/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:17:00,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:17:00,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:17:00,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:17:00,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:17:00,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:17:00,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:17:00,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:17:00,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:17:00,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:17:00,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:17:00,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:17:00,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:17:00,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:17:00,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:17:00,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:17:00,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:17:00,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:17:00,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:17:00,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:17:00,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:17:00,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:17:00,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:17:00,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:17:00,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:17:00,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:17:00,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:17:00,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:17:00,844 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 [2019-11-23 20:17:00,868 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:17:00,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:17:00,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:17:00,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:17:00,871 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:17:00,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:17:00,872 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:17:00,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:17:00,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:17:00,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:17:00,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:17:00,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:17:00,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:17:00,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:17:00,875 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:17:00,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:17:00,875 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:17:00,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:17:00,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:17:00,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:17:00,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:17:00,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:17:00,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:17:00,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:17:00,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:17:00,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:17:00,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:17:00,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:17:00,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:17:00,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:17:01,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:17:01,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:17:01,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:17:01,154 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:17:01,154 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:17:01,155 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2019-11-23 20:17:01,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567640f4e/4620b2c802284550ae295ccd155c6b38/FLAG8ae52980d [2019-11-23 20:17:01,706 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:17:01,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2019-11-23 20:17:01,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567640f4e/4620b2c802284550ae295ccd155c6b38/FLAG8ae52980d [2019-11-23 20:17:02,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/567640f4e/4620b2c802284550ae295ccd155c6b38 [2019-11-23 20:17:02,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:17:02,061 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:17:02,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:17:02,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:17:02,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:17:02,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21bcc01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02, skipping insertion in model container [2019-11-23 20:17:02,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:17:02,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:17:02,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:17:02,322 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:17:02,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:17:02,450 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:17:02,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02 WrapperNode [2019-11-23 20:17:02,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:17:02,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:17:02,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:17:02,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:17:02,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:17:02,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:17:02,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:17:02,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:17:02,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (1/1) ... [2019-11-23 20:17:02,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:17:02,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:17:02,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:17:02,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:17:02,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (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 [2019-11-23 20:17:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:17:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:17:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:17:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:17:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:17:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:17:02,952 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:17:02,953 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:17:02,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:17:02 BoogieIcfgContainer [2019-11-23 20:17:02,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:17:02,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:17:02,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:17:02,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:17:02,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:17:02" (1/3) ... [2019-11-23 20:17:02,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7258a86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:17:02, skipping insertion in model container [2019-11-23 20:17:02,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:17:02" (2/3) ... [2019-11-23 20:17:02,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7258a86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:17:02, skipping insertion in model container [2019-11-23 20:17:02,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:17:02" (3/3) ... [2019-11-23 20:17:02,964 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2019-11-23 20:17:02,972 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:17:02,977 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:17:02,987 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:17:03,009 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:17:03,010 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:17:03,010 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:17:03,010 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:17:03,010 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:17:03,010 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:17:03,011 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:17:03,011 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:17:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-23 20:17:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:17:03,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,032 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] [2019-11-23 20:17:03,032 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2019-11-23 20:17:03,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001286706] [2019-11-23 20:17:03,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:03,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001286706] [2019-11-23 20:17:03,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:03,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:17:03,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778902700] [2019-11-23 20:17:03,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:17:03,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:17:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:17:03,187 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-11-23 20:17:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:03,211 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2019-11-23 20:17:03,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:17:03,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-11-23 20:17:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:03,224 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:17:03,224 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:17:03,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:17:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:17:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 20:17:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:17:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-23 20:17:03,275 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2019-11-23 20:17:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:03,276 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-23 20:17:03,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:17:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-23 20:17:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:17:03,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,279 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] [2019-11-23 20:17:03,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2019-11-23 20:17:03,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760679177] [2019-11-23 20:17:03,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:03,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760679177] [2019-11-23 20:17:03,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:03,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:17:03,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102200351] [2019-11-23 20:17:03,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:17:03,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:17:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:17:03,442 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2019-11-23 20:17:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:03,545 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-11-23 20:17:03,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:17:03,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:17:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:03,547 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:17:03,549 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:17:03,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:17:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:17:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:17:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:17:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-11-23 20:17:03,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23 [2019-11-23 20:17:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:03,570 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-11-23 20:17:03,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:17:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-11-23 20:17:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:17:03,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,575 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] [2019-11-23 20:17:03,575 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash -807143506, now seen corresponding path program 1 times [2019-11-23 20:17:03,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754963728] [2019-11-23 20:17:03,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:17:03,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754963728] [2019-11-23 20:17:03,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:03,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:17:03,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519464759] [2019-11-23 20:17:03,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:17:03,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:17:03,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:17:03,682 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 3 states. [2019-11-23 20:17:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:03,742 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2019-11-23 20:17:03,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:17:03,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:17:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:03,744 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:17:03,744 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:17:03,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:17:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:17:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-11-23 20:17:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:17:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2019-11-23 20:17:03,754 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 25 [2019-11-23 20:17:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:03,754 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2019-11-23 20:17:03,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:17:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2019-11-23 20:17:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:17:03,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,755 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] [2019-11-23 20:17:03,756 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,756 INFO L82 PathProgramCache]: Analyzing trace with hash 293663568, now seen corresponding path program 1 times [2019-11-23 20:17:03,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803119028] [2019-11-23 20:17:03,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:17:03,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803119028] [2019-11-23 20:17:03,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:17:03,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:17:03,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655855411] [2019-11-23 20:17:03,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:17:03,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:17:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:17:03,829 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 4 states. [2019-11-23 20:17:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:03,981 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2019-11-23 20:17:03,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:17:03,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-23 20:17:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:03,983 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:17:03,983 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:17:03,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:17:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:17:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2019-11-23 20:17:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:17:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:17:03,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 27 [2019-11-23 20:17:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:03,992 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:17:03,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:17:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:17:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:17:03,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:03,994 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] [2019-11-23 20:17:03,994 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2019-11-23 20:17:03,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:03,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659894386] [2019-11-23 20:17:03,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:17:04,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659894386] [2019-11-23 20:17:04,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991631311] [2019-11-23 20:17:04,071 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 [2019-11-23 20:17:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:17:04,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:17:04,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:04,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:17:04,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636550630] [2019-11-23 20:17:04,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:17:04,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:04,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:17:04,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:17:04,212 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 6 states. [2019-11-23 20:17:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:04,286 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2019-11-23 20:17:04,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:17:04,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-23 20:17:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:04,291 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:17:04,291 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:17:04,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:17:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:17:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-23 20:17:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:17:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-23 20:17:04,304 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2019-11-23 20:17:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:04,304 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-23 20:17:04,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:17:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-23 20:17:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:17:04,307 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:04,308 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 20:17:04,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:04,517 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:04,518 INFO L82 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2019-11-23 20:17:04,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:04,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646066350] [2019-11-23 20:17:04,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:17:04,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646066350] [2019-11-23 20:17:04,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759148929] [2019-11-23 20:17:04,598 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:17:04,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:17:04,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:04,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:17:04,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:17:04,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:04,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:17:04,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009594269] [2019-11-23 20:17:04,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:17:04,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:17:04,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:17:04,716 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 7 states. [2019-11-23 20:17:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:04,884 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2019-11-23 20:17:04,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:17:04,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-23 20:17:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:04,886 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:17:04,886 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:17:04,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:17:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:17:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2019-11-23 20:17:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:17:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-23 20:17:04,894 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2019-11-23 20:17:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:04,894 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-23 20:17:04,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:17:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-23 20:17:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:17:04,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:04,896 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:05,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:05,101 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2019-11-23 20:17:05,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:05,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179086636] [2019-11-23 20:17:05,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:07,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179086636] [2019-11-23 20:17:07,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158904149] [2019-11-23 20:17:07,223 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:17:07,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:17:07,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:07,287 WARN L253 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-23 20:17:07,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:12,898 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:12,899 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:17:12,901 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:17:12,917 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:12,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:12,922 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:17:12,923 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:17:13,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:13,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:13,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:13,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:13,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 47] total 76 [2019-11-23 20:17:13,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835319315] [2019-11-23 20:17:13,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-11-23 20:17:13,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-11-23 20:17:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5423, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 20:17:13,311 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 76 states. [2019-11-23 20:17:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:52,355 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2019-11-23 20:17:52,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-23 20:17:52,355 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 59 [2019-11-23 20:17:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:52,358 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:17:52,359 INFO L226 Difference]: Without dead ends: 169 [2019-11-23 20:17:52,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=476, Invalid=10442, Unknown=2, NotChecked=0, Total=10920 [2019-11-23 20:17:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-23 20:17:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 101. [2019-11-23 20:17:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:17:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-11-23 20:17:52,384 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2019-11-23 20:17:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:52,385 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-11-23 20:17:52,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-11-23 20:17:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-11-23 20:17:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:17:52,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:52,387 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:52,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:52,590 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2019-11-23 20:17:52,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:52,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117022206] [2019-11-23 20:17:52,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:17:52,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117022206] [2019-11-23 20:17:52,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666774619] [2019-11-23 20:17:52,683 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:52,730 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:17:52,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:52,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:17:52,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:17:52,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:52,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:17:52,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244553061] [2019-11-23 20:17:52,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:17:52,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:17:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:17:52,811 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 13 states. [2019-11-23 20:17:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:53,120 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2019-11-23 20:17:53,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:17:53,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-11-23 20:17:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:53,122 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:17:53,122 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:17:53,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:17:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:17:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 20:17:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 20:17:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2019-11-23 20:17:53,137 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2019-11-23 20:17:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:53,137 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2019-11-23 20:17:53,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:17:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2019-11-23 20:17:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:17:53,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:53,139 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:53,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:53,342 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2019-11-23 20:17:53,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:53,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164128370] [2019-11-23 20:17:53,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:17:53,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164128370] [2019-11-23 20:17:53,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445817894] [2019-11-23 20:17:53,436 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:53,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:17:53,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:53,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:17:53,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:17:53,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:53,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:17:53,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596538374] [2019-11-23 20:17:53,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:17:53,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:17:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:17:53,637 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 13 states. [2019-11-23 20:17:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:53,981 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2019-11-23 20:17:53,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:17:53,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-11-23 20:17:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:53,982 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:17:53,982 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:17:53,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:17:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:17:53,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2019-11-23 20:17:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:17:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2019-11-23 20:17:53,990 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2019-11-23 20:17:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:53,991 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2019-11-23 20:17:53,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:17:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2019-11-23 20:17:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:17:53,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:53,992 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:54,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:54,197 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2019-11-23 20:17:54,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:54,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319713502] [2019-11-23 20:17:54,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:55,271 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2019-11-23 20:17:55,451 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 38 [2019-11-23 20:17:55,632 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2019-11-23 20:17:55,817 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2019-11-23 20:17:55,987 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2019-11-23 20:17:56,159 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2019-11-23 20:17:56,338 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2019-11-23 20:17:56,511 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 29 [2019-11-23 20:17:56,685 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2019-11-23 20:17:56,884 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2019-11-23 20:17:57,077 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2019-11-23 20:17:57,268 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2019-11-23 20:17:57,441 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2019-11-23 20:17:57,616 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2019-11-23 20:17:57,810 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2019-11-23 20:17:57,999 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 32 [2019-11-23 20:17:58,190 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2019-11-23 20:17:58,395 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2019-11-23 20:17:58,590 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2019-11-23 20:17:58,787 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2019-11-23 20:17:58,984 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2019-11-23 20:17:59,159 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2019-11-23 20:17:59,297 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2019-11-23 20:17:59,462 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 32 [2019-11-23 20:17:59,631 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2019-11-23 20:17:59,845 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-11-23 20:18:00,055 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2019-11-23 20:18:00,224 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2019-11-23 20:18:00,396 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2019-11-23 20:18:00,558 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2019-11-23 20:18:00,849 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2019-11-23 20:18:01,016 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2019-11-23 20:18:01,223 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-23 20:18:01,424 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-23 20:18:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:04,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319713502] [2019-11-23 20:18:04,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179515509] [2019-11-23 20:18:04,545 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:04,600 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:18:04,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:04,602 WARN L253 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 117 conjunts are in the unsatisfiable core [2019-11-23 20:18:04,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:04,727 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:18:04,727 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:18:04,736 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:18:04,736 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:18:04,736 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10