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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:53:01,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:53:01,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:53:01,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:53:01,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:53:01,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:53:01,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:53:01,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:53:01,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:53:01,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:53:01,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:53:01,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:53:01,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:53:01,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:53:01,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:53:01,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:53:01,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:53:01,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:53:01,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:53:01,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:53:01,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:53:01,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:53:01,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:53:01,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:53:01,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:53:01,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:53:01,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:53:01,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:53:01,216 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 21:53:01,231 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:53:01,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:53:01,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:53:01,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:53:01,233 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:53:01,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:53:01,233 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:53:01,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:53:01,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:53:01,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:53:01,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:53:01,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:53:01,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:53:01,234 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:53:01,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:53:01,235 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:53:01,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:53:01,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:53:01,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:53:01,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:53:01,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:53:01,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:53:01,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:53:01,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:53:01,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:53:01,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:53:01,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:53:01,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:53:01,238 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:53:01,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:53:01,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:53:01,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:53:01,585 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:53:01,585 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:53:01,586 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-10-13 21:53:01,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9058cd9/00f91a8172164c1c9240e21748047eb9/FLAGcb3b4030e [2019-10-13 21:53:02,352 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:53:02,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label09.c [2019-10-13 21:53:02,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9058cd9/00f91a8172164c1c9240e21748047eb9/FLAGcb3b4030e [2019-10-13 21:53:02,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9058cd9/00f91a8172164c1c9240e21748047eb9 [2019-10-13 21:53:02,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:53:02,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:53:02,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:53:02,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:53:02,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:53:02,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:53:02" (1/1) ... [2019-10-13 21:53:02,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347579a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:02, skipping insertion in model container [2019-10-13 21:53:02,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:53:02" (1/1) ... [2019-10-13 21:53:02,532 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:53:02,616 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:53:03,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:53:03,433 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:53:03,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:53:03,731 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:53:03,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03 WrapperNode [2019-10-13 21:53:03,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:53:03,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:53:03,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:53:03,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:53:03,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (1/1) ... [2019-10-13 21:53:03,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:53:03,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:53:03,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:53:03,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:53:03,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (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 21:53:03,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:53:03,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:53:03,986 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:53:03,987 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:53:03,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:53:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:53:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:53:03,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:53:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:53:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:53:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:53:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:53:03,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:53:20,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:53:20,383 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:53:20,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:53:20 BoogieIcfgContainer [2019-10-13 21:53:20,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:53:20,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:53:20,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:53:20,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:53:20,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:53:02" (1/3) ... [2019-10-13 21:53:20,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d09a4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:53:20, skipping insertion in model container [2019-10-13 21:53:20,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:03" (2/3) ... [2019-10-13 21:53:20,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d09a4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:53:20, skipping insertion in model container [2019-10-13 21:53:20,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:53:20" (3/3) ... [2019-10-13 21:53:20,401 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label09.c [2019-10-13 21:53:20,416 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:53:20,425 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:53:20,436 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:53:20,474 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:53:20,476 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:53:20,476 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:53:20,476 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:53:20,476 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:53:20,477 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:53:20,477 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:53:20,478 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:53:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:53:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:53:20,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:53:20,516 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:53:20,518 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:53:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:53:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash 863564863, now seen corresponding path program 1 times [2019-10-13 21:53:20,533 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:53:20,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973186547] [2019-10-13 21:53:20,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:20,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:20,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:53:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:20,803 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 21:53:20,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973186547] [2019-10-13 21:53:20,804 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:53:20,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:53:20,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207549674] [2019-10-13 21:53:20,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:53:20,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:53:20,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:53:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:53:20,828 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-13 21:53:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:53:22,628 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-13 21:53:22,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:53:22,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:53:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:53:22,650 INFO L225 Difference]: With dead ends: 718 [2019-10-13 21:53:22,650 INFO L226 Difference]: Without dead ends: 471 [2019-10-13 21:53:22,658 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:53:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-13 21:53:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 461. [2019-10-13 21:53:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-10-13 21:53:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 873 transitions. [2019-10-13 21:53:22,754 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 873 transitions. Word has length 11 [2019-10-13 21:53:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:53:22,754 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 873 transitions. [2019-10-13 21:53:22,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:53:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 873 transitions. [2019-10-13 21:53:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 21:53:22,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:53:22,757 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:53:22,757 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:53:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:53:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash 76450537, now seen corresponding path program 1 times [2019-10-13 21:53:22,760 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:53:22,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289451678] [2019-10-13 21:53:22,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:22,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:22,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:53:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:22,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289451678] [2019-10-13 21:53:22,891 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:53:22,891 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:53:22,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405180304] [2019-10-13 21:53:22,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:53:22,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:53:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:53:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:53:22,894 INFO L87 Difference]: Start difference. First operand 461 states and 873 transitions. Second operand 5 states. [2019-10-13 21:53:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:53:27,136 INFO L93 Difference]: Finished difference Result 1387 states and 2652 transitions. [2019-10-13 21:53:27,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:53:27,137 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-13 21:53:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:53:27,145 INFO L225 Difference]: With dead ends: 1387 [2019-10-13 21:53:27,145 INFO L226 Difference]: Without dead ends: 931 [2019-10-13 21:53:27,147 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:53:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2019-10-13 21:53:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 923. [2019-10-13 21:53:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-10-13 21:53:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1537 transitions. [2019-10-13 21:53:27,205 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1537 transitions. Word has length 23 [2019-10-13 21:53:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:53:27,205 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 1537 transitions. [2019-10-13 21:53:27,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:53:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1537 transitions. [2019-10-13 21:53:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 21:53:27,207 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:53:27,208 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:53:27,208 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:53:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:53:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2007878310, now seen corresponding path program 1 times [2019-10-13 21:53:27,209 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:53:27,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275385108] [2019-10-13 21:53:27,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:27,209 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:27,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:53:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:53:27,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275385108] [2019-10-13 21:53:27,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901360297] [2019-10-13 21:53:27,355 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 21:53:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:27,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:53:27,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:53:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:27,502 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:53:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:27,594 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:53:27,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-13 21:53:27,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252600475] [2019-10-13 21:53:27,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:53:27,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:53:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:53:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:53:27,597 INFO L87 Difference]: Start difference. First operand 923 states and 1537 transitions. Second operand 4 states. [2019-10-13 21:53:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:53:29,631 INFO L93 Difference]: Finished difference Result 3199 states and 5284 transitions. [2019-10-13 21:53:29,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:53:29,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-10-13 21:53:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:53:29,648 INFO L225 Difference]: With dead ends: 3199 [2019-10-13 21:53:29,648 INFO L226 Difference]: Without dead ends: 2281 [2019-10-13 21:53:29,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:53:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2019-10-13 21:53:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1383. [2019-10-13 21:53:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1383 states. [2019-10-13 21:53:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2349 transitions. [2019-10-13 21:53:29,723 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2349 transitions. Word has length 52 [2019-10-13 21:53:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:53:29,723 INFO L462 AbstractCegarLoop]: Abstraction has 1383 states and 2349 transitions. [2019-10-13 21:53:29,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:53:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2349 transitions. [2019-10-13 21:53:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 21:53:29,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:53:29,727 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:53:29,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:53:29,932 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:53:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:53:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2075711313, now seen corresponding path program 1 times [2019-10-13 21:53:29,933 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:53:29,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481286892] [2019-10-13 21:53:29,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:29,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:29,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:53:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:30,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481286892] [2019-10-13 21:53:30,192 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:53:30,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:53:30,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533174172] [2019-10-13 21:53:30,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:53:30,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:53:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:53:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:53:30,195 INFO L87 Difference]: Start difference. First operand 1383 states and 2349 transitions. Second operand 6 states. [2019-10-13 21:53:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:53:32,469 INFO L93 Difference]: Finished difference Result 3470 states and 5914 transitions. [2019-10-13 21:53:32,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:53:32,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2019-10-13 21:53:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:53:32,486 INFO L225 Difference]: With dead ends: 3470 [2019-10-13 21:53:32,487 INFO L226 Difference]: Without dead ends: 2092 [2019-10-13 21:53:32,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:53:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2019-10-13 21:53:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 2053. [2019-10-13 21:53:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2019-10-13 21:53:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 3141 transitions. [2019-10-13 21:53:32,602 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 3141 transitions. Word has length 67 [2019-10-13 21:53:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:53:32,606 INFO L462 AbstractCegarLoop]: Abstraction has 2053 states and 3141 transitions. [2019-10-13 21:53:32,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:53:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 3141 transitions. [2019-10-13 21:53:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 21:53:32,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:53:32,621 INFO L380 BasicCegarLoop]: trace histogram [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, 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 21:53:32,621 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:53:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:53:32,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1007646247, now seen corresponding path program 1 times [2019-10-13 21:53:32,622 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:53:32,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651928471] [2019-10-13 21:53:32,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:32,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:53:32,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:53:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:32,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651928471] [2019-10-13 21:53:32,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419237095] [2019-10-13 21:53:32,964 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 [2019-10-13 21:53:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:53:33,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:53:33,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:53:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:33,136 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:53:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:53:33,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408385254] [2019-10-13 21:53:33,248 INFO L162 IcfgInterpreter]: Started Sifa with 77 locations of interest [2019-10-13 21:53:33,249 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:53:33,255 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:53:33,263 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:53:33,264 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:53:33,424 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2019-10-13 21:53:33,538 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-13 21:53:33,856 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2019-10-13 21:53:34,236 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-13 21:53:34,281 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2019-10-13 21:53:34,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:53:34,823 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:53:34,829 INFO L168 Benchmark]: Toolchain (without parser) took 32315.90 ms. Allocated memory was 136.3 MB in the beginning and 461.9 MB in the end (delta: 325.6 MB). Free memory was 96.3 MB in the beginning and 242.0 MB in the end (delta: -145.7 MB). Peak memory consumption was 179.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:53:34,830 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:53:34,831 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1215.53 ms. Allocated memory was 136.3 MB in the beginning and 203.9 MB in the end (delta: 67.6 MB). Free memory was 96.1 MB in the beginning and 132.1 MB in the end (delta: -36.0 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:53:34,832 INFO L168 Benchmark]: Boogie Preprocessor took 191.15 ms. Allocated memory is still 203.9 MB. Free memory was 132.1 MB in the beginning and 121.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:53:34,833 INFO L168 Benchmark]: RCFGBuilder took 16464.19 ms. Allocated memory was 203.9 MB in the beginning and 316.7 MB in the end (delta: 112.7 MB). Free memory was 121.5 MB in the beginning and 165.7 MB in the end (delta: -44.2 MB). Peak memory consumption was 166.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:53:34,834 INFO L168 Benchmark]: TraceAbstraction took 14434.13 ms. Allocated memory was 316.7 MB in the beginning and 461.9 MB in the end (delta: 145.2 MB). Free memory was 165.7 MB in the beginning and 242.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:53:34,841 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1215.53 ms. Allocated memory was 136.3 MB in the beginning and 203.9 MB in the end (delta: 67.6 MB). Free memory was 96.1 MB in the beginning and 132.1 MB in the end (delta: -36.0 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 191.15 ms. Allocated memory is still 203.9 MB. Free memory was 132.1 MB in the beginning and 121.5 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 16464.19 ms. Allocated memory was 203.9 MB in the beginning and 316.7 MB in the end (delta: 112.7 MB). Free memory was 121.5 MB in the beginning and 165.7 MB in the end (delta: -44.2 MB). Peak memory consumption was 166.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14434.13 ms. Allocated memory was 316.7 MB in the beginning and 461.9 MB in the end (delta: 145.2 MB). Free memory was 165.7 MB in the beginning and 242.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...