends: 1381 [2019-10-13 17:58:22,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:58:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2019-10-13 17:58:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1355. [2019-10-13 17:58:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1355 states. [2019-10-13 17:58:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1633 transitions. [2019-10-13 17:58:22,321 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1633 transitions. Word has length 239 [2019-10-13 17:58:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:22,321 INFO L462 AbstractCegarLoop]: Abstraction has 1355 states and 1633 transitions. [2019-10-13 17:58:22,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1633 transitions. [2019-10-13 17:58:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-10-13 17:58:22,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:22,329 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:22,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:22,533 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1720584130, now seen corresponding path program 1 times [2019-10-13 17:58:22,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:22,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231323007] [2019-10-13 17:58:22,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:22,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:22,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 266 proven. 84 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 17:58:22,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231323007] [2019-10-13 17:58:22,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109328400] [2019-10-13 17:58:22,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:23,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:23,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 363 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:58:23,324 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:23,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-13 17:58:23,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766298910] [2019-10-13 17:58:23,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:58:23,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:58:23,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:58:23,327 INFO L87 Difference]: Start difference. First operand 1355 states and 1633 transitions. Second operand 13 states. [2019-10-13 17:58:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:26,873 INFO L93 Difference]: Finished difference Result 4160 states and 5073 transitions. [2019-10-13 17:58:26,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:58:26,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 318 [2019-10-13 17:58:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:26,882 INFO L225 Difference]: With dead ends: 4160 [2019-10-13 17:58:26,882 INFO L226 Difference]: Without dead ends: 1780 [2019-10-13 17:58:26,887 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:58:26,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2019-10-13 17:58:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1343. [2019-10-13 17:58:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2019-10-13 17:58:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1491 transitions. [2019-10-13 17:58:26,923 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1491 transitions. Word has length 318 [2019-10-13 17:58:26,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:26,923 INFO L462 AbstractCegarLoop]: Abstraction has 1343 states and 1491 transitions. [2019-10-13 17:58:26,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:58:26,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1491 transitions. [2019-10-13 17:58:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-10-13 17:58:26,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:26,931 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:58:27,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:27,136 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash -703978038, now seen corresponding path program 1 times [2019-10-13 17:58:27,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:27,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086198598] [2019-10-13 17:58:27,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:27,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:27,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 145 proven. 291 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:58:28,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086198598] [2019-10-13 17:58:28,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086580610] [2019-10-13 17:58:28,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:28,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:58:28,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:28,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:28,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms