/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/toy.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:24:20,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:24:20,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:24:20,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:24:20,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:24:20,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:24:20,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:24:20,518 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 22:24:20,536 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:24:20,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:24:20,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:24:20,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:24:20,539 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:24:20,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:24:20,540 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:24:20,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:24:20,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:24:20,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:24:20,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:24:20,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:24:20,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:24:20,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:24:20,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:24:20,543 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:24:20,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:24:20,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:24:20,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:24:20,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:24:20,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:24:20,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:24:20,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:24:20,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:24:20,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:24:20,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:24:20,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:24:20,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:24:20,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:24:20,816 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:24:20,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:24:20,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:24:20,834 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:24:20,835 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:24:20,836 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/toy.cil.c [2019-11-06 22:24:20,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1de388858/7b25306211d343aca55af84333f0dca7/FLAGae1d698ad [2019-11-06 22:24:21,403 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:24:21,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/toy.cil.c [2019-11-06 22:24:21,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1de388858/7b25306211d343aca55af84333f0dca7/FLAGae1d698ad [2019-11-06 22:24:21,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1de388858/7b25306211d343aca55af84333f0dca7 [2019-11-06 22:24:21,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:24:21,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:24:21,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:24:21,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:24:21,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:24:21,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:24:21" (1/1) ... [2019-11-06 22:24:21,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db2938f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:21, skipping insertion in model container [2019-11-06 22:24:21,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:24:21" (1/1) ... [2019-11-06 22:24:21,773 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:24:21,818 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:24:22,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:24:22,108 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:24:22,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:24:22,261 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:24:22,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22 WrapperNode [2019-11-06 22:24:22,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:24:22,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:24:22,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:24:22,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:24:22,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (1/1) ... [2019-11-06 22:24:22,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:24:22,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:24:22,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:24:22,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:24:22,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (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 22:24:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:24:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:24:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-06 22:24:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure write_loop [2019-11-06 22:24:22,380 INFO L138 BoogieDeclarations]: Found implementation of procedure compute1 [2019-11-06 22:24:22,381 INFO L138 BoogieDeclarations]: Found implementation of procedure compute2 [2019-11-06 22:24:22,381 INFO L138 BoogieDeclarations]: Found implementation of procedure write_back [2019-11-06 22:24:22,381 INFO L138 BoogieDeclarations]: Found implementation of procedure read [2019-11-06 22:24:22,381 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-06 22:24:22,381 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-06 22:24:22,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:24:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:24:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:24:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-06 22:24:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure write_loop [2019-11-06 22:24:22,382 INFO L130 BoogieDeclarations]: Found specification of procedure compute1 [2019-11-06 22:24:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure compute2 [2019-11-06 22:24:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure write_back [2019-11-06 22:24:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:24:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-06 22:24:22,383 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-06 22:24:22,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:24:22,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:24:22,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:24:23,071 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:24:23,071 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 22:24:23,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:24:23 BoogieIcfgContainer [2019-11-06 22:24:23,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:24:23,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:24:23,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:24:23,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:24:23,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:24:21" (1/3) ... [2019-11-06 22:24:23,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2178f4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:24:23, skipping insertion in model container [2019-11-06 22:24:23,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:24:22" (2/3) ... [2019-11-06 22:24:23,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2178f4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:24:23, skipping insertion in model container [2019-11-06 22:24:23,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:24:23" (3/3) ... [2019-11-06 22:24:23,086 INFO L109 eAbstractionObserver]: Analyzing ICFG toy.cil.c [2019-11-06 22:24:23,096 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:24:23,110 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:24:23,118 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:24:23,147 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:24:23,147 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:24:23,147 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:24:23,147 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:24:23,148 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:24:23,148 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:24:23,148 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:24:23,148 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:24:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states. [2019-11-06 22:24:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:23,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:23,178 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] [2019-11-06 22:24:23,179 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2004131150, now seen corresponding path program 1 times [2019-11-06 22:24:23,191 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:23,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460699210] [2019-11-06 22:24:23,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:23,597 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 22:24:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:23,635 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 22:24:23,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460699210] [2019-11-06 22:24:23,637 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:23,637 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:23,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910174235] [2019-11-06 22:24:23,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:23,645 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:23,662 INFO L87 Difference]: Start difference. First operand 159 states. Second operand 4 states. [2019-11-06 22:24:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:24,465 INFO L93 Difference]: Finished difference Result 326 states and 563 transitions. [2019-11-06 22:24:24,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:24,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:24:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:24,481 INFO L225 Difference]: With dead ends: 326 [2019-11-06 22:24:24,481 INFO L226 Difference]: Without dead ends: 176 [2019-11-06 22:24:24,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-06 22:24:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 150. [2019-11-06 22:24:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-06 22:24:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 243 transitions. [2019-11-06 22:24:24,555 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 243 transitions. Word has length 47 [2019-11-06 22:24:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:24,556 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 243 transitions. [2019-11-06 22:24:24,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 243 transitions. [2019-11-06 22:24:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:24,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:24,559 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] [2019-11-06 22:24:24,560 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash 46852848, now seen corresponding path program 1 times [2019-11-06 22:24:24,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:24,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599529647] [2019-11-06 22:24:24,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:24,855 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 22:24:24,855 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599529647] [2019-11-06 22:24:24,856 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:24,856 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:24,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241075224] [2019-11-06 22:24:24,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:24,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:24,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:24,859 INFO L87 Difference]: Start difference. First operand 150 states and 243 transitions. Second operand 5 states. [2019-11-06 22:24:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:26,239 INFO L93 Difference]: Finished difference Result 451 states and 743 transitions. [2019-11-06 22:24:26,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:24:26,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-11-06 22:24:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:26,244 INFO L225 Difference]: With dead ends: 451 [2019-11-06 22:24:26,244 INFO L226 Difference]: Without dead ends: 319 [2019-11-06 22:24:26,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-06 22:24:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 283. [2019-11-06 22:24:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2019-11-06 22:24:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 471 transitions. [2019-11-06 22:24:26,311 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 471 transitions. Word has length 47 [2019-11-06 22:24:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:26,311 INFO L462 AbstractCegarLoop]: Abstraction has 283 states and 471 transitions. [2019-11-06 22:24:26,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 471 transitions. [2019-11-06 22:24:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:26,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:26,316 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] [2019-11-06 22:24:26,316 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash -227906766, now seen corresponding path program 1 times [2019-11-06 22:24:26,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:26,317 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547415602] [2019-11-06 22:24:26,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:26,552 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 22:24:26,552 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547415602] [2019-11-06 22:24:26,552 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:26,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:26,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304421054] [2019-11-06 22:24:26,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:26,556 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:26,557 INFO L87 Difference]: Start difference. First operand 283 states and 471 transitions. Second operand 5 states. [2019-11-06 22:24:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:27,721 INFO L93 Difference]: Finished difference Result 863 states and 1445 transitions. [2019-11-06 22:24:27,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:24:27,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-11-06 22:24:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:27,727 INFO L225 Difference]: With dead ends: 863 [2019-11-06 22:24:27,728 INFO L226 Difference]: Without dead ends: 600 [2019-11-06 22:24:27,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:24:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-06 22:24:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 539. [2019-11-06 22:24:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2019-11-06 22:24:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 901 transitions. [2019-11-06 22:24:27,788 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 901 transitions. Word has length 47 [2019-11-06 22:24:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:27,788 INFO L462 AbstractCegarLoop]: Abstraction has 539 states and 901 transitions. [2019-11-06 22:24:27,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 901 transitions. [2019-11-06 22:24:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:27,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:27,792 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] [2019-11-06 22:24:27,793 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2901456, now seen corresponding path program 1 times [2019-11-06 22:24:27,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:27,794 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192985941] [2019-11-06 22:24:27,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:27,932 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 22:24:27,933 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192985941] [2019-11-06 22:24:27,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:27,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:27,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208786945] [2019-11-06 22:24:27,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:27,935 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:27,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:27,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:27,935 INFO L87 Difference]: Start difference. First operand 539 states and 901 transitions. Second operand 5 states. [2019-11-06 22:24:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:29,228 INFO L93 Difference]: Finished difference Result 1573 states and 2625 transitions. [2019-11-06 22:24:29,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:24:29,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-11-06 22:24:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:29,239 INFO L225 Difference]: With dead ends: 1573 [2019-11-06 22:24:29,239 INFO L226 Difference]: Without dead ends: 1064 [2019-11-06 22:24:29,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:24:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2019-11-06 22:24:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 979. [2019-11-06 22:24:29,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 979 states. [2019-11-06 22:24:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1637 transitions. [2019-11-06 22:24:29,337 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1637 transitions. Word has length 47 [2019-11-06 22:24:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:29,337 INFO L462 AbstractCegarLoop]: Abstraction has 979 states and 1637 transitions. [2019-11-06 22:24:29,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1637 transitions. [2019-11-06 22:24:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:29,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:29,341 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] [2019-11-06 22:24:29,341 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash 698698418, now seen corresponding path program 1 times [2019-11-06 22:24:29,342 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:29,342 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016202936] [2019-11-06 22:24:29,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:29,473 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 22:24:29,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016202936] [2019-11-06 22:24:29,474 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:29,474 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:29,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550025599] [2019-11-06 22:24:29,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:29,475 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:29,476 INFO L87 Difference]: Start difference. First operand 979 states and 1637 transitions. Second operand 4 states. [2019-11-06 22:24:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:30,356 INFO L93 Difference]: Finished difference Result 2560 states and 4211 transitions. [2019-11-06 22:24:30,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:30,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:24:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:30,369 INFO L225 Difference]: With dead ends: 2560 [2019-11-06 22:24:30,369 INFO L226 Difference]: Without dead ends: 1619 [2019-11-06 22:24:30,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:30,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2019-11-06 22:24:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1507. [2019-11-06 22:24:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2019-11-06 22:24:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 2476 transitions. [2019-11-06 22:24:30,500 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 2476 transitions. Word has length 47 [2019-11-06 22:24:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:30,501 INFO L462 AbstractCegarLoop]: Abstraction has 1507 states and 2476 transitions. [2019-11-06 22:24:30,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 2476 transitions. [2019-11-06 22:24:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:30,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:30,505 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] [2019-11-06 22:24:30,505 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:30,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2084901812, now seen corresponding path program 1 times [2019-11-06 22:24:30,506 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:30,506 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751431060] [2019-11-06 22:24:30,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:30,685 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 22:24:30,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751431060] [2019-11-06 22:24:30,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:30,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:30,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531858273] [2019-11-06 22:24:30,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:30,687 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:30,687 INFO L87 Difference]: Start difference. First operand 1507 states and 2476 transitions. Second operand 4 states. [2019-11-06 22:24:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:31,651 INFO L93 Difference]: Finished difference Result 4237 states and 7082 transitions. [2019-11-06 22:24:31,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:31,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:24:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:31,669 INFO L225 Difference]: With dead ends: 4237 [2019-11-06 22:24:31,670 INFO L226 Difference]: Without dead ends: 2772 [2019-11-06 22:24:31,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2019-11-06 22:24:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2569. [2019-11-06 22:24:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2569 states. [2019-11-06 22:24:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 4274 transitions. [2019-11-06 22:24:31,918 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 4274 transitions. Word has length 47 [2019-11-06 22:24:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:31,919 INFO L462 AbstractCegarLoop]: Abstraction has 2569 states and 4274 transitions. [2019-11-06 22:24:31,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 4274 transitions. [2019-11-06 22:24:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:31,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:31,923 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] [2019-11-06 22:24:31,923 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -785421443, now seen corresponding path program 1 times [2019-11-06 22:24:31,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:31,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121883146] [2019-11-06 22:24:31,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:32,093 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 22:24:32,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121883146] [2019-11-06 22:24:32,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:32,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:32,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416324099] [2019-11-06 22:24:32,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:32,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:32,096 INFO L87 Difference]: Start difference. First operand 2569 states and 4274 transitions. Second operand 4 states. [2019-11-06 22:24:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:32,797 INFO L93 Difference]: Finished difference Result 5407 states and 8974 transitions. [2019-11-06 22:24:32,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:32,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:24:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:32,815 INFO L225 Difference]: With dead ends: 5407 [2019-11-06 22:24:32,815 INFO L226 Difference]: Without dead ends: 2916 [2019-11-06 22:24:32,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2019-11-06 22:24:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2731. [2019-11-06 22:24:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2731 states. [2019-11-06 22:24:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4538 transitions. [2019-11-06 22:24:33,089 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4538 transitions. Word has length 47 [2019-11-06 22:24:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:33,090 INFO L462 AbstractCegarLoop]: Abstraction has 2731 states and 4538 transitions. [2019-11-06 22:24:33,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4538 transitions. [2019-11-06 22:24:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:33,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:33,093 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] [2019-11-06 22:24:33,094 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:33,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:33,094 INFO L82 PathProgramCache]: Analyzing trace with hash 15163777, now seen corresponding path program 1 times [2019-11-06 22:24:33,094 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:33,095 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049808290] [2019-11-06 22:24:33,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:33,218 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 22:24:33,218 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049808290] [2019-11-06 22:24:33,218 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:33,218 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:33,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198400998] [2019-11-06 22:24:33,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:33,219 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:33,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:33,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:33,220 INFO L87 Difference]: Start difference. First operand 2731 states and 4538 transitions. Second operand 5 states. [2019-11-06 22:24:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:34,375 INFO L93 Difference]: Finished difference Result 5992 states and 9886 transitions. [2019-11-06 22:24:34,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:24:34,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-11-06 22:24:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:34,398 INFO L225 Difference]: With dead ends: 5992 [2019-11-06 22:24:34,399 INFO L226 Difference]: Without dead ends: 3319 [2019-11-06 22:24:34,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2019-11-06 22:24:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3061. [2019-11-06 22:24:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3061 states. [2019-11-06 22:24:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 5029 transitions. [2019-11-06 22:24:34,638 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 5029 transitions. Word has length 47 [2019-11-06 22:24:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:34,641 INFO L462 AbstractCegarLoop]: Abstraction has 3061 states and 5029 transitions. [2019-11-06 22:24:34,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 5029 transitions. [2019-11-06 22:24:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:34,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:34,644 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] [2019-11-06 22:24:34,644 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 234018495, now seen corresponding path program 1 times [2019-11-06 22:24:34,645 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:34,645 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515376239] [2019-11-06 22:24:34,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:34,772 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 22:24:34,773 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515376239] [2019-11-06 22:24:34,773 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:34,774 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:24:34,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383837207] [2019-11-06 22:24:34,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:24:34,774 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:24:34,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:34,775 INFO L87 Difference]: Start difference. First operand 3061 states and 5029 transitions. Second operand 5 states. [2019-11-06 22:24:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:36,031 INFO L93 Difference]: Finished difference Result 7267 states and 11876 transitions. [2019-11-06 22:24:36,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:24:36,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-11-06 22:24:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:36,058 INFO L225 Difference]: With dead ends: 7267 [2019-11-06 22:24:36,058 INFO L226 Difference]: Without dead ends: 4312 [2019-11-06 22:24:36,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2019-11-06 22:24:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4030. [2019-11-06 22:24:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4030 states. [2019-11-06 22:24:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 6586 transitions. [2019-11-06 22:24:36,432 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 6586 transitions. Word has length 47 [2019-11-06 22:24:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:36,433 INFO L462 AbstractCegarLoop]: Abstraction has 4030 states and 6586 transitions. [2019-11-06 22:24:36,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:24:36,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 6586 transitions. [2019-11-06 22:24:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:36,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:36,436 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] [2019-11-06 22:24:36,440 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash -583629955, now seen corresponding path program 1 times [2019-11-06 22:24:36,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:36,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39565478] [2019-11-06 22:24:36,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:36,568 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 22:24:36,569 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39565478] [2019-11-06 22:24:36,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:36,569 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:36,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462907019] [2019-11-06 22:24:36,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:36,570 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:36,571 INFO L87 Difference]: Start difference. First operand 4030 states and 6586 transitions. Second operand 4 states. [2019-11-06 22:24:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:37,314 INFO L93 Difference]: Finished difference Result 8742 states and 14409 transitions. [2019-11-06 22:24:37,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:37,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:24:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:37,340 INFO L225 Difference]: With dead ends: 8742 [2019-11-06 22:24:37,340 INFO L226 Difference]: Without dead ends: 4866 [2019-11-06 22:24:37,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2019-11-06 22:24:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4623. [2019-11-06 22:24:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4623 states. [2019-11-06 22:24:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 7484 transitions. [2019-11-06 22:24:37,712 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 7484 transitions. Word has length 47 [2019-11-06 22:24:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:37,712 INFO L462 AbstractCegarLoop]: Abstraction has 4623 states and 7484 transitions. [2019-11-06 22:24:37,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 7484 transitions. [2019-11-06 22:24:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 22:24:37,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:37,714 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] [2019-11-06 22:24:37,715 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1717192635, now seen corresponding path program 1 times [2019-11-06 22:24:37,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:37,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698302247] [2019-11-06 22:24:37,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:37,821 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 22:24:37,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698302247] [2019-11-06 22:24:37,822 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:37,822 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:24:37,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920803681] [2019-11-06 22:24:37,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:37,823 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:37,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:37,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:24:37,824 INFO L87 Difference]: Start difference. First operand 4623 states and 7484 transitions. Second operand 4 states. [2019-11-06 22:24:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:38,872 INFO L93 Difference]: Finished difference Result 10187 states and 16730 transitions. [2019-11-06 22:24:38,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:38,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-11-06 22:24:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:38,899 INFO L225 Difference]: With dead ends: 10187 [2019-11-06 22:24:38,899 INFO L226 Difference]: Without dead ends: 5616 [2019-11-06 22:24:38,917 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:24:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2019-11-06 22:24:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 5255. [2019-11-06 22:24:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5255 states. [2019-11-06 22:24:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 8438 transitions. [2019-11-06 22:24:39,244 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 8438 transitions. Word has length 47 [2019-11-06 22:24:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:39,245 INFO L462 AbstractCegarLoop]: Abstraction has 5255 states and 8438 transitions. [2019-11-06 22:24:39,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 8438 transitions. [2019-11-06 22:24:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 22:24:39,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:39,260 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:24:39,260 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash -683599016, now seen corresponding path program 1 times [2019-11-06 22:24:39,261 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:39,261 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724567737] [2019-11-06 22:24:39,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:24:39,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724567737] [2019-11-06 22:24:39,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437602857] [2019-11-06 22:24:39,439 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 22:24:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:39,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 22:24:39,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:24:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:24:39,610 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:24:39,610 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 22:24:39,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816084437] [2019-11-06 22:24:39,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:24:39,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:39,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:24:39,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:24:39,612 INFO L87 Difference]: Start difference. First operand 5255 states and 8438 transitions. Second operand 3 states. [2019-11-06 22:24:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:40,212 INFO L93 Difference]: Finished difference Result 12608 states and 20647 transitions. [2019-11-06 22:24:40,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:24:40,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2019-11-06 22:24:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:40,232 INFO L225 Difference]: With dead ends: 12608 [2019-11-06 22:24:40,232 INFO L226 Difference]: Without dead ends: 4407 [2019-11-06 22:24:40,283 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:24:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2019-11-06 22:24:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 4407. [2019-11-06 22:24:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4407 states. [2019-11-06 22:24:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 6888 transitions. [2019-11-06 22:24:40,613 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 6888 transitions. Word has length 81 [2019-11-06 22:24:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:40,613 INFO L462 AbstractCegarLoop]: Abstraction has 4407 states and 6888 transitions. [2019-11-06 22:24:40,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:24:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 6888 transitions. [2019-11-06 22:24:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:24:40,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:40,633 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2019-11-06 22:24:40,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:40,839 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash -446075030, now seen corresponding path program 1 times [2019-11-06 22:24:40,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:40,840 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101942176] [2019-11-06 22:24:40,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:24:41,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101942176] [2019-11-06 22:24:41,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:41,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 22:24:41,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913400376] [2019-11-06 22:24:41,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:24:41,122 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:41,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:24:41,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:24:41,123 INFO L87 Difference]: Start difference. First operand 4407 states and 6888 transitions. Second operand 9 states. [2019-11-06 22:24:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:43,459 INFO L93 Difference]: Finished difference Result 8651 states and 14095 transitions. [2019-11-06 22:24:43,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:24:43,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-11-06 22:24:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:43,485 INFO L225 Difference]: With dead ends: 8651 [2019-11-06 22:24:43,485 INFO L226 Difference]: Without dead ends: 6277 [2019-11-06 22:24:43,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2019-11-06 22:24:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2019-11-06 22:24:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 5062. [2019-11-06 22:24:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5062 states. [2019-11-06 22:24:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 8227 transitions. [2019-11-06 22:24:44,687 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 8227 transitions. Word has length 122 [2019-11-06 22:24:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:44,689 INFO L462 AbstractCegarLoop]: Abstraction has 5062 states and 8227 transitions. [2019-11-06 22:24:44,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:24:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 8227 transitions. [2019-11-06 22:24:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:24:44,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:44,715 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2019-11-06 22:24:44,715 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1780703076, now seen corresponding path program 1 times [2019-11-06 22:24:44,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:44,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156471939] [2019-11-06 22:24:44,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:24:45,017 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156471939] [2019-11-06 22:24:45,017 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087717500] [2019-11-06 22:24:45,017 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 22:24:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:45,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:24:45,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:24:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:24:45,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:24:45,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-11-06 22:24:45,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819647057] [2019-11-06 22:24:45,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:24:45,277 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:45,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:24:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:24:45,278 INFO L87 Difference]: Start difference. First operand 5062 states and 8227 transitions. Second operand 4 states. [2019-11-06 22:24:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:45,891 INFO L93 Difference]: Finished difference Result 9819 states and 16121 transitions. [2019-11-06 22:24:45,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:24:45,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2019-11-06 22:24:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:45,918 INFO L225 Difference]: With dead ends: 9819 [2019-11-06 22:24:45,919 INFO L226 Difference]: Without dead ends: 4802 [2019-11-06 22:24:45,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:24:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4802 states. [2019-11-06 22:24:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4802 to 4550. [2019-11-06 22:24:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4550 states. [2019-11-06 22:24:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4550 states to 4550 states and 7365 transitions. [2019-11-06 22:24:46,408 INFO L78 Accepts]: Start accepts. Automaton has 4550 states and 7365 transitions. Word has length 122 [2019-11-06 22:24:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:46,467 INFO L462 AbstractCegarLoop]: Abstraction has 4550 states and 7365 transitions. [2019-11-06 22:24:46,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:24:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4550 states and 7365 transitions. [2019-11-06 22:24:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 22:24:46,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:46,485 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2019-11-06 22:24:46,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:46,699 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -247883034, now seen corresponding path program 1 times [2019-11-06 22:24:46,700 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:46,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987678751] [2019-11-06 22:24:46,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 22:24:46,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987678751] [2019-11-06 22:24:46,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107729761] [2019-11-06 22:24:46,947 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 22:24:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:47,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:24:47,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:24:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 22:24:47,180 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:24:47,181 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 22:24:47,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575635192] [2019-11-06 22:24:47,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 22:24:47,182 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:47,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 22:24:47,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:24:47,182 INFO L87 Difference]: Start difference. First operand 4550 states and 7365 transitions. Second operand 9 states. [2019-11-06 22:24:47,389 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-06 22:24:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:49,347 INFO L93 Difference]: Finished difference Result 11507 states and 19125 transitions. [2019-11-06 22:24:49,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 22:24:49,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-11-06 22:24:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:49,378 INFO L225 Difference]: With dead ends: 11507 [2019-11-06 22:24:49,378 INFO L226 Difference]: Without dead ends: 7005 [2019-11-06 22:24:49,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:24:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2019-11-06 22:24:49,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 5301. [2019-11-06 22:24:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5301 states. [2019-11-06 22:24:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5301 states to 5301 states and 8046 transitions. [2019-11-06 22:24:49,947 INFO L78 Accepts]: Start accepts. Automaton has 5301 states and 8046 transitions. Word has length 122 [2019-11-06 22:24:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:24:49,948 INFO L462 AbstractCegarLoop]: Abstraction has 5301 states and 8046 transitions. [2019-11-06 22:24:49,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 22:24:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5301 states and 8046 transitions. [2019-11-06 22:24:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:24:49,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:24:49,969 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2019-11-06 22:24:50,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:24:50,174 INFO L410 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:24:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:24:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1614311007, now seen corresponding path program 1 times [2019-11-06 22:24:50,175 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:24:50,176 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643341470] [2019-11-06 22:24:50,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:24:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:24:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 22:24:50,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643341470] [2019-11-06 22:24:50,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:24:50,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 22:24:50,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656834406] [2019-11-06 22:24:50,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:24:50,438 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:24:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:24:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:24:50,439 INFO L87 Difference]: Start difference. First operand 5301 states and 8046 transitions. Second operand 8 states. [2019-11-06 22:24:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:24:52,654 INFO L93 Difference]: Finished difference Result 16447 states and 25775 transitions. [2019-11-06 22:24:52,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:24:52,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2019-11-06 22:24:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:24:52,698 INFO L225 Difference]: With dead ends: 16447 [2019-11-06 22:24:52,698 INFO L226 Difference]: Without dead ends: 11155 [2019-11-06 22:24:52,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:24:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2019-11-06 22:24:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 9112. [2019-11-06 22:24:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9112 states.