/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/Problem15_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:35,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:35,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:35,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:15:35,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:15:35,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:15:35,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:15:35,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:15:35,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:15:35,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:15:35,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:15:35,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:15:35,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:35,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:35,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:35,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:35,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:35,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:35,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:35,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:35,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:35,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:35,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:35,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:35,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:35,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:35,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:35,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:35,864 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 19:15:35,879 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:35,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:35,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:35,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:35,881 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:35,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:35,881 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:35,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:35,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:35,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:35,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:35,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:35,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:35,882 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:35,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:35,883 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:35,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:35,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:35,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:35,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:35,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:35,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:35,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:35,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:35,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:35,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:35,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:35,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:35,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:36,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:36,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:36,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:36,182 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:36,182 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:36,183 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-11-06 19:15:36,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e94ba535/850ba6c637ce44f7b7269661d20aaee0/FLAG351106223 [2019-11-06 19:15:36,962 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:36,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-11-06 19:15:36,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e94ba535/850ba6c637ce44f7b7269661d20aaee0/FLAG351106223 [2019-11-06 19:15:37,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e94ba535/850ba6c637ce44f7b7269661d20aaee0 [2019-11-06 19:15:37,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:37,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:37,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:37,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:37,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:37,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5747fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:37, skipping insertion in model container [2019-11-06 19:15:37,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:37" (1/1) ... [2019-11-06 19:15:37,115 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:37,204 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:38,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:38,242 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:38,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:38,550 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:38,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38 WrapperNode [2019-11-06 19:15:38,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:38,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:38,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:38,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:38,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (1/1) ... [2019-11-06 19:15:38,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:38,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:38,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:38,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:38,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (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 19:15:38,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:38,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:38,892 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:38,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:38,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:38,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:42,476 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:42,477 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:42,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:42 BoogieIcfgContainer [2019-11-06 19:15:42,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:42,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:42,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:42,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:42,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:37" (1/3) ... [2019-11-06 19:15:42,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109136a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:42, skipping insertion in model container [2019-11-06 19:15:42,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:38" (2/3) ... [2019-11-06 19:15:42,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109136a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:42, skipping insertion in model container [2019-11-06 19:15:42,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:42" (3/3) ... [2019-11-06 19:15:42,502 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2019-11-06 19:15:42,521 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:42,536 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:42,552 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:42,609 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:42,610 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:42,610 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:42,610 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:42,611 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:42,611 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:42,611 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:42,611 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 19:15:42,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:42,675 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] [2019-11-06 19:15:42,679 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1150521477, now seen corresponding path program 1 times [2019-11-06 19:15:42,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:42,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954722065] [2019-11-06 19:15:42,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:43,152 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 19:15:43,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954722065] [2019-11-06 19:15:43,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:43,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:43,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173044739] [2019-11-06 19:15:43,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:43,161 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:43,180 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:15:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:49,762 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-11-06 19:15:49,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:49,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-06 19:15:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:49,800 INFO L225 Difference]: With dead ends: 1575 [2019-11-06 19:15:49,800 INFO L226 Difference]: Without dead ends: 1055 [2019-11-06 19:15:49,817 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 19:15:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-11-06 19:15:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-11-06 19:15:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-11-06 19:15:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-11-06 19:15:49,961 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 23 [2019-11-06 19:15:49,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:49,961 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-11-06 19:15:49,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-11-06 19:15:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 19:15:49,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:49,971 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:15:49,971 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:49,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:49,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1552013474, now seen corresponding path program 1 times [2019-11-06 19:15:49,972 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:49,973 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904970014] [2019-11-06 19:15:49,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:50,277 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904970014] [2019-11-06 19:15:50,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354347571] [2019-11-06 19:15:50,278 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 19:15:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:50,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:50,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:50,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:50,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 19:15:50,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028396384] [2019-11-06 19:15:50,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:50,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:50,468 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-11-06 19:15:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:52,673 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-11-06 19:15:52,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:52,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-11-06 19:15:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:52,687 INFO L225 Difference]: With dead ends: 2976 [2019-11-06 19:15:52,688 INFO L226 Difference]: Without dead ends: 1958 [2019-11-06 19:15:52,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:15:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-11-06 19:15:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-11-06 19:15:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-11-06 19:15:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-11-06 19:15:52,785 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 92 [2019-11-06 19:15:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:52,787 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-11-06 19:15:52,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-11-06 19:15:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 19:15:52,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:52,801 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:15:53,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:53,010 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:53,010 INFO L82 PathProgramCache]: Analyzing trace with hash 317241164, now seen corresponding path program 1 times [2019-11-06 19:15:53,011 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:53,011 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278610530] [2019-11-06 19:15:53,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:53,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278610530] [2019-11-06 19:15:53,338 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:53,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:15:53,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886781659] [2019-11-06 19:15:53,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:15:53,344 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:15:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:53,345 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-11-06 19:15:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:59,628 INFO L93 Difference]: Finished difference Result 5861 states and 8774 transitions. [2019-11-06 19:15:59,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:15:59,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 109 [2019-11-06 19:15:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:59,650 INFO L225 Difference]: With dead ends: 5861 [2019-11-06 19:15:59,650 INFO L226 Difference]: Without dead ends: 3912 [2019-11-06 19:15:59,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2019-11-06 19:15:59,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 2934. [2019-11-06 19:15:59,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-11-06 19:15:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-11-06 19:15:59,755 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 109 [2019-11-06 19:15:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:59,756 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-11-06 19:15:59,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:15:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-11-06 19:15:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-11-06 19:15:59,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:59,761 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:15:59,761 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash 993341937, now seen corresponding path program 1 times [2019-11-06 19:15:59,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:59,762 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479254585] [2019-11-06 19:15:59,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:16:00,364 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479254585] [2019-11-06 19:16:00,364 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676316163] [2019-11-06 19:16:00,364 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 [2019-11-06 19:16:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:00,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:16:00,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:16:00,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:00,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 19:16:00,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576525076] [2019-11-06 19:16:00,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:16:00,689 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:00,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:16:00,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:00,689 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 8 states. [2019-11-06 19:16:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:06,965 INFO L93 Difference]: Finished difference Result 9968 states and 14056 transitions. [2019-11-06 19:16:06,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:16:06,967 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 297 [2019-11-06 19:16:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:07,009 INFO L225 Difference]: With dead ends: 9968 [2019-11-06 19:16:07,011 INFO L226 Difference]: Without dead ends: 7040 [2019-11-06 19:16:07,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7040 states. [2019-11-06 19:16:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7040 to 6406. [2019-11-06 19:16:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6406 states. [2019-11-06 19:16:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 8425 transitions. [2019-11-06 19:16:07,219 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 8425 transitions. Word has length 297 [2019-11-06 19:16:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:07,222 INFO L462 AbstractCegarLoop]: Abstraction has 6406 states and 8425 transitions. [2019-11-06 19:16:07,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 8425 transitions. [2019-11-06 19:16:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2019-11-06 19:16:07,229 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:07,231 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:07,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:07,435 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:07,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2040498893, now seen corresponding path program 1 times [2019-11-06 19:16:07,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:07,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386244975] [2019-11-06 19:16:07,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 19:16:07,861 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386244975] [2019-11-06 19:16:07,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:16:07,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:16:07,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568177292] [2019-11-06 19:16:07,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 19:16:07,863 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 19:16:07,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:16:07,864 INFO L87 Difference]: Start difference. First operand 6406 states and 8425 transitions. Second operand 6 states. [2019-11-06 19:16:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:12,961 INFO L93 Difference]: Finished difference Result 15941 states and 21728 transitions. [2019-11-06 19:16:12,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:12,962 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 349 [2019-11-06 19:16:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:13,004 INFO L225 Difference]: With dead ends: 15941 [2019-11-06 19:16:13,004 INFO L226 Difference]: Without dead ends: 9541 [2019-11-06 19:16:13,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:16:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2019-11-06 19:16:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8603. [2019-11-06 19:16:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8603 states. [2019-11-06 19:16:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 10794 transitions. [2019-11-06 19:16:13,215 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 10794 transitions. Word has length 349 [2019-11-06 19:16:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:13,216 INFO L462 AbstractCegarLoop]: Abstraction has 8603 states and 10794 transitions. [2019-11-06 19:16:13,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 19:16:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 10794 transitions. [2019-11-06 19:16:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2019-11-06 19:16:13,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:13,225 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:16:13,225 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:13,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1962388647, now seen corresponding path program 1 times [2019-11-06 19:16:13,226 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:13,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748881183] [2019-11-06 19:16:13,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat