/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/Problem17_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:41,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:41,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:41,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:41,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:41,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:41,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:41,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:41,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:41,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:41,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:41,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:41,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:41,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:41,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:41,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:41,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:41,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:41,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:41,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:41,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:41,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:41,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:41,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:41,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:41,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:41,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:41,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:41,921 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 19:19:41,945 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:41,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:41,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:41,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:41,948 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:41,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:41,949 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:41,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:41,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:41,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:41,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:41,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:41,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:41,951 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:41,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:41,952 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:41,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:41,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:41,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:41,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:41,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:41,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:41,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:41,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:41,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:41,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:41,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:41,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:41,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:42,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:42,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:42,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:42,252 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:42,252 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:42,253 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-11-06 19:19:42,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f657e5e3/e56b8d6fd0dc4c74a51f43af83109200/FLAGfacd7da8d [2019-11-06 19:19:43,046 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:43,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-11-06 19:19:43,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f657e5e3/e56b8d6fd0dc4c74a51f43af83109200/FLAGfacd7da8d [2019-11-06 19:19:43,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f657e5e3/e56b8d6fd0dc4c74a51f43af83109200 [2019-11-06 19:19:43,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:43,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:43,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:43,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:43,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:43,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:43" (1/1) ... [2019-11-06 19:19:43,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e5aa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:43, skipping insertion in model container [2019-11-06 19:19:43,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:43" (1/1) ... [2019-11-06 19:19:43,215 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:43,333 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:44,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:44,448 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:44,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:44,970 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:44,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44 WrapperNode [2019-11-06 19:19:44,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:44,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:44,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:44,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:44,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:44,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:45,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:45,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:45,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:45,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:45,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (1/1) ... [2019-11-06 19:19:45,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:45,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:45,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:45,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:45,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (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 19:19:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:45,314 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:45,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:45,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:45,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:45,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:49,768 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:49,768 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:49,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:49 BoogieIcfgContainer [2019-11-06 19:19:49,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:49,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:49,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:49,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:49,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:43" (1/3) ... [2019-11-06 19:19:49,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c08acc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:49, skipping insertion in model container [2019-11-06 19:19:49,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:44" (2/3) ... [2019-11-06 19:19:49,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c08acc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:49, skipping insertion in model container [2019-11-06 19:19:49,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:49" (3/3) ... [2019-11-06 19:19:49,779 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2019-11-06 19:19:49,789 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:49,798 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:49,809 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:49,855 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:49,856 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:49,856 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:49,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:49,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:49,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:49,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:49,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-11-06 19:19:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 19:19:49,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:49,911 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] [2019-11-06 19:19:49,914 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:49,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1223613225, now seen corresponding path program 1 times [2019-11-06 19:19:49,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:49,930 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104577280] [2019-11-06 19:19:49,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:50,276 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 19:19:50,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104577280] [2019-11-06 19:19:50,278 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:50,278 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:50,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919011035] [2019-11-06 19:19:50,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:50,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:50,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:50,305 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 5 states. [2019-11-06 19:20:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:00,113 INFO L93 Difference]: Finished difference Result 2154 states and 3991 transitions. [2019-11-06 19:20:00,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:20:00,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-11-06 19:20:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:00,143 INFO L225 Difference]: With dead ends: 2154 [2019-11-06 19:20:00,143 INFO L226 Difference]: Without dead ends: 1470 [2019-11-06 19:20:00,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:20:00,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2019-11-06 19:20:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1452. [2019-11-06 19:20:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2019-11-06 19:20:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2181 transitions. [2019-11-06 19:20:00,304 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2181 transitions. Word has length 26 [2019-11-06 19:20:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:00,306 INFO L462 AbstractCegarLoop]: Abstraction has 1452 states and 2181 transitions. [2019-11-06 19:20:00,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2181 transitions. [2019-11-06 19:20:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 19:20:00,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:00,321 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:00,321 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:00,322 INFO L82 PathProgramCache]: Analyzing trace with hash -255135052, now seen corresponding path program 1 times [2019-11-06 19:20:00,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:00,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898513363] [2019-11-06 19:20:00,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:00,661 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898513363] [2019-11-06 19:20:00,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:00,661 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:20:00,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969084215] [2019-11-06 19:20:00,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:20:00,667 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:20:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:20:00,668 INFO L87 Difference]: Start difference. First operand 1452 states and 2181 transitions. Second operand 8 states. [2019-11-06 19:20:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:10,686 INFO L93 Difference]: Finished difference Result 5611 states and 8599 transitions. [2019-11-06 19:20:10,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:20:10,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2019-11-06 19:20:10,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:10,713 INFO L225 Difference]: With dead ends: 5611 [2019-11-06 19:20:10,714 INFO L226 Difference]: Without dead ends: 4165 [2019-11-06 19:20:10,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:20:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2019-11-06 19:20:10,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3702. [2019-11-06 19:20:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3702 states. [2019-11-06 19:20:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 4881 transitions. [2019-11-06 19:20:10,846 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 4881 transitions. Word has length 97 [2019-11-06 19:20:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:10,847 INFO L462 AbstractCegarLoop]: Abstraction has 3702 states and 4881 transitions. [2019-11-06 19:20:10,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:20:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 4881 transitions. [2019-11-06 19:20:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 19:20:10,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:10,857 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:10,858 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash -414121280, now seen corresponding path program 1 times [2019-11-06 19:20:10,859 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:10,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445209323] [2019-11-06 19:20:10,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:11,216 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445209323] [2019-11-06 19:20:11,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094590135] [2019-11-06 19:20:11,217 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 19:20:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:11,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 19:20:11,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:11,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:20:11,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms