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/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:18,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:18,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:18,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:18,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:18,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:18,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:18,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:18,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:18,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:18,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:18,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:18,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:18,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:18,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:18,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:18,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:18,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:18,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:18,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:18,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:18,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:18,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:18,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:18,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:18,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:18,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:18,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:18,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:18,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:18,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:18,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:18,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:18,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:18,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:18,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:18,683 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 17:55:18,716 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:18,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:18,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:18,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:18,723 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:18,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:18,723 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:18,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:18,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:18,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:18,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:18,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:18,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:18,726 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:18,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:18,727 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:18,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:18,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:18,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:18,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:18,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:18,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:18,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:18,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:18,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:18,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:18,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:18,729 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:18,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:19,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:19,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:19,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:19,057 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:19,057 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:19,058 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-13 17:55:19,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63084d30c/e7bded8c10014cd9bb3ba0fd8649ed3f/FLAG4a460505f [2019-10-13 17:55:19,792 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:19,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-13 17:55:19,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63084d30c/e7bded8c10014cd9bb3ba0fd8649ed3f/FLAG4a460505f [2019-10-13 17:55:19,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63084d30c/e7bded8c10014cd9bb3ba0fd8649ed3f [2019-10-13 17:55:19,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:19,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:19,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:19,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:19,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:19,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:19" (1/1) ... [2019-10-13 17:55:19,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5171f16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:19, skipping insertion in model container [2019-10-13 17:55:19,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:19" (1/1) ... [2019-10-13 17:55:20,005 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:20,082 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:20,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:20,934 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:21,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:21,273 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:21,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21 WrapperNode [2019-10-13 17:55:21,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:21,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:21,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:21,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:21,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (1/1) ... [2019-10-13 17:55:21,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:21,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:21,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:21,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:21,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (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 17:55:21,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:21,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:21,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:21,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:23,567 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:23,567 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:23 BoogieIcfgContainer [2019-10-13 17:55:23,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:23,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:23,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:23,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:19" (1/3) ... [2019-10-13 17:55:23,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3694b503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:23, skipping insertion in model container [2019-10-13 17:55:23,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:21" (2/3) ... [2019-10-13 17:55:23,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3694b503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:23, skipping insertion in model container [2019-10-13 17:55:23,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:23" (3/3) ... [2019-10-13 17:55:23,582 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-10-13 17:55:23,597 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:23,606 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:23,617 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:23,647 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:23,648 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:23,648 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:23,648 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:23,648 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:23,648 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:23,649 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:23,649 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 17:55:23,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:23,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:23,695 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1944252984, now seen corresponding path program 1 times [2019-10-13 17:55:23,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:23,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122844086] [2019-10-13 17:55:23,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:23,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:23,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:24,626 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:24,726 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 17:55:24,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122844086] [2019-10-13 17:55:24,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:24,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:24,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481756957] [2019-10-13 17:55:24,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:24,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:24,751 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:24,956 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:28,328 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-13 17:55:28,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:55:28,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-13 17:55:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:28,365 INFO L225 Difference]: With dead ends: 845 [2019-10-13 17:55:28,365 INFO L226 Difference]: Without dead ends: 470 [2019-10-13 17:55:28,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:28,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-13 17:55:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-13 17:55:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-13 17:55:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-13 17:55:28,525 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 161 [2019-10-13 17:55:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:28,528 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-13 17:55:28,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-13 17:55:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 17:55:28,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:28,544 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:28,544 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1469747701, now seen corresponding path program 1 times [2019-10-13 17:55:28,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:28,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705914430] [2019-10-13 17:55:28,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:28,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:28,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:28,911 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:29,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705914430] [2019-10-13 17:55:29,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:29,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:29,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000195780] [2019-10-13 17:55:29,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:29,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:29,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:29,111 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-13 17:55:29,275 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:32,095 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:55:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:32,716 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-13 17:55:32,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:55:32,717 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 170 [2019-10-13 17:55:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:32,726 INFO L225 Difference]: With dead ends: 1407 [2019-10-13 17:55:32,727 INFO L226 Difference]: Without dead ends: 949 [2019-10-13 17:55:32,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:55:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-13 17:55:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-13 17:55:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-13 17:55:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-13 17:55:32,802 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 170 [2019-10-13 17:55:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:32,802 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-13 17:55:32,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-13 17:55:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 17:55:32,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:32,811 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:32,811 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:32,812 INFO L82 PathProgramCache]: Analyzing trace with hash 931269084, now seen corresponding path program 1 times [2019-10-13 17:55:32,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:32,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082099181] [2019-10-13 17:55:32,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:32,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:32,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:33,127 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:33,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082099181] [2019-10-13 17:55:33,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235080689] [2019-10-13 17:55:33,353 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 17:55:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:33,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:55:33,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:33,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:33,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-13 17:55:33,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370595776] [2019-10-13 17:55:33,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:33,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:33,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:33,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:33,973 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-13 17:55:35,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:35,496 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-13 17:55:35,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:35,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2019-10-13 17:55:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:35,510 INFO L225 Difference]: With dead ends: 2749 [2019-10-13 17:55:35,511 INFO L226 Difference]: Without dead ends: 1850 [2019-10-13 17:55:35,514 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-13 17:55:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-13 17:55:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-13 17:55:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-10-13 17:55:35,584 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 173 [2019-10-13 17:55:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:35,585 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-10-13 17:55:35,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-10-13 17:55:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 17:55:35,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:35,591 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:35,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:35,807 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash -771867422, now seen corresponding path program 1 times [2019-10-13 17:55:35,808 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:35,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416605824] [2019-10-13 17:55:35,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:35,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:35,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,084 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,240 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 17:55:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:55:36,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416605824] [2019-10-13 17:55:36,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402738003] [2019-10-13 17:55:36,347 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 17:55:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:36,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:55:36,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:55:36,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:36,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 17:55:36,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866092256] [2019-10-13 17:55:36,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:36,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:36,776 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-10-13 17:55:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:38,458 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-10-13 17:55:38,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:55:38,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-10-13 17:55:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:38,487 INFO L225 Difference]: With dead ends: 5485 [2019-10-13 17:55:38,488 INFO L226 Difference]: Without dead ends: 3675 [2019-10-13 17:55:38,496 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:55:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-10-13 17:55:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-10-13 17:55:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-10-13 17:55:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-10-13 17:55:38,650 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 180 [2019-10-13 17:55:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:38,650 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-10-13 17:55:38,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-10-13 17:55:38,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 17:55:38,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:38,661 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:38,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:38,869 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash -23696304, now seen corresponding path program 1 times [2019-10-13 17:55:38,870 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:38,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877915077] [2019-10-13 17:55:38,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:38,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:38,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,085 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:39,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877915077] [2019-10-13 17:55:39,254 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622846238] [2019-10-13 17:55:39,255 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 17:55:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:55:39,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:55:39,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:55:39,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:55:39,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298131303] [2019-10-13 17:55:39,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:55:39,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:55:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:39,599 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-10-13 17:55:39,815 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:40,150 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:40,514 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:40,917 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-13 17:55:43,255 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:51,351 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-10-13 17:55:51,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:55:51,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 191 [2019-10-13 17:55:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:51,467 INFO L225 Difference]: With dead ends: 15053 [2019-10-13 17:55:51,468 INFO L226 Difference]: Without dead ends: 11460 [2019-10-13 17:55:51,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:55:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-13 17:55:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-10-13 17:55:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-10-13 17:55:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-10-13 17:55:52,166 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 191 [2019-10-13 17:55:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:52,170 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-10-13 17:55:52,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:55:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-10-13 17:55:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 17:55:52,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:52,236 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:52,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:52,442 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash -124599840, now seen corresponding path program 1 times [2019-10-13 17:55:52,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:52,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622928160] [2019-10-13 17:55:52,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:52,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:52,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,671 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:52,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622928160] [2019-10-13 17:55:52,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590709101] [2019-10-13 17:55:52,962 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 17:55:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:53,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:53,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:55:53,217 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:53,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:55:53,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044607189] [2019-10-13 17:55:53,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:53,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:53,220 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 3 states.