/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/Problem18_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:21:45,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:21:45,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:21:45,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:21:45,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:21:45,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:21:45,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:21:45,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:21:45,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:21:45,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:21:45,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:21:45,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:21:45,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:21:45,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:21:45,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:21:45,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:21:45,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:21:45,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:21:45,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:21:45,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:21:45,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:21:45,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:21:45,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:21:45,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:21:45,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:21:45,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:21:45,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:21:45,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:21:45,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:21:45,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:21:45,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:21:45,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:21:45,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:21:45,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:21:45,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:21:45,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:21:45,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:21:45,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:21:45,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:21:45,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:21:45,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:21:45,306 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 19:21:45,320 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:21:45,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:21:45,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:21:45,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:21:45,322 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:21:45,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:21:45,323 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:21:45,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:21:45,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:21:45,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:21:45,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:21:45,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:21:45,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:21:45,324 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:21:45,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:21:45,324 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:21:45,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:21:45,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:21:45,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:21:45,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:21:45,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:21:45,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:21:45,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:21:45,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:21:45,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:21:45,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:21:45,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:21:45,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:21:45,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:21:45,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:21:45,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:21:45,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:21:45,638 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:21:45,638 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:21:45,639 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label56.c [2019-11-06 19:21:45,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052dc2ec4/89ad8e183794438aa676b667ac0e197a/FLAG7d5d7be7e [2019-11-06 19:21:46,489 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:21:46,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label56.c [2019-11-06 19:21:46,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052dc2ec4/89ad8e183794438aa676b667ac0e197a/FLAG7d5d7be7e [2019-11-06 19:21:46,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/052dc2ec4/89ad8e183794438aa676b667ac0e197a [2019-11-06 19:21:46,553 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:21:46,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:21:46,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:46,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:21:46,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:21:46,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:46" (1/1) ... [2019-11-06 19:21:46,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b8ae619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:46, skipping insertion in model container [2019-11-06 19:21:46,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:46" (1/1) ... [2019-11-06 19:21:46,575 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:21:46,712 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:21:47,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:47,910 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:21:48,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:48,501 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:21:48,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48 WrapperNode [2019-11-06 19:21:48,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:48,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:21:48,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:21:48,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:21:48,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (1/1) ... [2019-11-06 19:21:48,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:21:48,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:21:48,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:21:48,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:21:48,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (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 19:21:48,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:21:48,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:21:48,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:21:48,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:21:48,822 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:21:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:21:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:21:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:21:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:21:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:21:48,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:21:48,824 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:21:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:21:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:21:48,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:21:52,552 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:21:52,552 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:21:52,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:52 BoogieIcfgContainer [2019-11-06 19:21:52,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:21:52,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:21:52,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:21:52,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:21:52,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:21:46" (1/3) ... [2019-11-06 19:21:52,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122e66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:52, skipping insertion in model container [2019-11-06 19:21:52,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:48" (2/3) ... [2019-11-06 19:21:52,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122e66f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:52, skipping insertion in model container [2019-11-06 19:21:52,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:52" (3/3) ... [2019-11-06 19:21:52,563 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label56.c [2019-11-06 19:21:52,573 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:21:52,581 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:21:52,594 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:21:52,628 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:21:52,628 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:21:52,629 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:21:52,629 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:21:52,629 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:21:52,629 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:21:52,629 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:21:52,629 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:21:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:21:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 19:21:52,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:52,673 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] [2019-11-06 19:21:52,675 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -447969511, now seen corresponding path program 1 times [2019-11-06 19:21:52,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:52,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788561792] [2019-11-06 19:21:52,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:53,181 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 19:21:53,182 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788561792] [2019-11-06 19:21:53,183 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:53,183 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:21:53,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807064394] [2019-11-06 19:21:53,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:53,191 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:21:53,209 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:21:53,848 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-06 19:22:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:04,114 INFO L93 Difference]: Finished difference Result 3000 states and 5782 transitions. [2019-11-06 19:22:04,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:22:04,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-11-06 19:22:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:04,153 INFO L225 Difference]: With dead ends: 3000 [2019-11-06 19:22:04,153 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:22:04,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:22:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:22:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-11-06 19:22:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-11-06 19:22:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3501 transitions. [2019-11-06 19:22:04,339 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3501 transitions. Word has length 54 [2019-11-06 19:22:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:04,342 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3501 transitions. [2019-11-06 19:22:04,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:22:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3501 transitions. [2019-11-06 19:22:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 19:22:04,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:04,358 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, 1, 1, 1, 1, 1, 1, 1, 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 19:22:04,358 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -970247243, now seen corresponding path program 1 times [2019-11-06 19:22:04,359 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:04,360 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684459046] [2019-11-06 19:22:04,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:22:04,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684459046] [2019-11-06 19:22:04,673 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:22:04,673 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:22:04,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29984687] [2019-11-06 19:22:04,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:22:04,676 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:22:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:22:04,677 INFO L87 Difference]: Start difference. First operand 2138 states and 3501 transitions. Second operand 8 states. [2019-11-06 19:22:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:22:15,551 INFO L93 Difference]: Finished difference Result 8664 states and 14432 transitions. [2019-11-06 19:22:15,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:22:15,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-11-06 19:22:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:22:15,599 INFO L225 Difference]: With dead ends: 8664 [2019-11-06 19:22:15,600 INFO L226 Difference]: Without dead ends: 6532 [2019-11-06 19:22:15,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 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 19:22:15,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2019-11-06 19:22:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6511. [2019-11-06 19:22:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6511 states. [2019-11-06 19:22:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 9250 transitions. [2019-11-06 19:22:15,813 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 9250 transitions. Word has length 123 [2019-11-06 19:22:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:22:15,815 INFO L462 AbstractCegarLoop]: Abstraction has 6511 states and 9250 transitions. [2019-11-06 19:22:15,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:22:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 9250 transitions. [2019-11-06 19:22:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-11-06 19:22:15,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:22:15,824 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:15,824 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:22:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:22:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash 382381011, now seen corresponding path program 1 times [2019-11-06 19:22:15,826 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:22:15,826 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309707593] [2019-11-06 19:22:15,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:22:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:22:16,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309707593] [2019-11-06 19:22:16,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921624292] [2019-11-06 19:22:16,479 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 19:22:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:22:16,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:22:16,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:22:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:22:16,822 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:22:16,823 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:22:16,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359471881] [2019-11-06 19:22:16,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:22:16,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:22:16,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:22:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:22:16,828 INFO L87 Difference]: Start difference. First operand 6511 states and 9250 transitions. Second operand 11 states.