/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:47:12,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:47:12,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:47:12,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:47:12,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:47:12,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:47:12,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:47:12,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:47:12,934 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:47:12,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:47:12,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:47:12,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:47:12,936 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:47:12,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:47:12,937 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:47:12,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:47:12,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:47:12,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:47:12,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:47:12,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:47:12,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:47:12,938 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:47:12,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:47:12,938 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:47:12,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:47:12,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:47:12,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:47:12,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:47:12,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:47:12,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:12,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:47:12,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:47:12,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:47:12,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:47:12,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:47:12,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:47:12,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:47:13,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:47:13,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:47:13,236 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:47:13,237 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:47:13,238 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:47:13,239 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label37.c [2019-11-06 22:47:13,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35a77eacc/51994d0d2f6c4978b9de8f79494842d9/FLAGec7b04d4d [2019-11-06 22:47:13,988 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:47:13,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label37.c [2019-11-06 22:47:14,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35a77eacc/51994d0d2f6c4978b9de8f79494842d9/FLAGec7b04d4d [2019-11-06 22:47:14,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35a77eacc/51994d0d2f6c4978b9de8f79494842d9 [2019-11-06 22:47:14,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:47:14,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:47:14,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:14,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:47:14,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:47:14,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:14" (1/1) ... [2019-11-06 22:47:14,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e09103a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:14, skipping insertion in model container [2019-11-06 22:47:14,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:14" (1/1) ... [2019-11-06 22:47:14,202 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:47:14,269 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:47:14,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:14,939 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:47:15,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:47:15,111 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:47:15,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15 WrapperNode [2019-11-06 22:47:15,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:47:15,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:47:15,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:47:15,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:47:15,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... [2019-11-06 22:47:15,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:47:15,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:47:15,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:47:15,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:47:15,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:47:15,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:47:15,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:47:15,367 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:47:15,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:47:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:47:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:47:15,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:47:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:47:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:47:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:47:15,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:47:17,218 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:47:17,221 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:47:17,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:17 BoogieIcfgContainer [2019-11-06 22:47:17,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:47:17,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:47:17,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:47:17,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:47:17,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:14" (1/3) ... [2019-11-06 22:47:17,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59122f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:17, skipping insertion in model container [2019-11-06 22:47:17,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:15" (2/3) ... [2019-11-06 22:47:17,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59122f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:17, skipping insertion in model container [2019-11-06 22:47:17,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:17" (3/3) ... [2019-11-06 22:47:17,243 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label37.c [2019-11-06 22:47:17,257 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:47:17,266 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:47:17,278 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:47:17,319 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:47:17,320 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:47:17,320 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:47:17,320 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:47:17,320 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:47:17,321 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:47:17,321 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:47:17,321 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:47:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:47:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:47:17,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:17,376 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:17,378 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1618793274, now seen corresponding path program 1 times [2019-11-06 22:47:17,397 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:17,397 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575407924] [2019-11-06 22:47:17,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:17,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575407924] [2019-11-06 22:47:17,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:17,759 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769036163] [2019-11-06 22:47:17,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:17,770 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:17,788 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:47:20,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:20,069 INFO L93 Difference]: Finished difference Result 994 states and 1776 transitions. [2019-11-06 22:47:20,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:20,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-06 22:47:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:20,097 INFO L225 Difference]: With dead ends: 994 [2019-11-06 22:47:20,098 INFO L226 Difference]: Without dead ends: 620 [2019-11-06 22:47:20,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-11-06 22:47:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 614. [2019-11-06 22:47:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 614 states. [2019-11-06 22:47:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 908 transitions. [2019-11-06 22:47:20,212 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 908 transitions. Word has length 55 [2019-11-06 22:47:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:20,213 INFO L462 AbstractCegarLoop]: Abstraction has 614 states and 908 transitions. [2019-11-06 22:47:20,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 908 transitions. [2019-11-06 22:47:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:47:20,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:20,222 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:47:20,222 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:20,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2133526889, now seen corresponding path program 1 times [2019-11-06 22:47:20,223 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:20,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682576228] [2019-11-06 22:47:20,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:20,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682576228] [2019-11-06 22:47:20,442 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:20,442 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:47:20,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941063315] [2019-11-06 22:47:20,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:20,450 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:20,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:20,451 INFO L87 Difference]: Start difference. First operand 614 states and 908 transitions. Second operand 4 states. [2019-11-06 22:47:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:22,355 INFO L93 Difference]: Finished difference Result 2375 states and 3595 transitions. [2019-11-06 22:47:22,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:22,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 128 [2019-11-06 22:47:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:22,368 INFO L225 Difference]: With dead ends: 2375 [2019-11-06 22:47:22,369 INFO L226 Difference]: Without dead ends: 1767 [2019-11-06 22:47:22,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:47:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2019-11-06 22:47:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1750. [2019-11-06 22:47:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2019-11-06 22:47:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2480 transitions. [2019-11-06 22:47:22,460 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2480 transitions. Word has length 128 [2019-11-06 22:47:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:22,461 INFO L462 AbstractCegarLoop]: Abstraction has 1750 states and 2480 transitions. [2019-11-06 22:47:22,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2480 transitions. [2019-11-06 22:47:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-06 22:47:22,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:22,477 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:22,477 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash 209251815, now seen corresponding path program 1 times [2019-11-06 22:47:22,478 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:22,479 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60253744] [2019-11-06 22:47:22,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 96 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:47:22,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60253744] [2019-11-06 22:47:22,877 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457587210] [2019-11-06 22:47:22,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:23,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:47:23,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 22:47:23,221 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 96 proven. 94 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:47:23,442 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:47:23,442 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:47:23,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335584499] [2019-11-06 22:47:23,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:23,447 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:47:23,448 INFO L87 Difference]: Start difference. First operand 1750 states and 2480 transitions. Second operand 5 states. [2019-11-06 22:47:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:25,256 INFO L93 Difference]: Finished difference Result 4889 states and 7244 transitions. [2019-11-06 22:47:25,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:25,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 276 [2019-11-06 22:47:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:25,277 INFO L225 Difference]: With dead ends: 4889 [2019-11-06 22:47:25,277 INFO L226 Difference]: Without dead ends: 3145 [2019-11-06 22:47:25,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 550 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:47:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2019-11-06 22:47:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 3121. [2019-11-06 22:47:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3121 states. [2019-11-06 22:47:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4269 transitions. [2019-11-06 22:47:25,389 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4269 transitions. Word has length 276 [2019-11-06 22:47:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:25,389 INFO L462 AbstractCegarLoop]: Abstraction has 3121 states and 4269 transitions. [2019-11-06 22:47:25,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4269 transitions. [2019-11-06 22:47:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-11-06 22:47:25,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:25,402 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:25,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:25,615 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:25,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:25,616 INFO L82 PathProgramCache]: Analyzing trace with hash -705099007, now seen corresponding path program 1 times [2019-11-06 22:47:25,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:25,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101629820] [2019-11-06 22:47:25,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:26,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101629820] [2019-11-06 22:47:26,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882828904] [2019-11-06 22:47:26,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:26,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:47:26,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:26,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 22:47:26,721 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:26,908 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2019-11-06 22:47:26,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:26,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:26,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:26,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:26,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:26,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:26,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:27,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:47:27,282 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:47:27,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-11-06 22:47:27,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953276783] [2019-11-06 22:47:27,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:27,284 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:27,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:27,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:47:27,285 INFO L87 Difference]: Start difference. First operand 3121 states and 4269 transitions. Second operand 5 states. [2019-11-06 22:47:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:29,015 INFO L93 Difference]: Finished difference Result 6295 states and 8674 transitions. [2019-11-06 22:47:29,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:47:29,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 294 [2019-11-06 22:47:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:29,032 INFO L225 Difference]: With dead ends: 6295 [2019-11-06 22:47:29,033 INFO L226 Difference]: Without dead ends: 3180 [2019-11-06 22:47:29,040 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 585 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-06 22:47:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2019-11-06 22:47:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2975. [2019-11-06 22:47:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2975 states. [2019-11-06 22:47:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 4113 transitions. [2019-11-06 22:47:29,127 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 4113 transitions. Word has length 294 [2019-11-06 22:47:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:29,128 INFO L462 AbstractCegarLoop]: Abstraction has 2975 states and 4113 transitions. [2019-11-06 22:47:29,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 4113 transitions. [2019-11-06 22:47:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2019-11-06 22:47:29,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:29,140 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:29,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:29,345 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 76212776, now seen corresponding path program 1 times [2019-11-06 22:47:29,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:29,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005574589] [2019-11-06 22:47:29,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 144 proven. 136 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 22:47:29,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005574589] [2019-11-06 22:47:29,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576635587] [2019-11-06 22:47:29,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:29,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:47:29,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-06 22:47:29,849 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 144 proven. 136 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-06 22:47:30,001 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:47:30,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:47:30,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033770369] [2019-11-06 22:47:30,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:47:30,002 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:47:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:47:30,003 INFO L87 Difference]: Start difference. First operand 2975 states and 4113 transitions. Second operand 5 states. [2019-11-06 22:47:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:31,781 INFO L93 Difference]: Finished difference Result 7201 states and 10319 transitions. [2019-11-06 22:47:31,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:47:31,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 341 [2019-11-06 22:47:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:31,808 INFO L225 Difference]: With dead ends: 7201 [2019-11-06 22:47:31,809 INFO L226 Difference]: Without dead ends: 4232 [2019-11-06 22:47:31,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:47:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2019-11-06 22:47:31,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3991. [2019-11-06 22:47:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3991 states. [2019-11-06 22:47:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 5527 transitions. [2019-11-06 22:47:31,944 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 5527 transitions. Word has length 341 [2019-11-06 22:47:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:31,944 INFO L462 AbstractCegarLoop]: Abstraction has 3991 states and 5527 transitions. [2019-11-06 22:47:31,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:47:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 5527 transitions. [2019-11-06 22:47:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-11-06 22:47:31,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:31,965 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:32,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:32,178 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:32,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1581254081, now seen corresponding path program 1 times [2019-11-06 22:47:32,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:32,179 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592719476] [2019-11-06 22:47:32,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 192 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:32,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592719476] [2019-11-06 22:47:32,699 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798869220] [2019-11-06 22:47:32,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:32,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 22:47:32,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:32,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:32,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:33,643 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_~a29~0_555 Int)) (let ((.cse1 (+ v_~a29~0_555 69157))) (let ((.cse0 (mod .cse1 299861))) (and (<= |c_old(~a29~0)| v_~a29~0_555) (not (= .cse0 0)) (< .cse1 0) (<= c_~a29~0 (+ .cse0 277)))))) (exists ((v_~a29~0_555 Int)) (let ((.cse2 (mod (+ v_~a29~0_555 69157) 299861))) (and (<= |c_old(~a29~0)| v_~a29~0_555) (= .cse2 0) (<= c_~a29~0 (+ .cse2 300138))))) (exists ((v_~a29~0_555 Int)) (let ((.cse3 (+ v_~a29~0_555 69157))) (and (<= |c_old(~a29~0)| v_~a29~0_555) (<= 0 .cse3) (<= c_~a29~0 (+ (mod .cse3 299861) 300138)))))) is different from true [2019-11-06 22:47:37,496 WARN L191 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2019-11-06 22:47:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 4 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-11-06 22:47:37,742 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:37,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:37,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:37,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:37,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:38,127 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [107521281] [2019-11-06 22:47:38,133 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 369 [2019-11-06 22:47:38,193 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:38,193 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)