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_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:25,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:25,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:25,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:25,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:25,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:25,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:25,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:25,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:25,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:25,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:25,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:25,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:25,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:25,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:25,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:25,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:25,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:25,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:25,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:25,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:25,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:25,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:25,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:25,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:25,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:25,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:25,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:25,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:25,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:25,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:25,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:25,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:25,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:25,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:25,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:25,791 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 [2019-10-14 21:54:25,811 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:25,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:25,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:25,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:25,813 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:25,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:25,813 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:25,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:25,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:25,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:25,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:25,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:25,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:25,816 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:25,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:25,816 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:25,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:25,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:25,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:25,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:25,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:25,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:25,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:25,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:25,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:25,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:25,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:25,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:25,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:26,110 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:26,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:26,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:26,137 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:26,138 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:26,139 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label30.c [2019-10-14 21:54:26,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdc83823/978f867fe7b94a11a15cdaf166bcf328/FLAG886d97ebc [2019-10-14 21:54:26,928 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:26,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label30.c [2019-10-14 21:54:26,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdc83823/978f867fe7b94a11a15cdaf166bcf328/FLAG886d97ebc [2019-10-14 21:54:27,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffdc83823/978f867fe7b94a11a15cdaf166bcf328 [2019-10-14 21:54:27,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:27,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:27,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:27,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:27,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:27,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:27" (1/1) ... [2019-10-14 21:54:27,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22443499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:27, skipping insertion in model container [2019-10-14 21:54:27,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:27" (1/1) ... [2019-10-14 21:54:27,098 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:27,186 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:28,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:28,035 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:28,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:28,404 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:28,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28 WrapperNode [2019-10-14 21:54:28,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:28,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:28,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:28,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:28,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (1/1) ... [2019-10-14 21:54:28,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:28,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:28,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:28,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:28,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (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 [2019-10-14 21:54:28,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:28,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:28,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:28,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:28,643 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:28,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:30,745 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:30,746 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:30,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:30 BoogieIcfgContainer [2019-10-14 21:54:30,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:30,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:30,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:30,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:30,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:27" (1/3) ... [2019-10-14 21:54:30,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38111fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:30, skipping insertion in model container [2019-10-14 21:54:30,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:28" (2/3) ... [2019-10-14 21:54:30,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38111fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:30, skipping insertion in model container [2019-10-14 21:54:30,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:30" (3/3) ... [2019-10-14 21:54:30,769 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label30.c [2019-10-14 21:54:30,785 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:30,796 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:30,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:30,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:30,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:30,867 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:30,868 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:30,868 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:30,868 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:30,868 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:30,868 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-14 21:54:30,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:30,938 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:30,940 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:30,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1701060184, now seen corresponding path program 1 times [2019-10-14 21:54:30,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:30,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949659579] [2019-10-14 21:54:30,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,952 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:32,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949659579] [2019-10-14 21:54:32,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:32,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:32,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060138839] [2019-10-14 21:54:32,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:32,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:32,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:32,104 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:32,335 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:35,397 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-14 21:54:35,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:54:35,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2019-10-14 21:54:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:35,433 INFO L225 Difference]: With dead ends: 845 [2019-10-14 21:54:35,433 INFO L226 Difference]: Without dead ends: 470 [2019-10-14 21:54:35,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-14 21:54:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-14 21:54:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-14 21:54:35,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-14 21:54:35,577 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 181 [2019-10-14 21:54:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:35,579 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-14 21:54:35,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-14 21:54:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 21:54:35,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:35,590 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:35,590 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:35,590 INFO L82 PathProgramCache]: Analyzing trace with hash 902086427, now seen corresponding path program 1 times [2019-10-14 21:54:35,591 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:35,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518807830] [2019-10-14 21:54:35,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:35,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:35,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,836 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:36,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518807830] [2019-10-14 21:54:36,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:36,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:36,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038085034] [2019-10-14 21:54:36,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:36,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:36,046 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-14 21:54:36,247 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:39,227 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:39,959 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-14 21:54:39,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:54:39,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 190 [2019-10-14 21:54:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:39,968 INFO L225 Difference]: With dead ends: 1407 [2019-10-14 21:54:39,969 INFO L226 Difference]: Without dead ends: 949 [2019-10-14 21:54:39,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-14 21:54:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-14 21:54:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-14 21:54:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-14 21:54:40,056 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 190 [2019-10-14 21:54:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:40,057 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-14 21:54:40,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-14 21:54:40,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 21:54:40,061 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:40,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:40,062 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash 73812076, now seen corresponding path program 1 times [2019-10-14 21:54:40,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:40,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473265313] [2019-10-14 21:54:40,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:40,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:40,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,352 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:40,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473265313] [2019-10-14 21:54:40,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508936700] [2019-10-14 21:54:40,599 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 [2019-10-14 21:54:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:40,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:41,063 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:41,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:54:41,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241452962] [2019-10-14 21:54:41,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:41,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:41,068 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-14 21:54:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:42,593 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-14 21:54:42,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:42,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 193 [2019-10-14 21:54:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:42,610 INFO L225 Difference]: With dead ends: 2749 [2019-10-14 21:54:42,610 INFO L226 Difference]: Without dead ends: 1850 [2019-10-14 21:54:42,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-14 21:54:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-14 21:54:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:54:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-10-14 21:54:42,705 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 193 [2019-10-14 21:54:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:42,706 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-10-14 21:54:42,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-10-14 21:54:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-14 21:54:42,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:42,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:42,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:42,931 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1298185330, now seen corresponding path program 1 times [2019-10-14 21:54:42,933 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:42,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315260699] [2019-10-14 21:54:42,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,246 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,407 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:43,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315260699] [2019-10-14 21:54:43,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643242494] [2019-10-14 21:54:43,517 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 [2019-10-14 21:54:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:43,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:54:43,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:43,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:54:43,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798647258] [2019-10-14 21:54:43,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:43,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:43,933 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-10-14 21:54:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:45,351 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-10-14 21:54:45,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:54:45,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2019-10-14 21:54:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:45,378 INFO L225 Difference]: With dead ends: 5485 [2019-10-14 21:54:45,378 INFO L226 Difference]: Without dead ends: 3675 [2019-10-14 21:54:45,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:54:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-10-14 21:54:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-10-14 21:54:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-10-14 21:54:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-10-14 21:54:45,539 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 200 [2019-10-14 21:54:45,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:45,541 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-10-14 21:54:45,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-10-14 21:54:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-14 21:54:45,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:45,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:45,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:45,761 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:45,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1127946016, now seen corresponding path program 1 times [2019-10-14 21:54:45,763 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:45,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468018658] [2019-10-14 21:54:45,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:45,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:45,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:45,992 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:46,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468018658] [2019-10-14 21:54:46,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059162914] [2019-10-14 21:54:46,186 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 [2019-10-14 21:54:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:54:46,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:54:46,527 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:46,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:46,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333929296] [2019-10-14 21:54:46,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:46,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:46,531 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-10-14 21:54:46,700 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:46,988 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:47,340 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:47,674 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:54:50,109 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:58,274 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-10-14 21:54:58,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:54:58,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 211 [2019-10-14 21:54:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:58,385 INFO L225 Difference]: With dead ends: 15053 [2019-10-14 21:54:58,385 INFO L226 Difference]: Without dead ends: 11460 [2019-10-14 21:54:58,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:54:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-14 21:54:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-10-14 21:54:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-10-14 21:54:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-10-14 21:54:59,093 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 211 [2019-10-14 21:54:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:59,102 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-10-14 21:54:59,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:54:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-10-14 21:54:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-14 21:54:59,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:59,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:59,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:59,375 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1068575120, now seen corresponding path program 1 times [2019-10-14 21:54:59,375 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:59,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609182574] [2019-10-14 21:54:59,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:59,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:59,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:59,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609182574] [2019-10-14 21:54:59,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442879283] [2019-10-14 21:54:59,783 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 [2019-10-14 21:55:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:00,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:55:00,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:00,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:00,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:55:00,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954770770] [2019-10-14 21:55:00,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:00,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:00,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:00,161 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 8 states. [2019-10-14 21:55:00,354 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:02,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:02,023 INFO L93 Difference]: Finished difference Result 22082 states and 36551 transitions. [2019-10-14 21:55:02,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:55:02,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2019-10-14 21:55:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:02,086 INFO L225 Difference]: With dead ends: 22082 [2019-10-14 21:55:02,087 INFO L226 Difference]: Without dead ends: 10914 [2019-10-14 21:55:02,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:55:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states.