/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:10:48,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:10:48,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:10:48,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:10:48,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:10:48,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:10:48,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:10:48,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:10:48,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:10:48,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:10:48,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:10:48,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:10:48,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:10:48,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:10:48,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:10:48,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:10:48,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:10:48,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:10:48,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:10:48,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:10:48,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:10:48,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:10:48,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:10:48,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:10:48,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:10:48,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:10:48,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:10:48,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:10:48,525 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 [2019-11-06 19:10:48,541 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:10:48,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:10:48,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:10:48,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:10:48,543 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:10:48,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:10:48,544 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:10:48,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:10:48,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:10:48,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:10:48,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:10:48,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:10:48,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:10:48,545 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:10:48,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:10:48,546 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:10:48,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:10:48,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:10:48,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:10:48,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:10:48,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:10:48,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:10:48,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:10:48,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:10:48,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:10:48,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:10:48,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:10:48,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:10:48,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:10:48,814 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:10:48,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:10:48,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:10:48,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:10:48,839 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:10:48,840 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-11-06 19:10:48,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b4e66ad/6d456b9cdeb94a2ebbe6d5abdafcdf63/FLAG13567bb2d [2019-11-06 19:10:49,685 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:10:49,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-11-06 19:10:49,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b4e66ad/6d456b9cdeb94a2ebbe6d5abdafcdf63/FLAG13567bb2d [2019-11-06 19:10:50,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83b4e66ad/6d456b9cdeb94a2ebbe6d5abdafcdf63 [2019-11-06 19:10:50,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:10:50,236 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:10:50,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:50,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:10:50,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:10:50,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:50" (1/1) ... [2019-11-06 19:10:50,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1172a0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:50, skipping insertion in model container [2019-11-06 19:10:50,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:50" (1/1) ... [2019-11-06 19:10:50,253 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:10:50,400 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:10:52,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:52,013 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:10:52,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:52,659 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:10:52,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52 WrapperNode [2019-11-06 19:10:52,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:52,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:10:52,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:10:52,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:10:52,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (1/1) ... [2019-11-06 19:10:52,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:10:52,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:10:52,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:10:52,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:10:52,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (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 [2019-11-06 19:10:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:10:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:10:53,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:10:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:10:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:10:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 19:10:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:10:53,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:10:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:10:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:10:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 19:10:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:10:53,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:10:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:10:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:10:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:10:53,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:10:57,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:10:57,714 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:10:57,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:57 BoogieIcfgContainer [2019-11-06 19:10:57,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:10:57,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:10:57,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:10:57,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:10:57,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:10:50" (1/3) ... [2019-11-06 19:10:57,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb96dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:57, skipping insertion in model container [2019-11-06 19:10:57,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:52" (2/3) ... [2019-11-06 19:10:57,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb96dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:57, skipping insertion in model container [2019-11-06 19:10:57,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:57" (3/3) ... [2019-11-06 19:10:57,729 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2019-11-06 19:10:57,740 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:10:57,749 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:10:57,761 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:10:57,796 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:10:57,797 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:10:57,797 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:10:57,797 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:10:57,797 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:10:57,797 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:10:57,797 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:10:57,798 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:10:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 19:10:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 19:10:57,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:57,842 INFO L410 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] [2019-11-06 19:10:57,844 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1489686398, now seen corresponding path program 1 times [2019-11-06 19:10:57,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:57,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024758892] [2019-11-06 19:10:57,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:58,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024758892] [2019-11-06 19:10:58,263 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:58,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:10:58,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447078658] [2019-11-06 19:10:58,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:58,274 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:58,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:10:58,291 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-11-06 19:11:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:11:06,878 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-11-06 19:11:06,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:11:06,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-11-06 19:11:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:11:06,932 INFO L225 Difference]: With dead ends: 2471 [2019-11-06 19:11:06,932 INFO L226 Difference]: Without dead ends: 1568 [2019-11-06 19:11:06,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:11:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-11-06 19:11:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-11-06 19:11:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-11-06 19:11:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2833 transitions. [2019-11-06 19:11:07,182 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2833 transitions. Word has length 59 [2019-11-06 19:11:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:11:07,183 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2833 transitions. [2019-11-06 19:11:07,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:11:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2833 transitions. [2019-11-06 19:11:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 19:11:07,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:07,200 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:11:07,200 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1403229591, now seen corresponding path program 1 times [2019-11-06 19:11:07,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:07,202 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576599812] [2019-11-06 19:11:07,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:11:07,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576599812] [2019-11-06 19:11:07,522 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:11:07,522 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:11:07,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763725138] [2019-11-06 19:11:07,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:11:07,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:11:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:11:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:11:07,528 INFO L87 Difference]: Start difference. First operand 1553 states and 2833 transitions. Second operand 8 states. [2019-11-06 19:11:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:11:19,277 INFO L93 Difference]: Finished difference Result 4751 states and 8585 transitions. [2019-11-06 19:11:19,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:11:19,278 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-11-06 19:11:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:11:19,296 INFO L225 Difference]: With dead ends: 4751 [2019-11-06 19:11:19,296 INFO L226 Difference]: Without dead ends: 3204 [2019-11-06 19:11:19,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:11:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2019-11-06 19:11:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3149. [2019-11-06 19:11:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2019-11-06 19:11:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4657 transitions. [2019-11-06 19:11:19,427 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4657 transitions. Word has length 132 [2019-11-06 19:11:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:11:19,430 INFO L462 AbstractCegarLoop]: Abstraction has 3149 states and 4657 transitions. [2019-11-06 19:11:19,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:11:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4657 transitions. [2019-11-06 19:11:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:11:19,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:19,445 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:11:19,446 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash -612385541, now seen corresponding path program 1 times [2019-11-06 19:11:19,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:19,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898493769] [2019-11-06 19:11:19,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:11:19,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898493769] [2019-11-06 19:11:19,798 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368147828] [2019-11-06 19:11:19,798 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 [2019-11-06 19:11:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:19,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:11:19,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:11:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:11:20,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:11:20,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 19:11:20,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834870975] [2019-11-06 19:11:20,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:11:20,045 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:11:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:11:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:11:20,054 INFO L87 Difference]: Start difference. First operand 3149 states and 4657 transitions. Second operand 8 states.