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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:41,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:41,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:41,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:41,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:41,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:41,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:41,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:41,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:41,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:41,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:41,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:41,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:41,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:41,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:41,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:41,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:41,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:41,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:41,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:41,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:41,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:41,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:41,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:41,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:06:41,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:06:41,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:06:41,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:06:41,610 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:06:41,611 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:06:41,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:41,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:41,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:41,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:41,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:41,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:41,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:41,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:41,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:41,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:41,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:41,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:06:41,633 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:41,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:41,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:41,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:41,636 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:41,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:41,636 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:41,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:41,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:41,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:41,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:41,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:41,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:41,638 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:41,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:41,638 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:41,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:41,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:41,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:41,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:41,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:41,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:41,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:41,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:41,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:41,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:41,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:41,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:41,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:41,922 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:41,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:41,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:41,948 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:41,948 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:41,949 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-10-13 18:06:42,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7526600/d0f4b90bcf1740448c75d5e66fbd1397/FLAG1e4d974eb [2019-10-13 18:06:42,819 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:42,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-10-13 18:06:42,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7526600/d0f4b90bcf1740448c75d5e66fbd1397/FLAG1e4d974eb [2019-10-13 18:06:42,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7526600/d0f4b90bcf1740448c75d5e66fbd1397 [2019-10-13 18:06:42,914 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:42,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:42,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:42,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:42,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:42,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0143d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42, skipping insertion in model container [2019-10-13 18:06:42,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,936 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:43,063 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:44,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:44,546 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:45,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:45,061 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:45,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45 WrapperNode [2019-10-13 18:06:45,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:45,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:45,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:45,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:45,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... [2019-10-13 18:06:45,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:45,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:45,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:45,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:45,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:45,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:45,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:45,392 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:45,392 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:45,392 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:06:45,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:06:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:45,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:45,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:49,102 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:49,103 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:49,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:49 BoogieIcfgContainer [2019-10-13 18:06:49,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:49,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:49,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:49,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:49,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:42" (1/3) ... [2019-10-13 18:06:49,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac231c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:49, skipping insertion in model container [2019-10-13 18:06:49,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:45" (2/3) ... [2019-10-13 18:06:49,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac231c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:49, skipping insertion in model container [2019-10-13 18:06:49,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:49" (3/3) ... [2019-10-13 18:06:49,133 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label22.c [2019-10-13 18:06:49,153 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:49,167 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:49,181 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:49,239 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:49,239 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:49,239 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:49,239 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:49,239 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:49,240 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:49,240 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:49,240 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:06:49,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 18:06:49,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:49,305 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:49,308 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:49,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:49,314 INFO L82 PathProgramCache]: Analyzing trace with hash -864903206, now seen corresponding path program 1 times [2019-10-13 18:06:49,324 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:49,324 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254372367] [2019-10-13 18:06:49,324 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:49,325 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:49,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:49,843 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-10-13 18:06:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:49,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254372367] [2019-10-13 18:06:49,889 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:49,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:49,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370990794] [2019-10-13 18:06:49,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:49,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:49,913 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:06:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:59,213 INFO L93 Difference]: Finished difference Result 2984 states and 5769 transitions. [2019-10-13 18:06:59,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:59,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-10-13 18:06:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:59,247 INFO L225 Difference]: With dead ends: 2984 [2019-10-13 18:06:59,247 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:06:59,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:06:59,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2135. [2019-10-13 18:06:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2019-10-13 18:06:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3571 transitions. [2019-10-13 18:06:59,430 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3571 transitions. Word has length 47 [2019-10-13 18:06:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:59,433 INFO L462 AbstractCegarLoop]: Abstraction has 2135 states and 3571 transitions. [2019-10-13 18:06:59,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3571 transitions. [2019-10-13 18:06:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 18:06:59,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:59,451 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:59,451 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1267579837, now seen corresponding path program 1 times [2019-10-13 18:06:59,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:59,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090848549] [2019-10-13 18:06:59,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:59,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:59,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:59,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090848549] [2019-10-13 18:06:59,735 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:59,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:06:59,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371417258] [2019-10-13 18:06:59,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:06:59,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:06:59,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:06:59,739 INFO L87 Difference]: Start difference. First operand 2135 states and 3571 transitions. Second operand 8 states. [2019-10-13 18:07:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:06,880 INFO L93 Difference]: Finished difference Result 5045 states and 8285 transitions. [2019-10-13 18:07:06,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:07:06,881 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-10-13 18:07:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:06,897 INFO L225 Difference]: With dead ends: 5045 [2019-10-13 18:07:06,898 INFO L226 Difference]: Without dead ends: 2916 [2019-10-13 18:07:06,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:07:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2019-10-13 18:07:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2879. [2019-10-13 18:07:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2879 states. [2019-10-13 18:07:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 4328 transitions. [2019-10-13 18:07:07,005 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 4328 transitions. Word has length 118 [2019-10-13 18:07:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:07,007 INFO L462 AbstractCegarLoop]: Abstraction has 2879 states and 4328 transitions. [2019-10-13 18:07:07,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:07:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 4328 transitions. [2019-10-13 18:07:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-13 18:07:07,015 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:07,016 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:07:07,016 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:07,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:07,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1167664030, now seen corresponding path program 1 times [2019-10-13 18:07:07,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:07,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351879187] [2019-10-13 18:07:07,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:07,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:07,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:07,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351879187] [2019-10-13 18:07:07,490 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:07,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:07:07,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472268862] [2019-10-13 18:07:07,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:07:07,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:07:07,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:07:07,505 INFO L87 Difference]: Start difference. First operand 2879 states and 4328 transitions. Second operand 9 states. [2019-10-13 18:07:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:17,705 INFO L93 Difference]: Finished difference Result 10953 states and 16883 transitions. [2019-10-13 18:07:17,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:07:17,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 197 [2019-10-13 18:07:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:17,749 INFO L225 Difference]: With dead ends: 10953 [2019-10-13 18:07:17,750 INFO L226 Difference]: Without dead ends: 8080 [2019-10-13 18:07:17,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:07:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2019-10-13 18:07:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7316. [2019-10-13 18:07:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7316 states. [2019-10-13 18:07:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7316 states to 7316 states and 9898 transitions. [2019-10-13 18:07:18,006 INFO L78 Accepts]: Start accepts. Automaton has 7316 states and 9898 transitions. Word has length 197 [2019-10-13 18:07:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:18,006 INFO L462 AbstractCegarLoop]: Abstraction has 7316 states and 9898 transitions. [2019-10-13 18:07:18,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:07:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 7316 states and 9898 transitions. [2019-10-13 18:07:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-13 18:07:18,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:18,011 INFO L380 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, 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] [2019-10-13 18:07:18,011 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1485271607, now seen corresponding path program 1 times [2019-10-13 18:07:18,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:18,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141294970] [2019-10-13 18:07:18,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:18,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:18,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:07:18,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141294970] [2019-10-13 18:07:18,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643542231] [2019-10-13 18:07:18,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:07:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:18,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:07:18,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:07:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 18:07:18,500 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:07:18,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2019-10-13 18:07:18,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885695058] [2019-10-13 18:07:18,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:07:18,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:18,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:07:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:07:18,503 INFO L87 Difference]: Start difference. First operand 7316 states and 9898 transitions. Second operand 5 states.