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/Problem16_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:15,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:15,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:15,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:15,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:15,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:15,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:15,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:15,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:15,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:15,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:15,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:15,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:15,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:15,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:15,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:15,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:15,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:15,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:15,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:15,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:15,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:15,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:15,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:15,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:15,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:15,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:15,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:15,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:15,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:15,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:15,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:15,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:15,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:15,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:15,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:15,570 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 18:05:15,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:15,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:15,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:15,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:15,606 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:15,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:15,607 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:15,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:15,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:15,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:15,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:15,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:15,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:15,610 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:15,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:15,610 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:15,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:15,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:15,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:15,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:15,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:15,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:15,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:15,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:15,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:15,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:15,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:15,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:15,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:15,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:15,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:15,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:15,937 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:15,938 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:15,938 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-10-13 18:05:16,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b3a32d04/49a8c106ee1d45febd590ae763dc1aee/FLAG4a4e8c7fe [2019-10-13 18:05:16,669 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:16,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-10-13 18:05:16,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b3a32d04/49a8c106ee1d45febd590ae763dc1aee/FLAG4a4e8c7fe [2019-10-13 18:05:16,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b3a32d04/49a8c106ee1d45febd590ae763dc1aee [2019-10-13 18:05:16,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:16,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:16,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:16,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:16,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:16,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:16" (1/1) ... [2019-10-13 18:05:16,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:16, skipping insertion in model container [2019-10-13 18:05:16,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:16" (1/1) ... [2019-10-13 18:05:16,915 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:16,986 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:17,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:17,746 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:17,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:18,016 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:18,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18 WrapperNode [2019-10-13 18:05:18,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:18,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:18,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:18,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:18,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (1/1) ... [2019-10-13 18:05:18,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:18,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:18,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:18,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:18,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (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 18:05:18,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:18,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:18,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:18,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:18,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:20,843 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:20,843 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:20,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:20 BoogieIcfgContainer [2019-10-13 18:05:20,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:20,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:20,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:20,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:20,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:16" (1/3) ... [2019-10-13 18:05:20,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:20, skipping insertion in model container [2019-10-13 18:05:20,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:18" (2/3) ... [2019-10-13 18:05:20,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:20, skipping insertion in model container [2019-10-13 18:05:20,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:20" (3/3) ... [2019-10-13 18:05:20,853 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label21.c [2019-10-13 18:05:20,864 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:20,872 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:20,884 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:20,926 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:20,926 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:20,926 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:20,927 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:20,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:20,927 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:20,927 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:20,927 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:20,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 18:05:20,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:20,981 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] [2019-10-13 18:05:20,984 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash -782110827, now seen corresponding path program 1 times [2019-10-13 18:05:21,000 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:21,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487876819] [2019-10-13 18:05:21,001 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:21,001 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:21,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,435 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 18:05:21,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487876819] [2019-10-13 18:05:21,436 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:21,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:21,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141978400] [2019-10-13 18:05:21,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:21,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:21,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:21,460 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:26,754 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:26,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:26,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-10-13 18:05:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:26,784 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:26,785 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:26,798 INFO L600 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 [2019-10-13 18:05:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-13 18:05:26,960 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 44 [2019-10-13 18:05:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:26,961 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-13 18:05:26,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-13 18:05:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-13 18:05:26,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:26,972 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, 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] [2019-10-13 18:05:26,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1818262613, now seen corresponding path program 1 times [2019-10-13 18:05:26,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:26,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667228520] [2019-10-13 18:05:26,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 74 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:27,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667228520] [2019-10-13 18:05:27,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200443862] [2019-10-13 18:05:27,573 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 18:05:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:27,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:27,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 18:05:27,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:27,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:27,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188497635] [2019-10-13 18:05:27,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:27,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:27,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:27,836 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-13 18:05:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:30,897 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-10-13 18:05:30,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:30,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2019-10-13 18:05:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:30,912 INFO L225 Difference]: With dead ends: 3129 [2019-10-13 18:05:30,912 INFO L226 Difference]: Without dead ends: 2104 [2019-10-13 18:05:30,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-10-13 18:05:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-10-13 18:05:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-13 18:05:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-10-13 18:05:30,988 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 226 [2019-10-13 18:05:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:30,989 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-10-13 18:05:30,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-10-13 18:05:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-13 18:05:30,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:30,998 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, 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, 1] [2019-10-13 18:05:31,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:31,204 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1261652084, now seen corresponding path program 1 times [2019-10-13 18:05:31,205 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:31,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3884764] [2019-10-13 18:05:31,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 74 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:31,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3884764] [2019-10-13 18:05:31,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990416273] [2019-10-13 18:05:31,568 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 18:05:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:31,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 18:05:31,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:31,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:31,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245082101] [2019-10-13 18:05:31,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:31,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:31,852 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-10-13 18:05:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:35,100 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-10-13 18:05:35,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:35,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2019-10-13 18:05:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:35,127 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 18:05:35,128 INFO L226 Difference]: Without dead ends: 4234 [2019-10-13 18:05:35,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-13 18:05:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-13 18:05:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-13 18:05:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-10-13 18:05:35,296 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 261 [2019-10-13 18:05:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:35,296 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-10-13 18:05:35,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-10-13 18:05:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-13 18:05:35,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:35,302 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, 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] [2019-10-13 18:05:35,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:35,507 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1804095668, now seen corresponding path program 1 times [2019-10-13 18:05:35,507 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:35,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855978474] [2019-10-13 18:05:35,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:35,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:35,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:35,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855978474] [2019-10-13 18:05:35,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289272865] [2019-10-13 18:05:35,885 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 18:05:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:35,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:36,069 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:36,070 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:36,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666446330] [2019-10-13 18:05:36,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:36,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:36,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:36,072 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-10-13 18:05:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:43,308 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-10-13 18:05:43,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:05:43,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 273 [2019-10-13 18:05:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:43,346 INFO L225 Difference]: With dead ends: 13272 [2019-10-13 18:05:43,346 INFO L226 Difference]: Without dead ends: 7642 [2019-10-13 18:05:43,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 281 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:05:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-13 18:05:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6238. [2019-10-13 18:05:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6238 states. [2019-10-13 18:05:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 7140 transitions. [2019-10-13 18:05:43,519 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 7140 transitions. Word has length 273 [2019-10-13 18:05:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:43,520 INFO L462 AbstractCegarLoop]: Abstraction has 6238 states and 7140 transitions. [2019-10-13 18:05:43,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:05:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 7140 transitions. [2019-10-13 18:05:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2019-10-13 18:05:43,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:43,534 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-10-13 18:05:43,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:43,738 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:43,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2134090324, now seen corresponding path program 1 times [2019-10-13 18:05:43,740 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:43,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984981907] [2019-10-13 18:05:43,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:43,741 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:43,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 148 proven. 293 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-10-13 18:05:44,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984981907] [2019-10-13 18:05:44,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633204642] [2019-10-13 18:05:44,416 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 18:05:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:44,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2019-10-13 18:05:44,931 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:44,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:44,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345092425] [2019-10-13 18:05:44,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:44,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:44,942 INFO L87 Difference]: Start difference. First operand 6238 states and 7140 transitions. Second operand 5 states. [2019-10-13 18:05:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:46,751 INFO L93 Difference]: Finished difference Result 13848 states and 15883 transitions. [2019-10-13 18:05:46,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:46,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2019-10-13 18:05:46,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:46,781 INFO L225 Difference]: With dead ends: 13848 [2019-10-13 18:05:46,781 INFO L226 Difference]: Without dead ends: 7616 [2019-10-13 18:05:46,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 491 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-10-13 18:05:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7600. [2019-10-13 18:05:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7600 states. [2019-10-13 18:05:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7600 states to 7600 states and 8425 transitions. [2019-10-13 18:05:46,959 INFO L78 Accepts]: Start accepts. Automaton has 7600 states and 8425 transitions. Word has length 487 [2019-10-13 18:05:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:46,961 INFO L462 AbstractCegarLoop]: Abstraction has 7600 states and 8425 transitions. [2019-10-13 18:05:46,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7600 states and 8425 transitions. [2019-10-13 18:05:46,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2019-10-13 18:05:46,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:46,981 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:47,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:47,186 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1663829424, now seen corresponding path program 1 times [2019-10-13 18:05:47,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:47,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044260798] [2019-10-13 18:05:47,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:47,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:47,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 268 proven. 189 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-13 18:05:48,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044260798] [2019-10-13 18:05:48,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282230342] [2019-10-13 18:05:48,328 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 18:05:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:48,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 571 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-10-13 18:05:48,752 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:48,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:48,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122045626] [2019-10-13 18:05:48,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:48,755 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:48,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:48,756 INFO L87 Difference]: Start difference. First operand 7600 states and 8425 transitions. Second operand 11 states.